Color image enhancement techniques in Wireless Capsule Endoscopy

Abstract

Wireless Capsule Endoscopy (WCE) is available since 2001 and has been established as one of the principal approaches to examine the entire GI tract particularly the small bowel. WCE images are dark and difficult to visualize for diagnosis by physicians. Image enhancement methods to improvise the contrast of the images maybe adopted. The experimental results of various image enhancement techniques such as histogram equalization, Multi Scale Retinex and Contrast limited Adaptive Histogram Equalization techniques were being compared and analysed. Image enhancements techniques were applied for both on color image and gray scale image. The experiment results suggests that CLAHE provides better contrast improvement of WCE images, while Multi Scale Retinex provides better human visualization. The proposed future work is in progress in image fusion process; adapting both CLAHE and MSRCR image enhancement techniques.