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In this letter we propose to denoise digital color images via an improvedgeometric diffusion scheme. By introducing edges detected from all three colorchannels into the diffusion the proposed scheme avoids color smearingartifacts. Vector valued diffusion is used to control the smoothing and thegeometry of color images are taken into consideration. Color edge strengthfunction computed from different planes is introduced and it stops thediffusion spread across chromatic edges. Experimental results indicate that thescheme achieves good denoising with edge preservation when compared to otherrelated schemes.

Color image denoising by chromatic edges based vector valued diffusion