HALCON从入门到入门-高斯线提取，傅里叶变换

测试效果

处理步骤

1.读取图片

2.分离出蓝色通道

decompose3 (Image, R, G, B)

3.将蓝色通道使用FFT转频域 应用高斯滤波后再转回来，转回来后和原图做差

rft_generic (B, ImageFFT, 'to_freq', 'none', 'complex', Width)
gen_gauss_filter (ImageGauss, 100, 100, 0, 'n', 'rft', Width, Height)
convol_fft (ImageFFT, ImageGauss, ImageConvol)
rft_generic (ImageConvol, ImageFFT1, 'from_freq', 'none', 'byte', Width)
sub_image (B, ImageFFT1, ImageSub, 2, 100)

4.针对上述处理后得到的图，执行高斯轮廓提取

get_domain (ImageZoomed, Domain)
erosion_rectangle1 (Domain, RegionErosion, 7, 7)
reduce_domain (ImageZoomed, RegionErosion, ImageReduced)
lines_gauss (ImageReduced, Lines, Sigma, Low, High, 'dark', 'true', 'gaussian', 'true')
hom_mat2d_identity (HomMat2DIdentity)
hom_mat2d_scale_local (HomMat2DIdentity, 1 / ScaleFactor, 1 / ScaleFactor, HomMat2DScale)
affine_trans_contour_xld (Lines, Defects, HomMat2DScale)