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MODIFIED POINTWISE SHAPE-ADAPTIVE DCT FOR HIGH-QUALITY DEBLOCKING OF COMPRESSED IMAGES

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Figure

Fig.  2.  Illustration  of  the  shape-adaptive  DCT  transform  and  its  inverse.
Fig. 4. The anisotropic neighborhood is constructed as the polygonal hull of  the adaptive-scale kernels' supports
Figure 7: Details of the JPEG-compressed Lena (Q=15, PSNR=31.95dB) and  Pointwise SA-DCT estimate (PSNR=33.2144dB) and of the corresponding  modified  Pointwise  SA-DCT  estimate  (PSNR=33.2148dB)
Table 1: PSNR (dB) comparison table for restoration from B-DCT quantization for three different quantization matrices

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