Ayman El-Baz1, Seniha E. Yuksel1, Hongjian Shi1, Aly A. Farag1, Mohamed A. El-Ghar2, Tarek Eldiasty2, Mohamed A. Ghoneim2

1Computer Vision and Image Processing Lab, University of Louisville2Mansoura University, Urology and Nephrology Center

2D and 3D Shape Based Segmentation Using Deformable Models

#S32

Prior Shape

Current Gray Level

Deformable Model

1 1 1( ( )) ( | ) ( | )ext s gp d k p q k

2 2 2( ( )) ( | ) ( | )ext s gp d k p q k

2 1ext ext

Assuming object:

Assuming background:

Evolve if:Signed distance map and gray level densities are estimated with our modified EM algorithm

Results & Validation

Average shape by FEM

Result at-1.9dB SNR