An optic disc positioning method and a storage device based on main blood vessel fitting

A positioning method and storage device technology, applied in the field of image analysis, can solve the problems of low accuracy, high complexity, and poor practicability, and achieve the effects of high accuracy, low complexity, and strong practicability.

Pending Publication Date: 2018-12-28
FUZHOU YIYING HEALTH TECH CO LTD
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Problems solved by technology

[0005] Therefore, it is necessary to provide an optic disc positioning method based on main blood vessel fitting to solve the problems that the existing optic disc positioning technology is either not accurate, high in complexity, time-consuming, and poor in practicability

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  • An optic disc positioning method and a storage device based on main blood vessel fitting
  • An optic disc positioning method and a storage device based on main blood vessel fitting
  • An optic disc positioning method and a storage device based on main blood vessel fitting

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Embodiment Construction

[0031] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0032] see figure 1 , first explain some nouns in this embodiment as follows:

[0033] Optic disc: The full name is the optic disc, also called the optic nerve head. There is a light red disc-shaped structure with a diameter of about 1.5 mm and a clear boundary at about 3 mm from the macula to the nasal side of the retina. It is called the optic disc, or optic disc for short.

[0034] Otsu algorithm: also known as the maximum inter-class variance method, also known as: OSTU, is an efficient algorithm for binarizing images proposed by the Japanese scholar OTSU in 1979. Mainly use the threshold to divide the original image into foreground and background images. Foreground: Use n1, csum, m1 to represent the number of foreground points,...

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Abstract

The invention relates to the field of image analysis, in particular to an optic disc positioning method and a storage device based on main blood vessel fitting. The optic disc positioning method basedon the main blood vessel fitting comprises the following steps: the image of the fundus to be examined is preprocessed; the binary angiogram is extracted from the preprocessed fundus image by a Otsualgorithm, and the main blood vessel is obtained by eroding the binary angiogram by morphological method; the main blood vessel is calculated by parabola fitting, and the center of optic disc was located according to the result of calculation. The whole method has low complexity, small time consuming and strong practicability, and even if the optic disc appearance changes due to the lesion, or there are some large areas of bright lesion interference, it will not affect the localization results, and the whole method has high efficiency and high accuracy.

Description

technical field [0001] The invention relates to the field of image analysis, in particular to an optic disc positioning method and storage device based on main blood vessel fitting. Background technique [0002] The automatic analysis of retinal fundus images has been widely used in the auxiliary diagnosis of various systemic diseases related to ophthalmology, such as diabetes, hypertension, kidney disease and neurological diseases. In a normal color fundus image, the macula, fovea, optic disc and vascular network are the four main features that can be observed in the fundus. The optic disc is one of the most important physiological structures on the retinal fundus image, and its location is of great importance for the diagnosis of fundus lesions. very important meaning. At the same time, since there is a fixed distance between the optic disc and the macular area, the position information of the center of the optic disc can be used as prior knowledge to assist the selection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/32G06T7/155
CPCG06T7/155G06T2207/30101G06T2207/30041G06V40/193G06V10/25
Inventor 余轮林嘉雯曹新容薛岚燕
Owner FUZHOU YIYING HEALTH TECH CO LTD
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