read_image (Image, 'C:/Users/x110276/Desktop/变换前.png')

rgb1_to_gray(Image, GrayImage)

fft_image(GrayImage, ImageFFT)
get_image_size(ImageFFT, Width, Height)
gen_rectangle2 (Rectangle, Height/2.0, Width/2.0, 3.1415926/2.0, 200, 2.5)
gen_rectangle2 (Rectangle1, Height/2.0, Width/2.0, 3.1415926/2.0, 10, 2.5)
difference (Rectangle, Rectangle1, RegionDifference)
paint_region (RegionDifference, ImageFFT, ImageResult, 0, 'fill')
fft_image_inv (ImageResult, ImageFFTInv)

原始数据：