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Selective Data Pruning-Based Compression Using High-Order Edge-Directed Interpolation

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5 Author(s)
Vo, D.T. ; Digital Media Solutions Lab., Samsung Inf. Syst. America, Irvine, CA, USA ; Sole, J. ; Peng Yin ; Gomila, C.
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This paper proposes a selective 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 back to their original size by an edge-directed interpolation method. The data pruning phase is optimized to obtain the minimal distortion in the interpolation phase. Furthermore, a novel high-order interpolation is proposed to adapt the interpolation to several edge directions in the current frame. This high-order filtering uses more surrounding pixels in the frame than the fourth-order edge-directed method and it is more robust. The algorithm is also considered for multiframe-based interpolation by using spatio-temporally surrounding pixels coming from the previous frame. Simulation results are shown for both image interpolation and coding applications to validate the effectiveness of the proposed methods.

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Image Processing, IEEE Transactions on  (Volume:19 ,  Issue: 2 )