Improved image edge detection algorithm based on Canny operator

Abstract

In order to solve the problem of missing edge and feigned edge using Gauss filter with the canny operator,an improved edge detection algorithm is proposed.It replaces Gauss filter with the wavelet threshold filter whose threshold obtained by the GCV theory to wipe off the image noise effectively,computes the magnitude and the direction,and detects and connects edges of the image in use of non-maxima suppression and hysteresis threshold.The experiment shows that the improved algorithm can increase veracity effectively and obtain better edge detection result.