read_image (Image, 'E:/halcon学习笔记/328181-20151229163706151-283865989.png')
rgb1_to_gray (Image, GrayImage)
threshold (GrayImage, Region, 0, 40)
dilation_rectangle1 (Region, RegionDilation, 6, 7)
connection (RegionDilation, ConnectedRegions)
select_shape (ConnectedRegions, SelectedRegions, 'area', 'and', 150, 99999)
sort_region (SelectedRegions, SortedRegions, 'first_point', 'true', 'column')
read_ocr_class_mlp ('Industrial_0-9A-Z_Rej.omc', OCRHandle)
do_ocr_multi_class_mlp (SortedRegions, GrayImage, OCRHandle, Class, Confidence)
问题：有的字母识别成了数字，有的数字识别成了字母
转载：https://blog.csdn.net/haojy826/article/details/102555857
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