Alignment by phase of vertical coefficients in SA-DCT
Emílio Carlos Acocella, Abraham Alcaim · IEEE Signal Processing Letters · 2001
In this paper, we introduce a formula to align the vertical coefficients of the SA-DCT (shape-adaptive discrete cosine transform). Instead of grouping coefficients with the same index as proposed by Sikora and Makai (1995), the new method employs an alignment by phase strategy. Experimental results are given for both synthetic segments and real testing image sequences.