Direction-Adaptive Partitioned Block Transform for Color Image Coding

@article{Chang2010DirectionAdaptivePB,
  title={Direction-Adaptive Partitioned Block Transform for Color Image Coding},
  author={Chuo-Ling Chang and Mina Makar and Sam S. Tsai and Bernd Girod},
  journal={IEEE Transactions on Image Processing},
  year={2010},
  volume={19},
  pages={1740-1755}
}
The direction-adaptive partitioned block transform (DA-PBT) is proposed to exploit the directional features in color images to improve coding performance. Depending on the directionality in an image block, the transform either selects one of the eight directional modes or falls back to the nondirectional mode equivalent to the conventional 2-D DCT. The selection of a directional mode determines the transform direction that provides directional basis functions, the block partitioning that… 

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