mirror of
https://git.mirrors.martin98.com/https://github.com/infiniflow/ragflow.git
synced 2025-04-22 06:00:00 +08:00
b68d349bd6
### What problem does this PR solve? Fix: renrank_model and pdf_parser bugs | Update: session API #2575 #2559 ### Type of change - [x] Bug Fix (non-breaking change which fixes an issue) - [x] Refactoring --------- Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
1177 lines
46 KiB
Python
1177 lines
46 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import os
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import random
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import xgboost as xgb
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from io import BytesIO
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import re
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import pdfplumber
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import logging
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from PIL import Image, ImageDraw
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import numpy as np
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from timeit import default_timer as timer
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from pypdf import PdfReader as pdf2_read
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from api.settings import LIGHTEN
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from api.utils.file_utils import get_project_base_directory
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from deepdoc.vision import OCR, Recognizer, LayoutRecognizer, TableStructureRecognizer
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from rag.nlp import rag_tokenizer
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from copy import deepcopy
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from huggingface_hub import snapshot_download
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logging.getLogger("pdfminer").setLevel(logging.WARNING)
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class RAGFlowPdfParser:
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def __init__(self):
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self.ocr = OCR()
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if hasattr(self, "model_speciess"):
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self.layouter = LayoutRecognizer("layout." + self.model_speciess)
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else:
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self.layouter = LayoutRecognizer("layout")
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self.tbl_det = TableStructureRecognizer()
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self.updown_cnt_mdl = xgb.Booster()
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if not LIGHTEN:
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import torch
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if torch.cuda.is_available():
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self.updown_cnt_mdl.set_param({"device": "cuda"})
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try:
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model_dir = os.path.join(
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get_project_base_directory(),
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"rag/res/deepdoc")
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self.updown_cnt_mdl.load_model(os.path.join(
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model_dir, "updown_concat_xgb.model"))
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except Exception as e:
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model_dir = snapshot_download(
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repo_id="InfiniFlow/text_concat_xgb_v1.0",
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local_dir=os.path.join(get_project_base_directory(), "rag/res/deepdoc"),
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local_dir_use_symlinks=False)
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self.updown_cnt_mdl.load_model(os.path.join(
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model_dir, "updown_concat_xgb.model"))
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self.page_from = 0
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"""
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If you have trouble downloading HuggingFace models, -_^ this might help!!
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For Linux:
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export HF_ENDPOINT=https://hf-mirror.com
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For Windows:
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Good luck
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^_-
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"""
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def __char_width(self, c):
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return (c["x1"] - c["x0"]) // max(len(c["text"]), 1)
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def __height(self, c):
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return c["bottom"] - c["top"]
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def _x_dis(self, a, b):
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return min(abs(a["x1"] - b["x0"]), abs(a["x0"] - b["x1"]),
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abs(a["x0"] + a["x1"] - b["x0"] - b["x1"]) / 2)
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def _y_dis(
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self, a, b):
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return (
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b["top"] + b["bottom"] - a["top"] - a["bottom"]) / 2
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def _match_proj(self, b):
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proj_patt = [
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r"第[零一二三四五六七八九十百]+章",
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r"第[零一二三四五六七八九十百]+[条节]",
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r"[零一二三四五六七八九十百]+[、是 ]",
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r"[\(（][零一二三四五六七八九十百]+[）\)]",
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r"[\(（][0-9]+[）\)]",
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r"[0-9]+(、|\.[ ]|）|\.[^0-9./a-zA-Z_%><-]{4,})",
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r"[0-9]+\.[0-9.]+(、|\.[ ])",
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r"[⚫•➢①② ]",
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]
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return any([re.match(p, b["text"]) for p in proj_patt])
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def _updown_concat_features(self, up, down):
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w = max(self.__char_width(up), self.__char_width(down))
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h = max(self.__height(up), self.__height(down))
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y_dis = self._y_dis(up, down)
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LEN = 6
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tks_down = rag_tokenizer.tokenize(down["text"][:LEN]).split(" ")
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tks_up = rag_tokenizer.tokenize(up["text"][-LEN:]).split(" ")
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tks_all = up["text"][-LEN:].strip() \
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+ (" " if re.match(r"[a-zA-Z0-9]+",
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up["text"][-1] + down["text"][0]) else "") \
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+ down["text"][:LEN].strip()
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tks_all = rag_tokenizer.tokenize(tks_all).split(" ")
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fea = [
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up.get("R", -1) == down.get("R", -1),
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y_dis / h,
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down["page_number"] - up["page_number"],
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up["layout_type"] == down["layout_type"],
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up["layout_type"] == "text",
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down["layout_type"] == "text",
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up["layout_type"] == "table",
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down["layout_type"] == "table",
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True if re.search(
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r"([。？！；!?;+)）]|[a-z]\.)$",
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up["text"]) else False,
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True if re.search(r"[，：‘“、0-9（+-]$", up["text"]) else False,
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True if re.search(
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r"(^.?[/,?;:\]，。；：’”？！》】）-])",
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down["text"]) else False,
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True if re.match(r"[\(（][^\(\)（）]+[）\)]$", up["text"]) else False,
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True if re.search(r"[，,][^。.]+$", up["text"]) else False,
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True if re.search(r"[，,][^。.]+$", up["text"]) else False,
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True if re.search(r"[\(（][^\)）]+$", up["text"])
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and re.search(r"[\)）]", down["text"]) else False,
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self._match_proj(down),
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True if re.match(r"[A-Z]", down["text"]) else False,
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True if re.match(r"[A-Z]", up["text"][-1]) else False,
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True if re.match(r"[a-z0-9]", up["text"][-1]) else False,
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True if re.match(r"[0-9.%,-]+$", down["text"]) else False,
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up["text"].strip()[-2:] == down["text"].strip()[-2:] if len(up["text"].strip()
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) > 1 and len(
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down["text"].strip()) > 1 else False,
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up["x0"] > down["x1"],
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abs(self.__height(up) - self.__height(down)) / min(self.__height(up),
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self.__height(down)),
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self._x_dis(up, down) / max(w, 0.000001),
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(len(up["text"]) - len(down["text"])) /
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max(len(up["text"]), len(down["text"])),
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len(tks_all) - len(tks_up) - len(tks_down),
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len(tks_down) - len(tks_up),
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tks_down[-1] == tks_up[-1],
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max(down["in_row"], up["in_row"]),
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abs(down["in_row"] - up["in_row"]),
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len(tks_down) == 1 and rag_tokenizer.tag(tks_down[0]).find("n") >= 0,
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len(tks_up) == 1 and rag_tokenizer.tag(tks_up[0]).find("n") >= 0
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]
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return fea
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@staticmethod
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def sort_X_by_page(arr, threashold):
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# sort using y1 first and then x1
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arr = sorted(arr, key=lambda r: (r["page_number"], r["x0"], r["top"]))
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for i in range(len(arr) - 1):
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for j in range(i, -1, -1):
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# restore the order using th
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if abs(arr[j + 1]["x0"] - arr[j]["x0"]) < threashold \
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and arr[j + 1]["top"] < arr[j]["top"] \
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and arr[j + 1]["page_number"] == arr[j]["page_number"]:
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tmp = arr[j]
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arr[j] = arr[j + 1]
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arr[j + 1] = tmp
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return arr
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def _has_color(self, o):
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if o.get("ncs", "") == "DeviceGray":
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if o["stroking_color"] and o["stroking_color"][0] == 1 and o["non_stroking_color"] and \
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o["non_stroking_color"][0] == 1:
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if re.match(r"[a-zT_\[\]\(\)-]+", o.get("text", "")):
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return False
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return True
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def _table_transformer_job(self, ZM):
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logging.info("Table processing...")
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imgs, pos = [], []
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tbcnt = [0]
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MARGIN = 10
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self.tb_cpns = []
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assert len(self.page_layout) == len(self.page_images)
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for p, tbls in enumerate(self.page_layout): # for page
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tbls = [f for f in tbls if f["type"] == "table"]
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tbcnt.append(len(tbls))
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if not tbls:
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continue
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for tb in tbls: # for table
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left, top, right, bott = tb["x0"] - MARGIN, tb["top"] - MARGIN, \
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tb["x1"] + MARGIN, tb["bottom"] + MARGIN
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left *= ZM
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top *= ZM
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right *= ZM
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bott *= ZM
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pos.append((left, top))
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imgs.append(self.page_images[p].crop((left, top, right, bott)))
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assert len(self.page_images) == len(tbcnt) - 1
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if not imgs:
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return
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recos = self.tbl_det(imgs)
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tbcnt = np.cumsum(tbcnt)
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for i in range(len(tbcnt) - 1): # for page
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pg = []
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for j, tb_items in enumerate(
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recos[tbcnt[i]: tbcnt[i + 1]]): # for table
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poss = pos[tbcnt[i]: tbcnt[i + 1]]
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for it in tb_items: # for table components
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it["x0"] = (it["x0"] + poss[j][0])
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it["x1"] = (it["x1"] + poss[j][0])
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it["top"] = (it["top"] + poss[j][1])
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it["bottom"] = (it["bottom"] + poss[j][1])
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for n in ["x0", "x1", "top", "bottom"]:
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it[n] /= ZM
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it["top"] += self.page_cum_height[i]
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it["bottom"] += self.page_cum_height[i]
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it["pn"] = i
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it["layoutno"] = j
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pg.append(it)
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self.tb_cpns.extend(pg)
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def gather(kwd, fzy=10, ption=0.6):
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eles = Recognizer.sort_Y_firstly(
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[r for r in self.tb_cpns if re.match(kwd, r["label"])], fzy)
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eles = Recognizer.layouts_cleanup(self.boxes, eles, 5, ption)
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return Recognizer.sort_Y_firstly(eles, 0)
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# add R,H,C,SP tag to boxes within table layout
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headers = gather(r".*header$")
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rows = gather(r".* (row|header)")
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spans = gather(r".*spanning")
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clmns = sorted([r for r in self.tb_cpns if re.match(
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r"table column$", r["label"])], key=lambda x: (x["pn"], x["layoutno"], x["x0"]))
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clmns = Recognizer.layouts_cleanup(self.boxes, clmns, 5, 0.5)
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for b in self.boxes:
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if b.get("layout_type", "") != "table":
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continue
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ii = Recognizer.find_overlapped_with_threashold(b, rows, thr=0.3)
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if ii is not None:
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b["R"] = ii
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b["R_top"] = rows[ii]["top"]
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b["R_bott"] = rows[ii]["bottom"]
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ii = Recognizer.find_overlapped_with_threashold(
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b, headers, thr=0.3)
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if ii is not None:
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b["H_top"] = headers[ii]["top"]
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b["H_bott"] = headers[ii]["bottom"]
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b["H_left"] = headers[ii]["x0"]
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b["H_right"] = headers[ii]["x1"]
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b["H"] = ii
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ii = Recognizer.find_horizontally_tightest_fit(b, clmns)
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if ii is not None:
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b["C"] = ii
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b["C_left"] = clmns[ii]["x0"]
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b["C_right"] = clmns[ii]["x1"]
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ii = Recognizer.find_overlapped_with_threashold(b, spans, thr=0.3)
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if ii is not None:
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b["H_top"] = spans[ii]["top"]
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b["H_bott"] = spans[ii]["bottom"]
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b["H_left"] = spans[ii]["x0"]
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b["H_right"] = spans[ii]["x1"]
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b["SP"] = ii
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def __ocr(self, pagenum, img, chars, ZM=3):
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bxs = self.ocr.detect(np.array(img))
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if not bxs:
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self.boxes.append([])
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return
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bxs = [(line[0], line[1][0]) for line in bxs]
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bxs = Recognizer.sort_Y_firstly(
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[{"x0": b[0][0] / ZM, "x1": b[1][0] / ZM,
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"top": b[0][1] / ZM, "text": "", "txt": t,
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"bottom": b[-1][1] / ZM,
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"page_number": pagenum} for b, t in bxs if b[0][0] <= b[1][0] and b[0][1] <= b[-1][1]],
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self.mean_height[-1] / 3
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)
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# merge chars in the same rect
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for c in Recognizer.sort_Y_firstly(
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chars, self.mean_height[pagenum - 1] // 4):
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ii = Recognizer.find_overlapped(c, bxs)
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if ii is None:
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self.lefted_chars.append(c)
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continue
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ch = c["bottom"] - c["top"]
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bh = bxs[ii]["bottom"] - bxs[ii]["top"]
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if abs(ch - bh) / max(ch, bh) >= 0.7 and c["text"] != ' ':
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self.lefted_chars.append(c)
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continue
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if c["text"] == " " and bxs[ii]["text"]:
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if re.match(r"[0-9a-zA-Zа-яА-Я,.?;:!%%]", bxs[ii]["text"][-1]):
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bxs[ii]["text"] += " "
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else:
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bxs[ii]["text"] += c["text"]
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for b in bxs:
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if not b["text"]:
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left, right, top, bott = b["x0"] * ZM, b["x1"] * \
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ZM, b["top"] * ZM, b["bottom"] * ZM
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b["text"] = self.ocr.recognize(np.array(img),
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np.array([[left, top], [right, top], [right, bott], [left, bott]],
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dtype=np.float32))
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del b["txt"]
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bxs = [b for b in bxs if b["text"]]
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if self.mean_height[-1] == 0:
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self.mean_height[-1] = np.median([b["bottom"] - b["top"]
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for b in bxs])
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self.boxes.append(bxs)
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def _layouts_rec(self, ZM, drop=True):
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assert len(self.page_images) == len(self.boxes)
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self.boxes, self.page_layout = self.layouter(
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self.page_images, self.boxes, ZM, drop=drop)
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# cumlative Y
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for i in range(len(self.boxes)):
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self.boxes[i]["top"] += \
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self.page_cum_height[self.boxes[i]["page_number"] - 1]
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self.boxes[i]["bottom"] += \
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self.page_cum_height[self.boxes[i]["page_number"] - 1]
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def _text_merge(self):
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# merge adjusted boxes
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bxs = self.boxes
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def end_with(b, txt):
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txt = txt.strip()
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tt = b.get("text", "").strip()
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return tt and tt.find(txt) == len(tt) - len(txt)
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def start_with(b, txts):
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tt = b.get("text", "").strip()
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return tt and any([tt.find(t.strip()) == 0 for t in txts])
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# horizontally merge adjacent box with the same layout
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i = 0
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while i < len(bxs) - 1:
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b = bxs[i]
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b_ = bxs[i + 1]
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if b.get("layoutno", "0") != b_.get("layoutno", "1") or b.get("layout_type", "") in ["table", "figure",
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"equation"]:
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i += 1
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continue
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if abs(self._y_dis(b, b_)
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) < self.mean_height[bxs[i]["page_number"] - 1] / 3:
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# merge
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bxs[i]["x1"] = b_["x1"]
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bxs[i]["top"] = (b["top"] + b_["top"]) / 2
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bxs[i]["bottom"] = (b["bottom"] + b_["bottom"]) / 2
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bxs[i]["text"] += b_["text"]
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bxs.pop(i + 1)
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continue
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i += 1
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continue
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dis_thr = 1
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dis = b["x1"] - b_["x0"]
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if b.get("layout_type", "") != "text" or b_.get(
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"layout_type", "") != "text":
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if end_with(b, "，") or start_with(b_, "（，"):
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dis_thr = -8
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else:
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i += 1
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continue
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if abs(self._y_dis(b, b_)) < self.mean_height[bxs[i]["page_number"] - 1] / 5 \
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and dis >= dis_thr and b["x1"] < b_["x1"]:
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# merge
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bxs[i]["x1"] = b_["x1"]
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bxs[i]["top"] = (b["top"] + b_["top"]) / 2
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bxs[i]["bottom"] = (b["bottom"] + b_["bottom"]) / 2
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bxs[i]["text"] += b_["text"]
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bxs.pop(i + 1)
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continue
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i += 1
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self.boxes = bxs
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def _naive_vertical_merge(self):
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bxs = Recognizer.sort_Y_firstly(
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self.boxes, np.median(
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self.mean_height) / 3)
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i = 0
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while i + 1 < len(bxs):
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b = bxs[i]
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b_ = bxs[i + 1]
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if b["page_number"] < b_["page_number"] and re.match(
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r"[0-9 •一—-]+$", b["text"]):
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bxs.pop(i)
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continue
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if not b["text"].strip():
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bxs.pop(i)
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continue
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concatting_feats = [
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b["text"].strip()[-1] in ",;:'\"，、‘“；：-",
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len(b["text"].strip()) > 1 and b["text"].strip(
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)[-2] in ",;:'\"，‘“、；：",
|
||
b_["text"].strip() and b_["text"].strip()[0] in "。；？！?”）),，、：",
|
||
]
|
||
# features for not concating
|
||
feats = [
|
||
b.get("layoutno", 0) != b_.get("layoutno", 0),
|
||
b["text"].strip()[-1] in "。？！?",
|
||
self.is_english and b["text"].strip()[-1] in ".!?",
|
||
b["page_number"] == b_["page_number"] and b_["top"] -
|
||
b["bottom"] > self.mean_height[b["page_number"] - 1] * 1.5,
|
||
b["page_number"] < b_["page_number"] and abs(
|
||
b["x0"] - b_["x0"]) > self.mean_width[b["page_number"] - 1] * 4,
|
||
]
|
||
# split features
|
||
detach_feats = [b["x1"] < b_["x0"],
|
||
b["x0"] > b_["x1"]]
|
||
if (any(feats) and not any(concatting_feats)) or any(detach_feats):
|
||
print(
|
||
b["text"],
|
||
b_["text"],
|
||
any(feats),
|
||
any(concatting_feats),
|
||
any(detach_feats))
|
||
i += 1
|
||
continue
|
||
# merge up and down
|
||
b["bottom"] = b_["bottom"]
|
||
b["text"] += b_["text"]
|
||
b["x0"] = min(b["x0"], b_["x0"])
|
||
b["x1"] = max(b["x1"], b_["x1"])
|
||
bxs.pop(i + 1)
|
||
self.boxes = bxs
|
||
|
||
def _concat_downward(self, concat_between_pages=True):
|
||
# count boxes in the same row as a feature
|
||
for i in range(len(self.boxes)):
|
||
mh = self.mean_height[self.boxes[i]["page_number"] - 1]
|
||
self.boxes[i]["in_row"] = 0
|
||
j = max(0, i - 12)
|
||
while j < min(i + 12, len(self.boxes)):
|
||
if j == i:
|
||
j += 1
|
||
continue
|
||
ydis = self._y_dis(self.boxes[i], self.boxes[j]) / mh
|
||
if abs(ydis) < 1:
|
||
self.boxes[i]["in_row"] += 1
|
||
elif ydis > 0:
|
||
break
|
||
j += 1
|
||
|
||
# concat between rows
|
||
boxes = deepcopy(self.boxes)
|
||
blocks = []
|
||
while boxes:
|
||
chunks = []
|
||
|
||
def dfs(up, dp):
|
||
chunks.append(up)
|
||
i = dp
|
||
while i < min(dp + 12, len(boxes)):
|
||
ydis = self._y_dis(up, boxes[i])
|
||
smpg = up["page_number"] == boxes[i]["page_number"]
|
||
mh = self.mean_height[up["page_number"] - 1]
|
||
mw = self.mean_width[up["page_number"] - 1]
|
||
if smpg and ydis > mh * 4:
|
||
break
|
||
if not smpg and ydis > mh * 16:
|
||
break
|
||
down = boxes[i]
|
||
if not concat_between_pages and down["page_number"] > up["page_number"]:
|
||
break
|
||
|
||
if up.get("R", "") != down.get(
|
||
"R", "") and up["text"][-1] != "，":
|
||
i += 1
|
||
continue
|
||
|
||
if re.match(r"[0-9]{2,3}/[0-9]{3}$", up["text"]) \
|
||
or re.match(r"[0-9]{2,3}/[0-9]{3}$", down["text"]) \
|
||
or not down["text"].strip():
|
||
i += 1
|
||
continue
|
||
|
||
if not down["text"].strip() or not up["text"].strip():
|
||
i += 1
|
||
continue
|
||
|
||
if up["x1"] < down["x0"] - 10 * \
|
||
mw or up["x0"] > down["x1"] + 10 * mw:
|
||
i += 1
|
||
continue
|
||
|
||
if i - dp < 5 and up.get("layout_type") == "text":
|
||
if up.get("layoutno", "1") == down.get(
|
||
"layoutno", "2"):
|
||
dfs(down, i + 1)
|
||
boxes.pop(i)
|
||
return
|
||
i += 1
|
||
continue
|
||
|
||
fea = self._updown_concat_features(up, down)
|
||
if self.updown_cnt_mdl.predict(
|
||
xgb.DMatrix([fea]))[0] <= 0.5:
|
||
i += 1
|
||
continue
|
||
dfs(down, i + 1)
|
||
boxes.pop(i)
|
||
return
|
||
|
||
dfs(boxes[0], 1)
|
||
boxes.pop(0)
|
||
if chunks:
|
||
blocks.append(chunks)
|
||
|
||
# concat within each block
|
||
boxes = []
|
||
for b in blocks:
|
||
if len(b) == 1:
|
||
boxes.append(b[0])
|
||
continue
|
||
t = b[0]
|
||
for c in b[1:]:
|
||
t["text"] = t["text"].strip()
|
||
c["text"] = c["text"].strip()
|
||
if not c["text"]:
|
||
continue
|
||
if t["text"] and re.match(
|
||
r"[0-9\.a-zA-Z]+$", t["text"][-1] + c["text"][-1]):
|
||
t["text"] += " "
|
||
t["text"] += c["text"]
|
||
t["x0"] = min(t["x0"], c["x0"])
|
||
t["x1"] = max(t["x1"], c["x1"])
|
||
t["page_number"] = min(t["page_number"], c["page_number"])
|
||
t["bottom"] = c["bottom"]
|
||
if not t["layout_type"] \
|
||
and c["layout_type"]:
|
||
t["layout_type"] = c["layout_type"]
|
||
boxes.append(t)
|
||
|
||
self.boxes = Recognizer.sort_Y_firstly(boxes, 0)
|
||
|
||
def _filter_forpages(self):
|
||
if not self.boxes:
|
||
return
|
||
findit = False
|
||
i = 0
|
||
while i < len(self.boxes):
|
||
if not re.match(r"(contents|目录|目次|table of contents|致谢|acknowledge)$",
|
||
re.sub(r"( | |\u3000)+", "", self.boxes[i]["text"].lower())):
|
||
i += 1
|
||
continue
|
||
findit = True
|
||
eng = re.match(
|
||
r"[0-9a-zA-Z :'.-]{5,}",
|
||
self.boxes[i]["text"].strip())
|
||
self.boxes.pop(i)
|
||
if i >= len(self.boxes):
|
||
break
|
||
prefix = self.boxes[i]["text"].strip()[:3] if not eng else " ".join(
|
||
self.boxes[i]["text"].strip().split(" ")[:2])
|
||
while not prefix:
|
||
self.boxes.pop(i)
|
||
if i >= len(self.boxes):
|
||
break
|
||
prefix = self.boxes[i]["text"].strip()[:3] if not eng else " ".join(
|
||
self.boxes[i]["text"].strip().split(" ")[:2])
|
||
self.boxes.pop(i)
|
||
if i >= len(self.boxes) or not prefix:
|
||
break
|
||
for j in range(i, min(i + 128, len(self.boxes))):
|
||
if not re.match(prefix, self.boxes[j]["text"]):
|
||
continue
|
||
for k in range(i, j):
|
||
self.boxes.pop(i)
|
||
break
|
||
if findit:
|
||
return
|
||
|
||
page_dirty = [0] * len(self.page_images)
|
||
for b in self.boxes:
|
||
if re.search(r"(··|··|··)", b["text"]):
|
||
page_dirty[b["page_number"] - 1] += 1
|
||
page_dirty = set([i + 1 for i, t in enumerate(page_dirty) if t > 3])
|
||
if not page_dirty:
|
||
return
|
||
i = 0
|
||
while i < len(self.boxes):
|
||
if self.boxes[i]["page_number"] in page_dirty:
|
||
self.boxes.pop(i)
|
||
continue
|
||
i += 1
|
||
|
||
def _merge_with_same_bullet(self):
|
||
i = 0
|
||
while i + 1 < len(self.boxes):
|
||
b = self.boxes[i]
|
||
b_ = self.boxes[i + 1]
|
||
if not b["text"].strip():
|
||
self.boxes.pop(i)
|
||
continue
|
||
if not b_["text"].strip():
|
||
self.boxes.pop(i + 1)
|
||
continue
|
||
|
||
if b["text"].strip()[0] != b_["text"].strip()[0] \
|
||
or b["text"].strip()[0].lower() in set("qwertyuopasdfghjklzxcvbnm") \
|
||
or rag_tokenizer.is_chinese(b["text"].strip()[0]) \
|
||
or b["top"] > b_["bottom"]:
|
||
i += 1
|
||
continue
|
||
b_["text"] = b["text"] + "\n" + b_["text"]
|
||
b_["x0"] = min(b["x0"], b_["x0"])
|
||
b_["x1"] = max(b["x1"], b_["x1"])
|
||
b_["top"] = b["top"]
|
||
self.boxes.pop(i)
|
||
|
||
def _extract_table_figure(self, need_image, ZM,
|
||
return_html, need_position):
|
||
tables = {}
|
||
figures = {}
|
||
# extract figure and table boxes
|
||
i = 0
|
||
lst_lout_no = ""
|
||
nomerge_lout_no = []
|
||
while i < len(self.boxes):
|
||
if "layoutno" not in self.boxes[i]:
|
||
i += 1
|
||
continue
|
||
lout_no = str(self.boxes[i]["page_number"]) + \
|
||
"-" + str(self.boxes[i]["layoutno"])
|
||
if TableStructureRecognizer.is_caption(self.boxes[i]) or self.boxes[i]["layout_type"] in ["table caption",
|
||
"title",
|
||
"figure caption",
|
||
"reference"]:
|
||
nomerge_lout_no.append(lst_lout_no)
|
||
if self.boxes[i]["layout_type"] == "table":
|
||
if re.match(r"(数据|资料|图表)*来源[:： ]", self.boxes[i]["text"]):
|
||
self.boxes.pop(i)
|
||
continue
|
||
if lout_no not in tables:
|
||
tables[lout_no] = []
|
||
tables[lout_no].append(self.boxes[i])
|
||
self.boxes.pop(i)
|
||
lst_lout_no = lout_no
|
||
continue
|
||
if need_image and self.boxes[i]["layout_type"] == "figure":
|
||
if re.match(r"(数据|资料|图表)*来源[:： ]", self.boxes[i]["text"]):
|
||
self.boxes.pop(i)
|
||
continue
|
||
if lout_no not in figures:
|
||
figures[lout_no] = []
|
||
figures[lout_no].append(self.boxes[i])
|
||
self.boxes.pop(i)
|
||
lst_lout_no = lout_no
|
||
continue
|
||
i += 1
|
||
|
||
# merge table on different pages
|
||
nomerge_lout_no = set(nomerge_lout_no)
|
||
tbls = sorted([(k, bxs) for k, bxs in tables.items()],
|
||
key=lambda x: (x[1][0]["top"], x[1][0]["x0"]))
|
||
|
||
i = len(tbls) - 1
|
||
while i - 1 >= 0:
|
||
k0, bxs0 = tbls[i - 1]
|
||
k, bxs = tbls[i]
|
||
i -= 1
|
||
if k0 in nomerge_lout_no:
|
||
continue
|
||
if bxs[0]["page_number"] == bxs0[0]["page_number"]:
|
||
continue
|
||
if bxs[0]["page_number"] - bxs0[0]["page_number"] > 1:
|
||
continue
|
||
mh = self.mean_height[bxs[0]["page_number"] - 1]
|
||
if self._y_dis(bxs0[-1], bxs[0]) > mh * 23:
|
||
continue
|
||
tables[k0].extend(tables[k])
|
||
del tables[k]
|
||
|
||
def x_overlapped(a, b):
|
||
return not any([a["x1"] < b["x0"], a["x0"] > b["x1"]])
|
||
|
||
# find captions and pop out
|
||
i = 0
|
||
while i < len(self.boxes):
|
||
c = self.boxes[i]
|
||
# mh = self.mean_height[c["page_number"]-1]
|
||
if not TableStructureRecognizer.is_caption(c):
|
||
i += 1
|
||
continue
|
||
|
||
# find the nearest layouts
|
||
def nearest(tbls):
|
||
nonlocal c
|
||
mink = ""
|
||
minv = 1000000000
|
||
for k, bxs in tbls.items():
|
||
for b in bxs:
|
||
if b.get("layout_type", "").find("caption") >= 0:
|
||
continue
|
||
y_dis = self._y_dis(c, b)
|
||
x_dis = self._x_dis(
|
||
c, b) if not x_overlapped(
|
||
c, b) else 0
|
||
dis = y_dis * y_dis + x_dis * x_dis
|
||
if dis < minv:
|
||
mink = k
|
||
minv = dis
|
||
return mink, minv
|
||
|
||
tk, tv = nearest(tables)
|
||
fk, fv = nearest(figures)
|
||
# if min(tv, fv) > 2000:
|
||
# i += 1
|
||
# continue
|
||
if tv < fv and tk:
|
||
tables[tk].insert(0, c)
|
||
logging.debug(
|
||
"TABLE:" +
|
||
self.boxes[i]["text"] +
|
||
"; Cap: " +
|
||
tk)
|
||
elif fk:
|
||
figures[fk].insert(0, c)
|
||
logging.debug(
|
||
"FIGURE:" +
|
||
self.boxes[i]["text"] +
|
||
"; Cap: " +
|
||
tk)
|
||
self.boxes.pop(i)
|
||
|
||
res = []
|
||
positions = []
|
||
|
||
def cropout(bxs, ltype, poss):
|
||
nonlocal ZM
|
||
pn = set([b["page_number"] - 1 for b in bxs])
|
||
if len(pn) < 2:
|
||
pn = list(pn)[0]
|
||
ht = self.page_cum_height[pn]
|
||
b = {
|
||
"x0": np.min([b["x0"] for b in bxs]),
|
||
"top": np.min([b["top"] for b in bxs]) - ht,
|
||
"x1": np.max([b["x1"] for b in bxs]),
|
||
"bottom": np.max([b["bottom"] for b in bxs]) - ht
|
||
}
|
||
louts = [l for l in self.page_layout[pn] if l["type"] == ltype]
|
||
ii = Recognizer.find_overlapped(b, louts, naive=True)
|
||
if ii is not None:
|
||
b = louts[ii]
|
||
else:
|
||
logging.warn(
|
||
f"Missing layout match: {pn + 1},%s" %
|
||
(bxs[0].get(
|
||
"layoutno", "")))
|
||
|
||
left, top, right, bott = b["x0"], b["top"], b["x1"], b["bottom"]
|
||
if right < left: right = left + 1
|
||
poss.append((pn + self.page_from, left, right, top, bott))
|
||
return self.page_images[pn] \
|
||
.crop((left * ZM, top * ZM,
|
||
right * ZM, bott * ZM))
|
||
pn = {}
|
||
for b in bxs:
|
||
p = b["page_number"] - 1
|
||
if p not in pn:
|
||
pn[p] = []
|
||
pn[p].append(b)
|
||
pn = sorted(pn.items(), key=lambda x: x[0])
|
||
imgs = [cropout(arr, ltype, poss) for p, arr in pn]
|
||
pic = Image.new("RGB",
|
||
(int(np.max([i.size[0] for i in imgs])),
|
||
int(np.sum([m.size[1] for m in imgs]))),
|
||
(245, 245, 245))
|
||
height = 0
|
||
for img in imgs:
|
||
pic.paste(img, (0, int(height)))
|
||
height += img.size[1]
|
||
return pic
|
||
|
||
# crop figure out and add caption
|
||
for k, bxs in figures.items():
|
||
txt = "\n".join([b["text"] for b in bxs])
|
||
if not txt:
|
||
continue
|
||
|
||
poss = []
|
||
res.append(
|
||
(cropout(
|
||
bxs,
|
||
"figure", poss),
|
||
[txt]))
|
||
positions.append(poss)
|
||
|
||
for k, bxs in tables.items():
|
||
if not bxs:
|
||
continue
|
||
bxs = Recognizer.sort_Y_firstly(bxs, np.mean(
|
||
[(b["bottom"] - b["top"]) / 2 for b in bxs]))
|
||
poss = []
|
||
res.append((cropout(bxs, "table", poss),
|
||
self.tbl_det.construct_table(bxs, html=return_html, is_english=self.is_english)))
|
||
positions.append(poss)
|
||
|
||
assert len(positions) == len(res)
|
||
|
||
if need_position:
|
||
return list(zip(res, positions))
|
||
return res
|
||
|
||
def proj_match(self, line):
|
||
if len(line) <= 2:
|
||
return
|
||
if re.match(r"[0-9 ().,%%+/-]+$", line):
|
||
return False
|
||
for p, j in [
|
||
(r"第[零一二三四五六七八九十百]+章", 1),
|
||
(r"第[零一二三四五六七八九十百]+[条节]", 2),
|
||
(r"[零一二三四五六七八九十百]+[、 ]", 3),
|
||
(r"[\(（][零一二三四五六七八九十百]+[）\)]", 4),
|
||
(r"[0-9]+(、|\.[ ]|\.[^0-9])", 5),
|
||
(r"[0-9]+\.[0-9]+(、|[. ]|[^0-9])", 6),
|
||
(r"[0-9]+\.[0-9]+\.[0-9]+(、|[ ]|[^0-9])", 7),
|
||
(r"[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+(、|[ ]|[^0-9])", 8),
|
||
(r".{,48}[：:?？]$", 9),
|
||
(r"[0-9]+）", 10),
|
||
(r"[\(（][0-9]+[）\)]", 11),
|
||
(r"[零一二三四五六七八九十百]+是", 12),
|
||
(r"[⚫•➢✓]", 12)
|
||
]:
|
||
if re.match(p, line):
|
||
return j
|
||
return
|
||
|
||
def _line_tag(self, bx, ZM):
|
||
pn = [bx["page_number"]]
|
||
top = bx["top"] - self.page_cum_height[pn[0] - 1]
|
||
bott = bx["bottom"] - self.page_cum_height[pn[0] - 1]
|
||
page_images_cnt = len(self.page_images)
|
||
if pn[-1] - 1 >= page_images_cnt: return ""
|
||
while bott * ZM > self.page_images[pn[-1] - 1].size[1]:
|
||
bott -= self.page_images[pn[-1] - 1].size[1] / ZM
|
||
pn.append(pn[-1] + 1)
|
||
if pn[-1] - 1 >= page_images_cnt:
|
||
return ""
|
||
|
||
return "@@{}\t{:.1f}\t{:.1f}\t{:.1f}\t{:.1f}##" \
|
||
.format("-".join([str(p) for p in pn]),
|
||
bx["x0"], bx["x1"], top, bott)
|
||
|
||
def __filterout_scraps(self, boxes, ZM):
|
||
|
||
def width(b):
|
||
return b["x1"] - b["x0"]
|
||
|
||
def height(b):
|
||
return b["bottom"] - b["top"]
|
||
|
||
def usefull(b):
|
||
if b.get("layout_type"):
|
||
return True
|
||
if width(
|
||
b) > self.page_images[b["page_number"] - 1].size[0] / ZM / 3:
|
||
return True
|
||
if b["bottom"] - b["top"] > self.mean_height[b["page_number"] - 1]:
|
||
return True
|
||
return False
|
||
|
||
res = []
|
||
while boxes:
|
||
lines = []
|
||
widths = []
|
||
pw = self.page_images[boxes[0]["page_number"] - 1].size[0] / ZM
|
||
mh = self.mean_height[boxes[0]["page_number"] - 1]
|
||
mj = self.proj_match(
|
||
boxes[0]["text"]) or boxes[0].get(
|
||
"layout_type",
|
||
"") == "title"
|
||
|
||
def dfs(line, st):
|
||
nonlocal mh, pw, lines, widths
|
||
lines.append(line)
|
||
widths.append(width(line))
|
||
width_mean = np.mean(widths)
|
||
mmj = self.proj_match(
|
||
line["text"]) or line.get(
|
||
"layout_type",
|
||
"") == "title"
|
||
for i in range(st + 1, min(st + 20, len(boxes))):
|
||
if (boxes[i]["page_number"] - line["page_number"]) > 0:
|
||
break
|
||
if not mmj and self._y_dis(
|
||
line, boxes[i]) >= 3 * mh and height(line) < 1.5 * mh:
|
||
break
|
||
|
||
if not usefull(boxes[i]):
|
||
continue
|
||
if mmj or \
|
||
(self._x_dis(boxes[i], line) < pw / 10): \
|
||
# and abs(width(boxes[i])-width_mean)/max(width(boxes[i]),width_mean)<0.5):
|
||
# concat following
|
||
dfs(boxes[i], i)
|
||
boxes.pop(i)
|
||
break
|
||
|
||
try:
|
||
if usefull(boxes[0]):
|
||
dfs(boxes[0], 0)
|
||
else:
|
||
logging.debug("WASTE: " + boxes[0]["text"])
|
||
except Exception as e:
|
||
pass
|
||
boxes.pop(0)
|
||
mw = np.mean(widths)
|
||
if mj or mw / pw >= 0.35 or mw > 200:
|
||
res.append(
|
||
"\n".join([c["text"] + self._line_tag(c, ZM) for c in lines]))
|
||
else:
|
||
logging.debug("REMOVED: " +
|
||
"<<".join([c["text"] for c in lines]))
|
||
|
||
return "\n\n".join(res)
|
||
|
||
@staticmethod
|
||
def total_page_number(fnm, binary=None):
|
||
try:
|
||
pdf = pdfplumber.open(
|
||
fnm) if not binary else pdfplumber.open(BytesIO(binary))
|
||
return len(pdf.pages)
|
||
except Exception as e:
|
||
logging.error(str(e))
|
||
|
||
def __images__(self, fnm, zoomin=3, page_from=0,
|
||
page_to=299, callback=None):
|
||
self.lefted_chars = []
|
||
self.mean_height = []
|
||
self.mean_width = []
|
||
self.boxes = []
|
||
self.garbages = {}
|
||
self.page_cum_height = [0]
|
||
self.page_layout = []
|
||
self.page_from = page_from
|
||
st = timer()
|
||
try:
|
||
self.pdf = pdfplumber.open(fnm) if isinstance(
|
||
fnm, str) else pdfplumber.open(BytesIO(fnm))
|
||
self.page_images = [p.to_image(resolution=72 * zoomin).annotated for i, p in
|
||
enumerate(self.pdf.pages[page_from:page_to])]
|
||
self.page_chars = [[{**c, 'top': c['top'], 'bottom': c['bottom']} for c in page.dedupe_chars().chars if self._has_color(c)] for page in
|
||
self.pdf.pages[page_from:page_to]]
|
||
self.total_page = len(self.pdf.pages)
|
||
except Exception as e:
|
||
logging.error(str(e))
|
||
|
||
self.outlines = []
|
||
try:
|
||
self.pdf = pdf2_read(fnm if isinstance(fnm, str) else BytesIO(fnm))
|
||
outlines = self.pdf.outline
|
||
|
||
def dfs(arr, depth):
|
||
for a in arr:
|
||
if isinstance(a, dict):
|
||
self.outlines.append((a["/Title"], depth))
|
||
continue
|
||
dfs(a, depth + 1)
|
||
|
||
dfs(outlines, 0)
|
||
except Exception as e:
|
||
logging.warning(f"Outlines exception: {e}")
|
||
if not self.outlines:
|
||
logging.warning(f"Miss outlines")
|
||
|
||
logging.info("Images converted.")
|
||
self.is_english = [re.search(r"[a-zA-Z0-9,/¸;:'\[\]\(\)!@#$%^&*\"?<>._-]{30,}", "".join(
|
||
random.choices([c["text"] for c in self.page_chars[i]], k=min(100, len(self.page_chars[i]))))) for i in
|
||
range(len(self.page_chars))]
|
||
if sum([1 if e else 0 for e in self.is_english]) > len(
|
||
self.page_images) / 2:
|
||
self.is_english = True
|
||
else:
|
||
self.is_english = False
|
||
|
||
st = timer()
|
||
for i, img in enumerate(self.page_images):
|
||
chars = self.page_chars[i] if not self.is_english else []
|
||
self.mean_height.append(
|
||
np.median(sorted([c["height"] for c in chars])) if chars else 0
|
||
)
|
||
self.mean_width.append(
|
||
np.median(sorted([c["width"] for c in chars])) if chars else 8
|
||
)
|
||
self.page_cum_height.append(img.size[1] / zoomin)
|
||
j = 0
|
||
while j + 1 < len(chars):
|
||
if chars[j]["text"] and chars[j + 1]["text"] \
|
||
and re.match(r"[0-9a-zA-Z,.:;!%]+", chars[j]["text"] + chars[j + 1]["text"]) \
|
||
and chars[j + 1]["x0"] - chars[j]["x1"] >= min(chars[j + 1]["width"],
|
||
chars[j]["width"]) / 2:
|
||
chars[j]["text"] += " "
|
||
j += 1
|
||
|
||
self.__ocr(i + 1, img, chars, zoomin)
|
||
if callback and i % 6 == 5:
|
||
callback(prog=(i + 1) * 0.6 / len(self.page_images), msg="")
|
||
# print("OCR:", timer()-st)
|
||
|
||
if not self.is_english and not any(
|
||
[c for c in self.page_chars]) and self.boxes:
|
||
bxes = [b for bxs in self.boxes for b in bxs]
|
||
self.is_english = re.search(r"[\na-zA-Z0-9,/¸;:'\[\]\(\)!@#$%^&*\"?<>._-]{30,}",
|
||
"".join([b["text"] for b in random.choices(bxes, k=min(30, len(bxes)))]))
|
||
|
||
logging.info("Is it English:", self.is_english)
|
||
|
||
self.page_cum_height = np.cumsum(self.page_cum_height)
|
||
assert len(self.page_cum_height) == len(self.page_images) + 1
|
||
if len(self.boxes) == 0 and zoomin < 9: self.__images__(fnm, zoomin * 3, page_from,
|
||
page_to, callback)
|
||
|
||
def __call__(self, fnm, need_image=True, zoomin=3, return_html=False):
|
||
self.__images__(fnm, zoomin)
|
||
self._layouts_rec(zoomin)
|
||
self._table_transformer_job(zoomin)
|
||
self._text_merge()
|
||
self._concat_downward()
|
||
self._filter_forpages()
|
||
tbls = self._extract_table_figure(
|
||
need_image, zoomin, return_html, False)
|
||
return self.__filterout_scraps(deepcopy(self.boxes), zoomin), tbls
|
||
|
||
def remove_tag(self, txt):
|
||
return re.sub(r"@@[\t0-9.-]+?##", "", txt)
|
||
|
||
def crop(self, text, ZM=3, need_position=False):
|
||
imgs = []
|
||
poss = []
|
||
for tag in re.findall(r"@@[0-9-]+\t[0-9.\t]+##", text):
|
||
pn, left, right, top, bottom = tag.strip(
|
||
"#").strip("@").split("\t")
|
||
left, right, top, bottom = float(left), float(
|
||
right), float(top), float(bottom)
|
||
poss.append(([int(p) - 1 for p in pn.split("-")],
|
||
left, right, top, bottom))
|
||
if not poss:
|
||
if need_position:
|
||
return None, None
|
||
return
|
||
|
||
max_width = max(
|
||
np.max([right - left for (_, left, right, _, _) in poss]), 6)
|
||
GAP = 6
|
||
pos = poss[0]
|
||
poss.insert(0, ([pos[0][0]], pos[1], pos[2], max(
|
||
0, pos[3] - 120), max(pos[3] - GAP, 0)))
|
||
pos = poss[-1]
|
||
poss.append(([pos[0][-1]], pos[1], pos[2], min(self.page_images[pos[0][-1]].size[1] / ZM, pos[4] + GAP),
|
||
min(self.page_images[pos[0][-1]].size[1] / ZM, pos[4] + 120)))
|
||
|
||
positions = []
|
||
for ii, (pns, left, right, top, bottom) in enumerate(poss):
|
||
right = left + max_width
|
||
bottom *= ZM
|
||
for pn in pns[1:]:
|
||
bottom += self.page_images[pn - 1].size[1]
|
||
imgs.append(
|
||
self.page_images[pns[0]].crop((left * ZM, top * ZM,
|
||
right *
|
||
ZM, min(
|
||
bottom, self.page_images[pns[0]].size[1])
|
||
))
|
||
)
|
||
if 0 < ii < len(poss) - 1:
|
||
positions.append((pns[0] + self.page_from, left, right, top, min(
|
||
bottom, self.page_images[pns[0]].size[1]) / ZM))
|
||
bottom -= self.page_images[pns[0]].size[1]
|
||
for pn in pns[1:]:
|
||
imgs.append(
|
||
self.page_images[pn].crop((left * ZM, 0,
|
||
right * ZM,
|
||
min(bottom,
|
||
self.page_images[pn].size[1])
|
||
))
|
||
)
|
||
if 0 < ii < len(poss) - 1:
|
||
positions.append((pn + self.page_from, left, right, 0, min(
|
||
bottom, self.page_images[pn].size[1]) / ZM))
|
||
bottom -= self.page_images[pn].size[1]
|
||
|
||
if not imgs:
|
||
if need_position:
|
||
return None, None
|
||
return
|
||
height = 0
|
||
for img in imgs:
|
||
height += img.size[1] + GAP
|
||
height = int(height)
|
||
width = int(np.max([i.size[0] for i in imgs]))
|
||
pic = Image.new("RGB",
|
||
(width, height),
|
||
(245, 245, 245))
|
||
height = 0
|
||
for ii, img in enumerate(imgs):
|
||
if ii == 0 or ii + 1 == len(imgs):
|
||
img = img.convert('RGBA')
|
||
overlay = Image.new('RGBA', img.size, (0, 0, 0, 0))
|
||
overlay.putalpha(128)
|
||
img = Image.alpha_composite(img, overlay).convert("RGB")
|
||
pic.paste(img, (0, int(height)))
|
||
height += img.size[1] + GAP
|
||
|
||
if need_position:
|
||
return pic, positions
|
||
return pic
|
||
|
||
def get_position(self, bx, ZM):
|
||
poss = []
|
||
pn = bx["page_number"]
|
||
top = bx["top"] - self.page_cum_height[pn - 1]
|
||
bott = bx["bottom"] - self.page_cum_height[pn - 1]
|
||
poss.append((pn, bx["x0"], bx["x1"], top, min(
|
||
bott, self.page_images[pn - 1].size[1] / ZM)))
|
||
while bott * ZM > self.page_images[pn - 1].size[1]:
|
||
bott -= self.page_images[pn - 1].size[1] / ZM
|
||
top = 0
|
||
pn += 1
|
||
poss.append((pn, bx["x0"], bx["x1"], top, min(
|
||
bott, self.page_images[pn - 1].size[1] / ZM)))
|
||
return poss
|
||
|
||
|
||
class PlainParser(object):
|
||
def __call__(self, filename, from_page=0, to_page=100000, **kwargs):
|
||
self.outlines = []
|
||
lines = []
|
||
try:
|
||
self.pdf = pdf2_read(
|
||
filename if isinstance(
|
||
filename, str) else BytesIO(filename))
|
||
for page in self.pdf.pages[from_page:to_page]:
|
||
lines.extend([t for t in page.extract_text().split("\n")])
|
||
|
||
outlines = self.pdf.outline
|
||
|
||
def dfs(arr, depth):
|
||
for a in arr:
|
||
if isinstance(a, dict):
|
||
self.outlines.append((a["/Title"], depth))
|
||
continue
|
||
dfs(a, depth + 1)
|
||
|
||
dfs(outlines, 0)
|
||
except Exception as e:
|
||
logging.warning(f"Outlines exception: {e}")
|
||
if not self.outlines:
|
||
logging.warning(f"Miss outlines")
|
||
|
||
return [(l, "") for l in lines], []
|
||
|
||
def crop(self, ck, need_position):
|
||
raise NotImplementedError
|
||
|
||
@staticmethod
|
||
def remove_tag(txt):
|
||
raise NotImplementedError
|
||
|
||
|
||
if __name__ == "__main__":
|
||
pass
|