Fig. 9From: A de-noising method based on L0 gradient minimization and guided filter for ancient Chinese calligraphy works on stelesComparison of our method with the L0 gradient minimization algorithm [13] and the block-matching 3D filtering (BM3D) algorithm [17]. a Original images. b Results with the L0 gradient minimization algorithm [13]. c The block-matching 3D filtering (BM3D) algorithm [17]. d Results with our methodBack to article page