Optimize ocr (#5297)

### What problem does this PR solve?

Introduced OCR.recognize_batch

### Type of change

- [x] Performance Improvement

deepdoc/parser/pdf_parser.py

@@ -17,6 +17,7 @@
 import logging
 import os
 import random
+from timeit import default_timer as timer
 
 import xgboost as xgb
 from io import BytesIO
@@ -277,7 +278,11 @@ class RAGFlowPdfParser:
                 b["SP"] = ii
 
     def __ocr(self, pagenum, img, chars, ZM=3):
+        start = timer()
         bxs = self.ocr.detect(np.array(img))
+        logging.info(f"__ocr detecting boxes of a image cost ({timer() - start}s)")
+
+        start = timer()
         if not bxs:
             self.boxes.append([])
             return
@@ -308,14 +313,22 @@ class RAGFlowPdfParser:
             else:
                 bxs[ii]["text"] += c["text"]
 
+        logging.info(f"__ocr sorting {len(chars)} chars cost {timer() - start}s")
+        start = timer()
+        boxes_to_reg = []
+        img_np = np.array(img)
         for b in bxs:
             if not b["text"]:
                 left, right, top, bott = b["x0"] * ZM, b["x1"] * \
                                          ZM, b["top"] * ZM, b["bottom"] * ZM
-                b["text"] = self.ocr.recognize(np.array(img),
+                b["box_image"] = self.ocr.get_rotate_crop_image(img_np, np.array([[left, top], [right, top], [right, bott], [left, bott]], dtype=np.float32))
-                                               np.array([[left, top], [right, top], [right, bott], [left, bott]],
+                boxes_to_reg.append(b)
-                                                        dtype=np.float32))
             del b["txt"]
+        texts = self.ocr.recognize_batch([b["box_image"] for b in boxes_to_reg])
+        for i in range(len(boxes_to_reg)):
+            boxes_to_reg[i]["text"] = texts[i]
+            del boxes_to_reg[i]["box_image"]
+        logging.info(f"__ocr recognize {len(bxs)} boxes cost {timer() - start}s")
         bxs = [b for b in bxs if b["text"]]
         if self.mean_height[-1] == 0:
             self.mean_height[-1] = np.median([b["bottom"] - b["top"]
@@ -951,6 +964,7 @@ class RAGFlowPdfParser:
         self.page_cum_height = [0]
         self.page_layout = []
         self.page_from = page_from
+        start = timer()
         try:
             self.pdf = pdfplumber.open(fnm) if isinstance(
                 fnm, str) else pdfplumber.open(BytesIO(fnm))
@@ -965,6 +979,7 @@ class RAGFlowPdfParser:
             self.total_page = len(self.pdf.pages)
         except Exception:
             logging.exception("RAGFlowPdfParser __images__")
+        logging.info(f"__images__ dedupe_chars cost {timer() - start}s")
 
         self.outlines = []
         try:
@@ -994,7 +1009,7 @@ class RAGFlowPdfParser:
         else:
             self.is_english = False
 
-        # st = timer()
+        start = timer()
         for i, img in enumerate(self.page_images):
             chars = self.page_chars[i] if not self.is_english else []
             self.mean_height.append(
@@ -1016,7 +1031,7 @@ class RAGFlowPdfParser:
             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)
+        logging.info(f"__images__ {len(self.page_images)} pages cost {timer() - start}s")
 
         if not self.is_english and not any(
                 [c for c in self.page_chars]) and self.boxes:

deepdoc/vision/ocr.py

@@ -620,6 +620,16 @@ class OCR(object):
             return ""
         return text
 
+    def recognize_batch(self, img_list):
+        rec_res, elapse = self.text_recognizer(img_list)
+        texts = []
+        for i in range(len(rec_res)):
+            text, score = rec_res[i]
+            if score < self.drop_score:
+                text = ""
+            texts.append(text)
+        return texts
+
     def __call__(self, img, cls=True):
         time_dict = {'det': 0, 'rec': 0, 'cls': 0, 'all': 0}
 

rag/svr/task_executor.py

@@ -18,7 +18,7 @@
 # beartype_all(conf=BeartypeConf(violation_type=UserWarning))    # <-- emit warnings from all code
 import random
 import sys
-from api.utils.log_utils import initRootLogger
+from api.utils.log_utils import initRootLogger, get_project_base_directory
 from graphrag.general.index import WithCommunity, WithResolution, Dealer
 from graphrag.light.graph_extractor import GraphExtractor as LightKGExt
 from graphrag.general.graph_extractor import GraphExtractor as GeneralKGExt
@@ -42,6 +42,7 @@ from io import BytesIO
 from multiprocessing.context import TimeoutError
 from timeit import default_timer as timer
 import tracemalloc
+import signal
 
 import numpy as np
 from peewee import DoesNotExist
@@ -96,6 +97,35 @@ DONE_TASKS = 0
 FAILED_TASKS = 0
 CURRENT_TASK = None
 
+tracemalloc_started = False
+
+# SIGUSR1 handler: start tracemalloc and take snapshot
+def start_tracemalloc_and_snapshot(signum, frame):
+    global tracemalloc_started
+    if not tracemalloc_started:
+        logging.info("got SIGUSR1, start tracemalloc")
+        tracemalloc.start()
+        tracemalloc_started = True
+    else:
+        logging.info("got SIGUSR1, tracemalloc is already running")
+
+    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
+    snapshot_file = f"snapshot_{timestamp}.trace"
+    snapshot_file = os.path.abspath(os.path.join(get_project_base_directory(), "logs", f"{os.getpid()}_snapshot_{timestamp}.trace"))
+
+    snapshot = tracemalloc.take_snapshot()
+    snapshot.dump(snapshot_file)
+    logging.info(f"taken snapshot {snapshot_file}")
+
+# SIGUSR2 handler: stop tracemalloc
+def stop_tracemalloc(signum, frame):
+    global tracemalloc_started
+    if tracemalloc_started:
+        logging.info("go SIGUSR2, stop tracemalloc")
+        tracemalloc.stop()
+        tracemalloc_started = False
+    else:
+        logging.info("got SIGUSR2, tracemalloc not running")
 
 class TaskCanceledException(Exception):
     def __init__(self, msg):
@@ -712,26 +742,18 @@ def main():
     logging.info(f'TaskExecutor: RAGFlow version: {get_ragflow_version()}')
     settings.init_settings()
     print_rag_settings()
+    signal.signal(signal.SIGUSR1, start_tracemalloc_and_snapshot)
+    signal.signal(signal.SIGUSR2, stop_tracemalloc)
+    TRACE_MALLOC_ENABLED = int(os.environ.get('TRACE_MALLOC_ENABLED', "0"))
+    if TRACE_MALLOC_ENABLED:
+        start_tracemalloc_and_snapshot(None, None)
+
     background_thread = threading.Thread(target=report_status)
     background_thread.daemon = True
     background_thread.start()
 
-    TRACE_MALLOC_DELTA = int(os.environ.get('TRACE_MALLOC_DELTA', "0"))
-    TRACE_MALLOC_FULL = int(os.environ.get('TRACE_MALLOC_FULL', "0"))
-    if TRACE_MALLOC_DELTA > 0:
-        if TRACE_MALLOC_FULL < TRACE_MALLOC_DELTA:
-            TRACE_MALLOC_FULL = TRACE_MALLOC_DELTA
-        tracemalloc.start()
-        snapshot1 = tracemalloc.take_snapshot()
     while True:
         handle_task()
-        num_tasks = DONE_TASKS + FAILED_TASKS
-        if TRACE_MALLOC_DELTA > 0 and num_tasks > 0 and num_tasks % TRACE_MALLOC_DELTA == 0:
-            snapshot2 = tracemalloc.take_snapshot()
-            analyze_heap(snapshot1, snapshot2, int(num_tasks / TRACE_MALLOC_DELTA), num_tasks % TRACE_MALLOC_FULL == 0)
-            snapshot1 = snapshot2
-            snapshot2 = None
-
 
 if __name__ == "__main__":
     main()