halcon旋转车牌识别

read_image (Image, 'C:/Users/asus/Desktop/2345_image_file_copy_1 (1).jpg')
dev_close_window ()
dev_open_window (0, 0, 640, 480, 'black', WindowHandle)

decompose3 (Image, Red, Green, Blue)
    trans_from_rgb (Red, Green, Blue, Hue, Saturation, Intensity, 'hsv')
    
threshold (Saturation, Regions, 167, 255)
reduce_domain (Hue, Regions, ImageReduced)
opening_circle (Regions, RegionOpening, 3.5)
closing_rectangle1 (RegionOpening, RegionClosing, 30, 30)
orientation_region (RegionClosing, Phi)
area_center (RegionClosing, Area, Row, Column)
vector_angle_to_rigid (Row, Column,Phi, Row, Column, 3.14, HomMat2D)
affine_trans_image (Image, ImageAffineTrans, HomMat2D, 'constant', 'false')
affine_trans_region (RegionClosing, RegionAffineTrans, HomMat2D, 'nearest_neighbor')
reduce_domain (ImageAffineTrans, RegionAffineTrans, ImageReduced1)

invert_image (ImageReduced1, ImageInvert)
rgb1_to_gray (ImageReduced1, GrayImage)
threshold (GrayImage, Regions1, 83, 141)
connection (Regions1, ConnectedRegions)
select_shape (ConnectedRegions, SelectedRegions, ['area','width','height'], 'and', [439.49,0,0], [1292.99,50,100])
sort_region (SelectedRegions, SortedRegions, 'character', 'true', 'column')
read_ocr_class_mlp ('Industrial_0-9A-Z_NoRej.omc', OCRHandle)
do_ocr_multi_class_mlp (SortedRegions,  ImageInvert, OCRHandle, Class, Confidence)
disp_message (WindowHandle, Class, 'window', 0, 0, 'black', 'true')

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转载自blog.csdn.net/terry_n/article/details/80949301
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