Halcon项目OCR助手使用心得

read_image (Image1381Bcb4442e5fb68e9, 'F:/yuan/Image/13_81_bcb4442e5fb68e9.bmp')

• OCR 01: Code generated by OCR 01
• OCR 01:
• OCR 01: Prepare text model
• OCR 01:
  create_text_model_reader ('manual', [], TextModel)
  set_text_model_param (TextModel, 'manual_polarity', 'light_on_dark')//暗背景中亮文本
  set_text_model_param (TextModel, 'manual_char_width', 37)//符号宽度
  set_text_model_param (TextModel, 'manual_char_height', 74)//符号高度
  set_text_model_param (TextModel, 'manual_stroke_width', 6.5)//笔画宽度
  set_text_model_param (TextModel, 'manual_return_punctuation', 'false')//是否存在标点符号
  set_text_model_param (TextModel, 'manual_return_separators', 'false')//是否有分隔符
  set_text_model_param (TextModel, 'manual_uppercase_only', 'true')//是否全部大写
  set_text_model_param (TextModel, 'manual_fragment_size_min', 5)//最小尺寸片段
  set_text_model_param (TextModel, 'manual_add_fragments', 'false')
  set_text_model_param (TextModel, 'manual_base_line_tolerance', 0.28)//基线公差
  set_text_model_param (TextModel, 'manual_max_line_num', 3)//文本行的最大行，需要识别的字符文本行有多少行
  set_text_model_param (TextModel, 'manual_eliminate_horizontal_lines', 'true')//是否消除背景横线
• OCR 01:
• OCR 01: Load classifier
• OCR 01:
  read_ocr_class_mlp ('Industrial_NoRej.omc', OcrHandle)
• OCR 01: ***************************************************************
• OCR 01: * The code which follows is to be executed once / image *
• OCR 01: ***************************************************************
• OCR 01:
• OCR 01: Load image
  read_image (Image, 'F:/yuan/Image/13_81_bcb4442e5fb68e9.bmp')
• OCR 01:
• OCR 01: Perform actual processing (once per ROI)
• OCR 01: Generate regions of interest
  gen_rectangle1 (ROI_OCR_01_0, 130.125, 243.875, 367.625, 557.625)
• OCR 01:
• OCR 01: Extract symbol regions (segmentation step)
• OCR 01: Only consider first channel for color images
  *access_channel (Image, TmpObj_Mono, 1)
  reduce_domain (Image, ROI_OCR_01_0, TmpObj_MonoReduced_OCR_01_0)
• OCR 01:
• OCR 01: Orientation Correction (for consistent border and domain
• OCR 01: handling, this is always applied, even with no rotation)
• OCR 01:
  *hom_mat2d_identity (TmpCtrl_MatrixIdentity)
• OCR 01: Apply transformation to image and domain
  *get_domain (TmpObj_MonoReduced_OCR_01_0, TmpObj_Domain)
  *get_system ('clip_region', TmpCtrl_ClipRegion)
  *set_system ('clip_region', 'false')
  *dilation_circle (TmpObj_Domain, TmpObj_DomainExpanded, 32)
  *affine_trans_region (TmpObj_DomainExpanded, TmpObj_DomainTransformedRaw, TmpCtrl_MatrixIdentity, 'true')
  *smallest_rectangle1 (ROI_OCR_01_0, TmpCtrl_Row1, TmpCtrl_Col1, TmpCtrl_Row2, TmpCtrl_Col2)
  *hom_mat2d_translate (TmpCtrl_MatrixIdentity, -TmpCtrl_Row1, -TmpCtrl_Col1, TmpCtrl_MatrixTranslation)
  *hom_mat2d_compose (TmpCtrl_MatrixTranslation, TmpCtrl_MatrixIdentity, TmpCtrl_MatrixComposite)
  *affine_trans_region (TmpObj_Domain, TmpObj_DomainTransformed, TmpCtrl_MatrixComposite, 'true')
  *affine_trans_image (TmpObj_MonoReduced_OCR_01_0, TmpObj_ImageTransformed, TmpCtrl_MatrixComposite, 'constant', 'true')
  *dilation_circle (TmpObj_Domain, TmpObj_DomainExpanded, 32)
  *expand_domain_gray (TmpObj_ImageTransformed, TmpObj_ImageTransformedExpanded, 32)
  *reduce_domain (TmpObj_ImageTransformed, TmpObj_DomainTransformed, TmpObj_ImageTransformedReduced)
  *crop_part (TmpObj_ImageTransformedReduced, TmpObj_MonoReduced_OCR_01_0, 0, 0, TmpCtrl_Col2-TmpCtrl_Col1+1, TmpCtrl_Row2-TmpCtrl_Row1+1)
  *set_system ('clip_region', TmpCtrl_ClipRegion)
  find_text (TmpObj_MonoReduced_OCR_01_0, TextModel, TmpCtrl_ResultHandle_OCR_01_0)
• OCR 01:
• OCR 01: Read text (classification step)
• OCR 01: Gray values for reading must be dark on bright
  invert_image (TmpObj_MonoReduced_OCR_01_0, TmpObj_MonoInverted_OCR_01_0)
  get_text_object (Symbols_OCR_01_0, TmpCtrl_ResultHandle_OCR_01_0, 'manual_all_lines')
  clear_text_result (TmpCtrl_ResultHandle_OCR_01_0)
  dev_display (TmpObj_MonoInverted_OCR_01_0)
  dev_set_draw ('fill')
  dev_set_colored (3)
  dev_display (Symbols_OCR_01_0)
  do_ocr_multi_class_mlp (Symbols_OCR_01_0, TmpObj_MonoInverted_OCR_01_0, OcrHandle, SymbolNames_OCR_01_0, Confidences_OCR_01_0)
• OCR 01:
• OCR 01: Do something with the results
• OCR 01:
• OCR 01: Cleanup (global)
  clear_text_model (TextModel)
  clear_ocr_class_mlp (OcrHandle)