Edge detection in images using modified bit-planes sobel operator

Abstract

The detection of edges in images is a vital operation with applications in various fields. There are a number of methods developed already for the same. We have developed a ‘global method’ for extraction of edges which is a modification of the existing Sobel operator. We have first extracted the bit planes of each image and have applied the Sobel operator on each bit plane for enhanced results. After this we have recreated the image by adding up the Sobel edge detected planes in their order of importance. This is a fairly simple global method which yields very good results. The computations are simpler and faster as well.