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This paper proposes a data pruning-based compression scheme to improve the rate-distortion relation of compressed images and video sequences. The original frames are pruned to a smaller size before compression. After decoding, they are interpolated to their original size by an edge-directed interpolation. The data pruning is optimized to obtain the minimal distortion in the interpolation phase. Furthermore,...
Focusing region selection is an important part in autofocusing algorithm, which directly influences the accuracy, unimodality and stability of the sharpness function curve. Two criteria for focusing region selection are presented. Then, a novel region selection method based on edge mask is proposed. The edge mask is obtained by Canny detector, morphological image processing and central region selecting...
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