Wireless capsule endoscopy redundant image screening method based on multi-feature fusion

Abstract

The present invention provides a wireless capsule endoscopy redundant image screening method based on multi-feature fusion. The method comprises the steps of extracting the color feature vector and the texture feature vector of an image through an HSV color feature histogram and a gray level co-occurrence matrix, a step of calculating the color feature normalized mutual information amount of an adjacent image and a texture feature mean square error value as similarity measurement, a step of considering the robustness of the method, a step of proposing the mean value method setting adaptive similarity determination threshold based on a W parameter, a step of dividing an WCE image with certain time correlation and color-texture similarity into a same sub image segment through comparing the similarity measurement value of the adjacent WCE image and a judgment threshold value orderly, and a step of using an adaptive K-means clustering algorithm to carry out key frame extraction on each sub image clip to achieve the purpose of filtering a redundant image. According to the method, the redundant image can be effectively filtered, and thus the efficiency of doctors is improved.

Description

technical field [0001] The invention relates to a wireless capsule endoscope redundant image screening method based on multi-feature fusion, and belongs to the technical field of medical image processing. Background technique [0002] Wireless capsule endoscopy (Wireless Capsule Endoscopy, WCE) is composed of a wireless transmission module and a miniature camera, and is a capsule-shaped medical instrument for non-invasive inspection of human gastrointestinal organs. During the detection of gastrointestinal diseases, WCE relies on the peristalsis of the gastrointestinal tract to take pictures of the inner wall of the human digestive tract, and transmits the pictures to the wireless receiver carried by the patient through the wireless transmitter in the capsule, and finally the doctor receives them wirelessly. Download pictures in browser for browsing diagnosis. Since the micro-camera inside the capsule obtains 480×480-pixel color pictures at a shooting speed of 2-3 frames pe...

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Problems solved by technology

[0007]2) For some continuous WCE images, there are gradient characteristics, and the adjacent WCE images are compared as similar pictures, but the first WCE picture is compared with the Compared with the last WCE picture, it is obvious that there are differences, so the method of directly using the first WCE picture or the last WCE picture as the key frame extraction method will cause some important information to be lost;

[0008]3) The robustness of the redundant frame screening method, because different WCE image sets have different dynamic information changes, if a fixed threshold method is used to judge two The similarity between WCE images will lead to the lack of adaptability of the method, making the robustness of the screening effect poor

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