Redundancy elimination method and system for capsule endoscope video image

Abstract

The invention discloses a redundancy elimination method and system for a capsule endoscope video image. The system includes an initialization module, an NCC function calculation module, a first judgment processing module, a second judgment processing module and a third judgment processing module. The method includes: taking out N non-repeated frames after a key frame and adopting an NCC function to calculate the key frame and the N non-repeated frames one by one; judging whether the NCC function value is larger than a threshold, if so, deleting corresponding non-repeated frames; if not so, reserving the non-repeated frames; judging whether the taken-out N non-repeated frames are all deleted, if so, keeping the key frame unchanged and if not so, using a non-repeated frame closest to the key frame as a new key frame; and judging whether the number of current non-repeated frames is smaller than N, if so, ending the process. The redundancy elimination method and system for the capsule endoscope video image is capable of solving a problem of video redundancy resulted from front and back movements of the capsule and improving the identification rate of the video redundancy. The method and system are widely applied to the field of WCE (wireless capsule endoscope) video image redundancy processing.

Description

technical field [0001] The invention relates to a video image processing technology, in particular to a method and system for removing redundancy of a capsule endoscope video image. Background technique [0002] Explanation of technical terms: [0003] NCC: Normalized Cross Correlation [0004] For Wireless Capsule Endoscopy (WCE) technology, it is to use a capsule pill equipped with an ultra-small camera to obtain video images of the entire human digestive system, and within 8-12 hours after the patient takes the capsule pill and starts transmitting pictures , it can send 30,000 to 50,000 frames of video images. At present, the main disadvantage of WCE inspection is that, due to the excessive number of frames of WCE video images, WCE clinicians usually need to spend 2-3 hours to check the entire WCE video, which will not only consume too much time, but also cause The doctor's eyes are tired and the ability to identify lesions is reduced, which leads to misdiagnosis and m...

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Problems solved by technology

At present, only one related invention patent has been found in China regarding the redundant identification and elimination of capsule endoscope video - "Automatic elimination method for capsule endoscope redundant image data", but this method only considers The video redundancy problem of two adjacent frames

Since the WCE examination mainly relies on the peristalsis of digestive organs such as the stomach to move the capsule, and through clinical findings, there will be many cases where the capsule moves backwards during the movement of the capsule, which will lead to the generation of a large number of video redundant images. For such video redundant images, the above-mentioned method that only considers the video redundancy of two adjacent frames cannot identify and eliminate them at all. Therefore, it can be seen that people should provide a solution as soon as possible that can well solve the problem caused by capsule backwards. A method for the problem of generating a large number of video redundant images due to motion

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