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Method for rapidly segmenting fundus optic disc based on multiple circles

A video disk, fast technology, applied in the computer field, can solve problems such as high computational complexity, and achieve the effect of improving speed and accuracy

Active Publication Date: 2018-11-20
JIANGNAN UNIV
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Problems solved by technology

The characteristic of this type of algorithm is to iteratively find the edge position of energy balance, so the computational complexity is relatively high, and the average processing time of each image is more than ten seconds or even several minutes

Method used

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  • Method for rapidly segmenting fundus optic disc based on multiple circles
  • Method for rapidly segmenting fundus optic disc based on multiple circles
  • Method for rapidly segmenting fundus optic disc based on multiple circles

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Embodiment Construction

[0065] Specific embodiments of the present invention will be described in detail below in combination with technical solutions and accompanying drawings.

[0066] figure 1 It is a frame diagram of the present invention, and the process of processing mainly includes two major processes: accurately locate the center of the optic disc and split the optic disc quickly:

[0067] Step 1, determine the optic disc center based on high brightness and blood vessel characteristics;

[0068] 1.1 Threshold segmentation of color retinal images

[0069] 1% of the entire fundus retinal image is used as the selection threshold of the number of pixels to obtain discrete high-brightness areas; the specific steps are as follows:

[0070] 1) Statistics the distribution of the gray histogram of the normalized green channel of the retinal image, and arrange them in reverse order to obtain the set of gray levels T={t 1 ,t 2 ,...,t n} and the frequency set of gray-level occurrences Among them, ...

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Abstract

The present invention relates to the technical field of computers and particularly relates to a method for rapidly segmenting a fundus optic disc based on multiple circles. The method comprises a stepof (1) determining a disc center based on high brightness and blood vessel characteristics including the steps of (1.1) color retinal image threshold segmentation, (1.2) candidate center marking and(1.3) positioning to a disc center, and a step of (2) the segmentation of the optic disc based on a multi-circle minimum convex hull operation including the steps of (2.1) morphological removal of blood vessels by using an expansion operation, (2.2) Hough circle transformation, and the segmentation of an optic disc area after the expansion of the optic disc by using canny operator double thresholds to obtain a binarized edge image E, and (2.3) a multi-circle minimum convex hull operation. The method for segmenting the optic disc by the multiple circles is used, the convex hull operation is carried out on a plurality of circles detected inside the optic disc, and the speed and precision of the segmentation can be effectively improved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method for quickly segmenting the fundus optic disc based on multi-circles. Background technique [0002] Fluoroglaucoma and diabetic retinopathy can be reflected by the optic disc, which has the characteristics of high brightness, approximate ellipse outline, and concentrated internal blood vessel distribution. Through one or more of these features, the region of the optic disc can be precisely positioned, and then the optic disc can be divided. [0003] Among the positioning methods, the main one is based on the high brightness characteristic of the optic disc. A typical algorithm is the algorithm proposed by Li. He first proposed that the number of the brightest pixels in the retinal image accounts for 1% of the entire retinal image. By extracting these candidate points and clustering these candidate points, a larger one is selected. The connected area is used as the can...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/12G06T7/136G06T7/181
CPCG06T7/0012G06T2207/10004G06T2207/10024G06T2207/20036G06T2207/30041G06T7/12G06T7/136G06T7/181
Inventor 吴鑫鑫肖志勇刘辰刘徐
Owner JIANGNAN UNIV
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