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Optic disc positioning method for retina image

A positioning method and retinal technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as interference, achieve accurate positioning, accurate disk positioning, and remove interference

Inactive Publication Date: 2014-08-06
SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
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Problems solved by technology

[0003] The main purpose of the present invention is to provide a retinal image optic disc positioning method to solve the problem that the optic disc positioning is easily disturbed by various lesions and other noises in the background, and to improve the accuracy and speed of the optic disc positioning in complex backgrounds

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  • Optic disc positioning method for retina image
  • Optic disc positioning method for retina image
  • Optic disc positioning method for retina image

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Embodiment Construction

[0039] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0040] refer to figure 1 , in some embodiments, the optic disc localization method of the retinal image mainly includes the following steps.

[0041] 1. Remove interference from bright lesions

[0042] Since both bright lesions and optic discs in retinopathy appear as bright yellow plaques, the positioning of the optic disc is easily disturbed by bright lesions. In the embodiment, the interpolation algorithm is used to quickly and effectively erase the bright plaques in the background while retaining the characteristics of blood vessels in the optic disc, so as to remove the interference of the bright lesions in the retinal image on the positioning of the optic disc, and ensure that the blood vessels in th...

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Abstract

The invention discloses an optic disc positioning method for a retina image. The optic disc positioning method for the retina image comprises the following steps that (a) bright plaques in the background are erased, and meanwhile blood vessel features are reserved; (b) candidate positions of the center of the optic disc are determined based on blood vessel convergence tendency features; (c) the finial position of the center of the optic disc is determined from the candidate positions of the center of the optic disc based on blood vessel direction features. The optic disc positioning method for the retina image can solve the problem that the positioning of the optic disc is prone to interference brought by various lesions and other noise in the background, and the accuracy and the speed of the positioning of the optic disc under the complex background can be improved.

Description

technical field [0001] The invention relates to an optic disc positioning method of a retinal image. Background technique [0002] Based on the location of the physiological features of the retinal image, including optic disc location, blood vessel location, etc., the accuracy of location will largely affect the efficiency and accuracy of the subsequent lesion identification process corresponding to the location of the physiological feature. At present, the research on the optic disc localization method mainly focuses on finding an image feature that can have a large difference in performance between the optic disc and the background interference target. The more effective features proposed so far include optic disc gray distribution features, optic disc geometry features, optic disc training sample statistical features, and so on. The algorithm based on these feature analysis can better locate the optic disc when the background is not too complicated, especially in retinal...

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Application Information

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IPC IPC(8): G06T7/00G06K9/00
Inventor 李钦卢瑞祥周迎春李名兆
Owner SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
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