Anisotropic External Force Field for Active Contour Based on Perona-Malik Model
Shigang Liu · Jisuanji gongcheng · 2007
The Perona-Malik model is a classical method of anisotropic removing noises.It has the advantage of remaining the edge map of image.The negative gradient of restored image by Perona-Malik model is defined as external forces,and the segmentation results that affect active contour model are studied.Accordingly,an external force field for active contour model——PMF is presented.Theoretical analysis and experimental results show that PMF can retain the edge information of image and enter the edge’s concaves entirely.PMF has large capture range with few restrictions to initial curves.Moreover,because PMF is derived from Perona-Malik,it is robust to the noise.