Fast Rotational Sparse Coding

12 Jun 2018Michael T. McCannVincent AndrearczykMichael UnserAdrien Depeursinge

We propose an algorithm for rotational sparse coding along with an efficient implementation using steerability. Sparse coding (also called dictionary learning) is an important technique in image processing, useful in inverse problems, compression, and analysis; however, the usual formulation fails to capture an important aspect of the structure of images: images are formed from building blocks, e.g., edges, lines, or points, that appear at different locations, orientations, and scales... (read more)

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