Method for extracting cornea contour through cornea dynamic deformation video based on Otsu algorithm

A technology of dynamic deformation and Otsu algorithm, applied in the field of image processing, can solve the problems of undiscovered patent documents and inability to meet accuracy, and achieve the effect of improving accuracy and integrity

Active Publication Date: 2022-05-13
TIANJIN EYE HOSPITAL OPTOMETRIC DEPT +2
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Problems solved by technology

However, these algorithms cannot meet the requirements of accuracy when applied to the corneal contour extraction process of corneal...

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  • Method for extracting cornea contour through cornea dynamic deformation video based on Otsu algorithm
  • Method for extracting cornea contour through cornea dynamic deformation video based on Otsu algorithm
  • Method for extracting cornea contour through cornea dynamic deformation video based on Otsu algorithm

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Embodiment Construction

[0049] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0050] A method for extracting corneal contour from video of corneal dynamic deformation based on Otsu algorithm, such as Figure 1 to Figure 5 shown, including the following steps:

[0051] Step 1, preprocessing the corneal contour image;

[0052] The specific method of the step 1 is: the corneal dynamic deformation video is divided into frames, and then the corneal contour image is subjected to image preprocessing such as impurity removal, gray scale and image noise reduction;

[0053] In this embodiment, the color image is converted into a grayscale image, which greatly reduces the range of color changes, greatly reduces the amount of subsequent calculations on the image, and can still represent the distribution of the color and brightness levels of the entire image.

[0054] H=0.299R+0.587G+0.144B (1)

[0055] Add Gaussian filtering for imag...

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Abstract

The invention relates to a method for extracting a cornea contour from a cornea dynamic deformation video based on an Otsu algorithm. The method comprises the following steps: step 1, preprocessing a cornea contour image; step 2, carrying out image segmentation on the image preprocessed in the step 1 by adopting an Otsu algorithm, and introducing mathematical morphological operation to reduce the possibility of occurrence of holes and fine noise; and step 3, calculating an image gradient by using a Gaussian function, and detecting the edge of the image by setting double thresholds. According to the method, the accuracy and integrity of the extracted cornea contour can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a method for extracting corneal contours from corneal dynamic deformation videos, in particular to a method for extracting corneal contours from corneal dynamic deformation videos based on the Otsu algorithm. Background technique [0002] At present, contour extraction technology is widely used in image processing. After collecting a large amount of image data, it is necessary to describe the characteristics of specific objects in the image, and detect, identify and classify specific objects according to the contour feature information of the image. Therefore, how to extract the outline of a specific object from the image is an urgent problem to be solved. [0003] In the past few years, a large number of researchers have designed various schemes to solve the problem of object contour extraction. Saber M S et al proposed a new scheme based on OTSU to design a computer-ai...

Claims

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Application Information

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IPC IPC(8): G06T7/13G06T7/12G06T7/136G06T5/00
CPCG06T7/13G06T7/12G06T7/136G06T5/002G06T2207/10016G06T2207/30041
Inventor 王雁李康生李柯迪陈萱刘艳汪日伟谭左平江欣蔚尉金行吴浩达邹昊翰刘凤连
Owner TIANJIN EYE HOSPITAL OPTOMETRIC DEPT
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