Fig. 1. All prior shapes

Fig. 2. Original figure of bone. (a) Normalized original figure; (b) figure with Gaussian white noise and occlusion

Fig. 3. Segmentation process of proposed model. (a) Original contour; (b)-(e) evolution processing

Fig. 4. Partial prior shapes

Fig. 5. (a) Original figure of kidney; (b) sparse coefficient; (c) segmentation result

Fig. 6. Segmentation results. (a) Original image of the kidney; (b) Chan-Vese model; (c) ESC model; (d) proposed model

Fig. 7. Segmentation results. (a) Original image of the liver; (b) Chan-Vese model; (c) DG-SSR model; (d) proposed model