Double threshold blood vessel image processing method based on random direction histogram ratio
A technology of direction histogram and blood vessel image, applied in the field of double-threshold blood vessel image processing, can solve problems such as blood vessel error removal, and achieve the effect of noise removal, strong denoising ability and fast calculation speed
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[0041] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0042] In order to solve the problem of removing noise pollution in blood vessel images, the present invention is based on the characteristics of the geometric distribution of blood vessels, that is, the distribution of blood vessel pixels in a certain direction is dominant, and proposes a method for detecting the image properties of sub-windows of blood vessel images based on random probes The index, that is, the direction histogram ratio, according to the value of the direction histogram ratio, can identify the noise pollution area and the blood vessel area in the blood vessel image, and use a high threshold for thresholding the noise pollution area, so that the noise pixels can be eliminated as much as possible. For the blood vessel area, a low threshold is used for thresholding processing,...
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