Abstract:

Facing the edge detection problems lying in image processing, a novel  algorithm of image edge detection is put forth based on wavelet transform and curvelet transform. Firstly, we process the original image with the method of wavelet transformation and obtain a wavelet edge image. Then we achieve a curvelet edge image by processing the original image with the method of curvelet transformation and the Canny operator. Finally, the final edge image is acquired by merging the wavelet edge image and the curvelet edge image based for the adaptive fusion algorithm on the edge intensity in wavelet transform window. The algorithm combines the advantage of wavelet transform in describing image detail characteristics and the advantage of curvelet transform in processing curve or straight line edge features. It fully characterizes the details and texture information of the edge image, and improves image clarity. Simulation results verify the effectiveness of the algorithm.

Key words: curvelet transform;wavelet transform;edge detection;adaptive fusion algorithm