Retina image enhancement algorithm based on multiple scales and multiple directions

An image enhancement and retinal technology, applied in image enhancement, image data processing, calculation, etc., can solve problems such as not taking into account changes in blood vessel width

Inactive Publication Date: 2015-06-24
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

Although this method uses multi-directional technology to solve the problem of changes in the direction of blood vessels, it also does not take into account the problem of changes in the width of blood vessels.

Method used

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  • Retina image enhancement algorithm based on multiple scales and multiple directions
  • Retina image enhancement algorithm based on multiple scales and multiple directions
  • Retina image enhancement algorithm based on multiple scales and multiple directions

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] The purpose of the present invention is to provide a retinal image enhancement algorithm based on multi-scale and multi-direction, which solves the two problems of changes in the width and direction of blood vessels, and uses the multi-scale Hessian matrix to enhance the blood vessels within a specified width range in the retinal image. At the same time, the blood vessels in 12 different directions in the retinal image are enhanced by using multi-directional two-dimensional matched filtering, and then the above two enhancement results are fused to achieve the final image enhancement.

[0037] figure 1 It is a flow c...

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Abstract

The invention discloses a retina image enhancement algorithm based on multiple scales and multiple directions. The method comprises the steps that input original RGB retina images are preprocessed, the original RGB retina images are broken up into images of red, green and blue three-channel images, and green channel images of the retina images are extracted; the green channel images of the retina images are subjected to multi-scale Hessian matrix filtering, and multi-scale enhancement images are obtained; the green channel images of the retina images are subjected to multi-direction two-dimension matching filtering, and multi-direction enhancement images are obtained; and the multi-scale enhancement images and the multi-direction enhancement images are subjected to fusion, and the final retina enhancement image results are obtained. Blood vessels in an appointed width range in the retina images are enhanced through a multi-scale Hessian matrix, meanwhile, multi-direction two-dimension matching filtering is used for carrying out enhancement on blood vessels in 12 different directions in the retina images, then the two enhancement results are fused, and accordingly final image enhancement is achieved.

Description

technical field [0001] The invention relates to image segmentation technology, in particular to a retinal image enhancement algorithm based on multi-scale and multi-direction. Background technique [0002] Retinal blood vessels are the only deep microvessels that can be observed without damage in the human body, and their characteristic changes can not only reflect a variety of ophthalmic diseases, but also reflect systemic vascular-related diseases, such as hypertension, diabetes, and arteriosclerosis. Observation and analysis of retinal blood vessel images will provide important basis and help for timely detection and treatment of related diseases. However, due to the influence of retinal vascular structure, imaging environment, equipment and noise, the obtained retinal vascular images are often of poor quality and difficult to be directly used for medical diagnosis. Therefore, retinal images need to be enhanced before use. [0003] The enhancement algorithms of blood ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/50
Inventor 闵锋单玲玉张彦铎李晓林
Owner WUHAN INSTITUTE OF TECHNOLOGY
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