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Shape descriptors play an important role in various computer vision tasks. Many existing descriptors are typically derived from pair-wise measures, such as distances and angles, which may vary with severe geometrical deformations including affine and projective transformations. In this paper, we propose a new shape descriptor from a newly developed projective invariant, the characteristic number (CN)...
Super-resolution reconstruction of face image is the problem of reconstructing a high resolution face image from one or more low resolution face images. Assuming that high and low resolution images share similar intrinsic geometries, various recent super-resolution methods reconstruct high resolution images based on a weights determined from nearest neighbors in the local embedding of low resolution...
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