Color edge detection using multiscale quaternion convolution
This article presents a novel color edge detection algorithm based on quaternion convolution. A set of multiscale quaternion masks are presented, and the filtered results are multiplied at adjacent scales using dot product to enhance the edge structures while diluting noise. Experimental results show that the proposed method is efficient and robust for color images.  2010 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 20, 354358, 2010
edge detection multiscale quaternion convolution dot product color image