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A Method of Optic Disc Region Location Based on Vascular Convergence

A positioning method and a video disc technology, which are applied in the field of image processing, can solve problems such as inability to accurately locate a video disc, and achieve the effects of overcoming the loss of video disc brightness, improving speed, and achieving good effects.

Active Publication Date: 2019-12-10
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to interference factors such as uneven illumination, lesions, and vascular interference, these methods cannot accurately locate the optic disc

Method used

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  • A Method of Optic Disc Region Location Based on Vascular Convergence
  • A Method of Optic Disc Region Location Based on Vascular Convergence
  • A Method of Optic Disc Region Location Based on Vascular Convergence

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Embodiment Construction

[0057] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0058] Such as figure 1 As shown, this embodiment provides a method for locating the optic disc region based on blood vessel convergence, which is used to locate the optic disc region of the fundus image, and the method includes the following steps:

[0059] 1) Utilize the least squares classifier to segment the initial optic disk area of ​​the fundus image;

[0060] 2) Calculate the center of the initial optic disc area segmented in step 1) according to the convergent position of blood vessels;

[0061] 3) Calculate the point with the largest gradient value in each direction of the...

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Abstract

The invention relates to a method for locating the optic disk region based on blood vessel convergence, which is used for locating the optic disk region of the fundus image. Calculate the center of the segmented initial optic disc area by calculating the position; calculate the point with the largest gradient value in each direction of the center of the initial optic disc area to form a point set, and use the fast ellipse fitting algorithm to process the point set to obtain the border of the optic disc area and determine the optic disc area. Compared with the prior art, the present invention has the advantages of strong robustness, ability to overcome various interference factors, accurate positioning of the center of the optic disk area, and clear positioning.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for locating an optic disk region based on blood vessel convergence. Background technique [0002] The optic disc has obvious features in the fundus image: (1) usually appears as a nearly circular yellow or white bright spot; (2) blood vessels extend from the center of the optic disc; (3) the extending blood vessels have similar directions . [0003] In 1997, in the "Automatic image analysis of fundusphotograph" published by Zhengliu et al., 2% of the maximum brightness value in the fundus image was selected as the threshold, and the remaining area was the position of the optic disc; in the "Optic disc segmentation" published by Chrastek et al. In retina images", select the point with the largest average brightness value in the image as the center of the optic disc. These two methods simply use the feature of the brightest optic disc region, and when there are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/34G06K9/40G06K9/32
CPCG06V40/197G06V10/245G06V10/30G06V10/267
Inventor 盛斌邢思凯
Owner SHANGHAI JIAOTONG UNIV