Halcon 提取瓶盖上的字符

先看效果：

Halcon源代码如下：

dev_close_window ()
dev_open_window (0, 0, 512, 512, 'black', WindowHandle)
read_image (ImageOriginal, 'D:/Camera/7.bmp')
threshold (ImageOriginal, Regions, 145, 255)
fill_up (Regions, RegionFillUp)
connection (RegionFillUp, ConnectedRegions)
select_shape (ConnectedRegions, SelectedRegions, 'area', 'and', 49628.9, 500000)
reduce_domain (ImageOriginal, SelectedRegions, ImageReduced)
emphasize (ImageReduced, ImageEmphasize, 7, 7, 50)
median_image (ImageEmphasize, ImageMedian, 'circle', 5, 'mirrored')
scale_image (ImageMedian, ImageScaled, 4, 0)
threshold (ImageScaled, Regions1, 0, 34)
erosion_circle (Regions1, RegionErosion, 1)
connection (RegionErosion, ConnectedRegions1)
select_shape (ConnectedRegions1, SelectedRegions1, 'area', 'and', 120.76, 1500)
sort_region (SelectedRegions1, SortedRegions, 'character', 'true', 'row')
read_ocr_class_mlp ('DotPrint_0-9A-Z_Rej.omc', OCRHandle)
do_ocr_multi_class_mlp (SortedRegions, ImageReduced, OCRHandle, Class, Confidence) 

letters:=''
for Index := 0 to |Class|-1 by 1
    letters:= letters + Class[Index]
endfor

disp_message (WindowHandle, letters, 'window', 200, 50, 'black', 'true')