解决tessert-ocr自动文本方向识别时内存泄漏的问题

third_party/ocr/tesseract-ocr/src/pagesegmain.cpp

@@ -97,30 +97,34 @@ static Pix* RemoveEnclosingCircle(Pix* pixs) {
  * On return the blocks list owns all the constructed page layout.
  */
 int Tesseract::SegmentPage(const STRING* input_file, BLOCK_LIST* blocks,
-                           Tesseract* osd_tess, OSResults* osr) {
+                           Tesseract* osd_tess, OSResults* osr) 
+{
     ASSERT_HOST(pix_binary_ != nullptr);
     int width = pixGetWidth(pix_binary_);
     int height = pixGetHeight(pix_binary_);
     // Get page segmentation mode.
-  auto pageseg_mode = static_cast<PageSegMode>(
-      static_cast<int>(tessedit_pageseg_mode));
+    auto pageseg_mode = static_cast<PageSegMode>(static_cast<int>(tessedit_pageseg_mode));
     // If a UNLV zone file can be found, use that instead of segmentation.
-  if (!PSM_COL_FIND_ENABLED(pageseg_mode) &&
-      input_file != nullptr && input_file->length() > 0) {
+    if (!PSM_COL_FIND_ENABLED(pageseg_mode) && input_file != nullptr && input_file->length() > 0) 
+    {
         STRING name = *input_file;
         const char* lastdot = strrchr(name.string(), '.');
         if (lastdot != nullptr)
             name[lastdot - name.string()] = '\0';
         read_unlv_file(name, width, height, blocks);
     }
-  if (blocks->empty()) {
+
+    if (blocks->empty()) 
+    {
         // No UNLV file present. Work according to the PageSegMode.
         // First make a single block covering the whole image.
         BLOCK_IT block_it(blocks);
         auto* block = new BLOCK("", true, 0, 0, 0, 0, width, height);
         block->set_right_to_left(right_to_left());
         block_it.add_to_end(block);
-  } else {
+    } 
+    else 
+    {
         // UNLV file present. Use PSM_SINGLE_BLOCK.
         pageseg_mode = PSM_SINGLE_BLOCK;
     }
@@ -133,15 +137,13 @@ int Tesseract::SegmentPage(const STRING* input_file, BLOCK_LIST* blocks,
     BLOBNBOX_LIST diacritic_blobs;
     int auto_page_seg_ret_val = 0;
     TO_BLOCK_LIST to_blocks;
-  if (PSM_OSD_ENABLED(pageseg_mode) || PSM_BLOCK_FIND_ENABLED(pageseg_mode) ||
-      PSM_SPARSE(pageseg_mode)) {
-    auto_page_seg_ret_val = AutoPageSeg(
-        pageseg_mode, blocks, &to_blocks,
-        enable_noise_removal ? &diacritic_blobs : nullptr, osd_tess, osr);
+    if (PSM_OSD_ENABLED(pageseg_mode) || PSM_BLOCK_FIND_ENABLED(pageseg_mode) || PSM_SPARSE(pageseg_mode)) 
+    {
+        auto_page_seg_ret_val = AutoPageSeg(pageseg_mode, blocks, &to_blocks, enable_noise_removal ? &diacritic_blobs : nullptr, osd_tess, osr);
       if (pageseg_mode == PSM_OSD_ONLY)
         return auto_page_seg_ret_val;
       // To create blobs from the image region bounds uncomment this line:
-    //  to_blocks.clear();  // Uncomment to go back to the old mode.
+        to_blocks.clear();  // Uncomment to go back to the old mode.
     } else {
       deskew_ = FCOORD(1.0f, 0.0f);
       reskew_ = FCOORD(1.0f, 0.0f);
@@ -213,6 +215,8 @@ int Tesseract::AutoPageSeg(PageSegMode pageseg_mode, BLOCK_LIST* blocks,
 #if 1
   pixDestroy(&photomask_pix);
   pixDestroy(&musicmask_pix);
+  delete finder;
+  blocks->clear();
   return 0;
   #else
   int result = 0;