Image Coding on Quincunx Lattice with Adaptive Lifting and Interpolation
DCC '07 Proceedings of the 2007 Data Compression Conference
Can Lower Resolution Be Better?
DCC '08 Proceedings of the Data Compression Conference
Lapped transform via time-domain pre- and post-filtering
IEEE Transactions on Signal Processing
Adaptive downsampling to improve image compression at low bit rates
IEEE Transactions on Image Processing
Image Compression With Edge-Based Inpainting
IEEE Transactions on Circuits and Systems for Video Technology
Efficiency of shape-adaptive 2-D transforms for coding of arbitrarily shaped image segments
IEEE Transactions on Circuits and Systems for Video Technology
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This paper proposes an image coding method based on adaptive downsampling which not only uses the pixel redundancy but also considers visual redundancy. At the encoder side, codec adaptively chooses some smooth regions of the original image to downsample, and then overlapped transform with selectivity, block DCT and adaptive-shape DCT (SA-DCT) are used against the image after being downsampled. For the incomplete transformed image, OB-SPECK is adopted to code. At the decoder side, in order to reduce the computational complexity, we use the simple cubic interpolation which not only is very suitable to the downsampled regions but also enhances greatly the real time of this coding system. Experimental results shows the proposed method outperforms JPEG2000, SPECK, SPIHT, and LT+SPECK at low bit rates.