Deformation robust texture features for polyp classification via CT colonography

In this article, we introduce a deformation independent model to solve the shape and posture changing issue for polyp characterization in computer-aided diagnosis (CADx) via CT colonography. After volumetric data parameterization in a four-dimensional space, the first fundamental form (FFF) is employed to construct the polyp model which contains several excellent properties such as locality, symmetry, orientation robustness, shift and isometric...