Hough Transform for Region Extraction in Color Images

This article aims to propose a method to use the idea of Hough Transform (HT) implemented in grey scale images to color images for region extraction. A region in an image is seen as a union of pixels on several line segments having the homogeneity property. A line segment in an image is seen as a collection of pixels having the property of straight line in Euclidean plane and possessing the same property. The property ’homogeneity’ in a color image is based on the trace of the variance covariance matrix of the colors of the pixels on the straight line. As a possible application of the method, it is used to extract the homogeneous regions in the images taken from the Indian Remote Sensing Satellites.