A method of brightness equalization of fundus images
A fundus image and equalization method technology, which is applied in the field of medical image processing, can solve the problems of image brightness imbalance, time-consuming and cost-consuming, high detection cost, etc., so as to avoid time-consuming and cost-consuming, reduce detection cost, and solve the problem of brighter brightness Effect
Active Publication Date: 2022-07-15
杭州瞳创医疗科技有限公司
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Problems solved by technology
However, due to the interference of the light and the uneven reflection of the fundus tissue during shooting, the brightness of the image is uneven, and the edge brightness is brighter, which cannot well reflect the characteristics of the patient's fundus
At present, it is possible to take photos with balanced brightness through expensive fundus equipment, but expensive fundus equipment is expensive in terms of use and maintenance costs, resulting in high detection costs
There are also some manufacturers trying to improve the brightness balance of fundus photos by adjusting the optical system or mechanical structure of ophthalmic equipment, but these require a lot of time and cost
Method used
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Embodiment 1
[0038] S01. Collect a fundus picture of a subject, mask the obtained fundus picture, and replace the image part outside the fundus (ie, outside the central circular area) with a black background to obtain a fundus mask picture;
[0039] S02. Divide the fundus mask image into three channels, R, G, and B, and obtain the R channel original image, G channel original image and B channel original image of the fundus mask image. Because the brightness of the R channel original image and the B channel original image is balanced , while the brightness of the original image of the G channel is obviously unbalanced, such as figure 1 As shown, the brightness on the right is significantly higher than that on the left, so the brightness of the original image of the G channel needs to be adjusted;
[0040] S03. The fundus image except for the black background in the original image of G channel is the original effective image, and the resolution of the original image of G channel is set to W×...
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The invention discloses a method for balancing the brightness of an eye fundus image. B three channels, obtain the original image of channel G of the fundus mask image, the fundus image except the black background in the original image of G channel is the original effective image, divide the original image of G channel into columns, and calculate the original image of each column of the original effective image. Grayscale mean, obtain the original grayscale mean Q of the original effective image, obtain the target grayscale mean M, and obtain the adjustment multiple N of any column image i , equalize each pixel in each column of the original effective image, obtain the gray value of each pixel in the equalized effective image, and obtain the G channel equalized image according to the equalized effective image, so as to obtain the fundus image after brightness equalization.
Description
technical field [0001] The invention belongs to the technical field of medical image processing, and in particular relates to a method for balancing the brightness of a fundus image. Background technique [0002] A clear fundus image should have clear blood vessels and balanced image brightness. However, due to the uneven interference of the reflection of the fundus tissue during the shooting, the brightness of the image is uneven, and the edge brightness is bright, which cannot reflect the characteristics of the patient's fundus well. At present, pictures with balanced brightness can be taken by expensive fundus equipment, but the expensive fundus equipment has high usage cost and maintenance cost, resulting in high detection cost. Some manufacturers try to improve the brightness balance of fundus photos by adjusting the optical system or mechanical structure of ophthalmic equipment, but these require a lot of time and cost. SUMMARY OF THE INVENTION [0003] In order to...
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IPC IPC(8): G06T5/00
CPCG06T2207/10004G06T2207/10024G06T2207/30041G06T5/90
Inventor 蔡鸣庄一
Owner 杭州瞳创医疗科技有限公司