Fundus image vascular segmentation method based on phase congruency
A fundus image and consistency technology, applied in the field of image processing, can solve the problems of inability to correctly segment blood vessels, insensitivity to image brightness and contrast, and achieve the effect of improving the correct segmentation rate of blood vessels, filtering out noise, and good anti-noise performance.
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[0030] The flow chart of the present invention is as figure 1 As shown, the green channel of the fundus image is first extracted, and the contrast of the image is enhanced by contrast-limited adaptive histogram equalization (CLAHE); the anisotropic coupled diffusion equation is used to filter to improve the definition of blood vessels; based on phase consistency The algorithm performs blood vessel segmentation on the fundus images with or without the anisotropic coupling diffusion equation filtering; then the pixel-level multiplication of two blood vessel images based on the phase consistency (PC) method; finally, the multiplied image After valueization, the image is optimized with mathematical morphological operations. The specific implementation process of the technical solution of the present invention will be described below in conjunction with the accompanying drawings.
[0031] 1. Extract the green channel of the fundus image;
[0032] Enter as figure 2 The color fun...
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