Division method for extracted watershed SAR image with threshold method and marking
A technology for marking watersheds and image segmentation, which is applied in the field of image processing to achieve the effects of ensuring accuracy, reducing storage capacity, and reducing over-segmentation
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[0031] refer to figure 1 , the concrete realization process of the present invention is as follows:
[0032] 1. Perform Gaussian low-pass filtering on the original image Img to obtain the filtered image GImg;
[0033]The invention uses Gaussian low-pass filter to remove the details or noise part of the image. The working principle of the Gaussian low-pass filter can be analyzed in the frequency domain. The basic idea is to suppress the components of the image in the high-frequency range of the Fourier space, while leaving the low-frequency components unaffected, thereby changing the frequency distribution of the output image to achieve the purpose of filtering. The basic steps are: (1) use (-1) x+y Multiply the input image to perform center transformation; (2) Calculate the DFT of the image, namely F(u, v); (3) Multiply the filter function H(u, v) by F(u, v); (4) Calculate the IDFT of (3); (5) get the real part of (4); (6) use (-1) x+y Multiply the result in (5). in, ...
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