DCT Coding of nonrectangularly sampled images

Cataloged from PDF version of article.Discrete cosine transform ( DCT) coding is widely used for compression of rectangularly sampled images. In this letter, we address efficient DCT coding of rectangularly sampled images. To this effect, we discuss an efficient method for the computation of the DCT on nonrectangular sampling grids using the Smith-normal decomposition. Simulation are provided