Fig. 1
From: A Preprocessing Algorithm Based on Heterogeneity Detection for Transmitted Tissue Image

Two Laplacian filter masks. (a) is a discrete Laplacian mask corresponding to Equation 7, and (b) is an extended mask of (a)
From: A Preprocessing Algorithm Based on Heterogeneity Detection for Transmitted Tissue Image
Two Laplacian filter masks. (a) is a discrete Laplacian mask corresponding to Equation 7, and (b) is an extended mask of (a)