In this article. we propose a novel group-based sparse representation (GSR) model for restoring color images in the presence of multiplicative noise. This model consists of a convex data-fidelity term. and two regularizations including GSR and saturation-value-based total variation (SVTV). https://www.chincoponydrillteam.com/product-category/beauty-skincare-food-and-health-care-products/