Method and system for extracting clear image frame from recorded fundus video

A technology for clear images and video recording, which is applied in image enhancement, image analysis, image data processing, etc. It can solve the problems of slight shake of the shooting frame and affect the quality of shooting images, so as to improve the operation fluency, reduce manual intervention, and improve imaging quality effect

Active Publication Date: 2017-12-01
南京泰立瑞信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"In actual use, it is found that when one hand holds the above-mentioned shooting frame and the other hand clicks th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The method of extracting clear image frames from the recorded fundus video in the present invention needs to prepare the pathological video about the fundus of the patient recorded by the shooting device before implementation. The pathological video file is called the recorded video file.

[0052]When the method is implemented, the effective image area of ​​each frame image in the recorded video file is determined first, and the scheme for determining the effective image area can be any one in the prior art. For example, due to the use of a light tube or correction of distortion, a circular central image area and a black edge around the circular central image area are formed in each frame of image, then the black edge can be ignored by a mature algorithm Or cut off to determine the effective image area. Alternatively, the effective image area may also be determined by shrinking inward by preset pixels from the edge of each frame of the original image.

[0053] The purp...

Embodiment 2

[0069] This embodiment provides a system for extracting clear image frames from the recorded fundus video, which contains the method in Embodiment 1, or facilitates the implementation of the method in Embodiment 1, including:

[0070] A video file storage unit is suitable for storing the image data information of each frame of the recorded video.

[0071] A cache unit.

[0072] A processor unit adapted to perform the following operations and calculations:

[0073] From the video file storage unit according to the time axis of the recorded video file, read each frame of image data information sequentially, and after reading, convert each pixel point in the effective image area in the current frame image into YUV color Domain three-channel description form, and screen out qualified pixels. The specific processor unit judges whether the Y, U, and V channel values ​​of each pixel in the effective image area of ​​the current frame image fall within the preset Y, U, and V value in...

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PUM

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Abstract

The invention relates to a method and a system for extracting a clear image frame from a recorded fundus video. According to the invention, each frame of the image of a video file is subjected to YUV treatment, and then the characteristic value of each pixel point is calculated. Meanwhile, a certain frame of the image with a maximum effective contrast average value is found, and finally the frame of the image is outputted. The method and the system can be applied to various fundus image acquisition equipments. A collector records a video which is directly captured by a camera shooting device during the collection process. For example, the entry pupil of an acquisition equipment is attempted to be aligned with the pupil of a to-be-collected person during the preparation stage, and a plurality of times of alignments are conducted during the collection process or high-quality fundus images are successfully captured momently or continuously. The shooting angle is coordinated and adjusted according to the to-be-collected person during the collection interval, and the transition stage is completed after the collection. The collector does not need to carry out manual editing on the video or set software parameters, and then a high-quality fundus image can be obtained after the software processing operation. Moreover, a representative part is further screened out through manual screening so as to be used for clinical diagnosis.

Description

technical field [0001] The invention relates to the field of pathological image processing, in particular to a method and system for extracting clear image frames from recorded fundus video. Background technique [0002] The part of the eye seen through the pupil, the inner lining of the eyeball, including the retina, optic disc, and macula. Due to the transparency of the retina, the term also includes Bruch's membrane and choroid. The fundus is the only part of the human body that can directly see the microcirculation of blood circulation. Diseases of the fundus, including diseases of the retina, optic disc and choroid, are commonly referred to as fundus diseases. Many fundus diseases are closely related to changes in the vitreous body, so vitreous body lesions are also included. [0003] At present, doctors use the traditional direct ophthalmoscope to observe the patient's fundus lesions, including the lighting system and the observation system. Its basic principle is t...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T7/00
CPCG06T5/003G06T5/006G06T7/0012G06T2207/10016G06T2207/30041
Inventor 马朔昕
Owner 南京泰立瑞信息科技有限公司
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