halcon车牌的识别

halcon代码：

read_image (Audi2, 'audi2')
fill_interlace (Audi2, ImageFilled, 'odd')
dev_set_color('green')
threshold (ImageFilled, Region, 0, 90)
connection (Region, ConnectedRegions)
select_shape (ConnectedRegions, SelectedRegions, 'width', 'and', 30, 70)
select_shape (SelectedRegions, Letters, 'height', 'and', 60, 110)
*dev_clear_window ()
*dev_set_colored (12)
*dev_display (ImageFilled)
*dev_display (Letters)

   
read_ocr_class_mlp('Industrial_0-9A-Z.omc',OCRHandle) 
do_ocr_multi_class_mlp(Letters,Audi2,OCRHandle, Class, Confidence)
  
*显示识别的结果
area_center(Letters, Area, Row, Column)
for Index := 0 to 6 by 1
     disp_message(3600, Class[Index], 'window', Row[Index], Column[Index], 'black', 'true')
 endfor

初始图片：

处理后的图片，将车牌所在的区域识别出来：

显示输出结果：

*Class[0]--class[6]分别为GAPV329

area_center(Letters, Area, Row, Column)
for Index := 0 to 6 by 1
     disp_message(3600, Class[Index], 'window', Row[Index], Column[Index], 'black', 'true')
 endfor