Title :
Color image restoration by quaternion diffusion based on a discrete version of the topological derivative
Author_Institution :
Dept. of Comput. Sci., Baoji Univ. of Arts & Sci., Baoji, China
Abstract :
A new method for color image denoising is presented. This work considers three color channels as a whole by using quaternion diffusion. We use concept of topological sensitivity analysis. The diffusion coefficients are computed by a proposed cost function of the Topological Derivative. Finally, the effectiveness of this method for color image restoration is verified by several numerical experiments. This method is also suitable for gray image denoising by complex diffusion.
Keywords :
image colour analysis; image denoising; image restoration; color channels; color image denoising; color image restoration; complex diffusion; cost function; diffusion coefficients; numerical experiments; quaternion diffusion; topological derivative; topological sensitivity analysis; Color; Equations; Filtering; Image color analysis; Mathematical model; Noise reduction; Quaternions; Image filtering; Topological Derivative; color image denoising; nonlinear diffusion; quaternion diffusion;
Conference_Titel :
Image and Signal Processing (CISP), 2014 7th International Congress on
Conference_Location :
Dalian
DOI :
10.1109/CISP.2014.7003777
