A fast preview restoration algorithm for space-variant degraded images
В. Н. Карнаухов, Vitaly Kober · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2016
The paper deals with restoration of decimated images degraded by space-variant distortions. Such distortions occur in real conditions when the camera in an actual shoot is shaken and rotated in three dimensions while its shutter is open. The proposed method is locally adaptive image restoration in the domain of a sliding orthogonal transform. It is assumed that the signal distortion operator is spatially homogeneous in a small sliding window. A fast preview restoration algorithm for degraded images is proposed. To achieve the image restoration with low resolution at high rate, a fast recursive algorithm for computing the sliding discrete cosine transform with arbitrary step is utilized. The proposed algorithm is tested with spatially nonuniform distortion operators and obtained results are discussed.