Fig. 2.
Examples of local surface geometry oriented axes and their resulting locally-oriented image patches. We compare the oriented patches to their corresponding canonical image patches oriented along the image axes. The segmentation surface S and the local surface geometry define a local orthonormal basis for the oriented image patch specified by the normal direction n and directions of principal curvature k1, k2. For illustration purposes, we show a large patch size of 33 × 33 × 33 and display the central slice.