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164 8 Directional DCT Transform
left block equal to mode 1 and that of the right block equal to mode 2 is shown in
Figure 8.6a. Along with the direction of the left block, each connection will be linked
to one integer pixel on the first column of the right block. Just as the motion threading
proposed by Xu et al. [74], we call the connection a directional thread. In this case,
there only exists the one-to-one mapping during the transition. It is easy to perform
the proposed directional DCT-like transform ...