Fast algorithm for discrete cosine transform (DCT)-domain image downsampling using Winograd DCTs
Donyeon Kim, Yoonsik Choe · Optical Engineering · 2003
A fast algorithm for discrete cosine transform (DCT)-domain image resizing is presented. To reduce computations, fast Winograd DCTs are applied to a recently reported image resizing scheme that uses DCT low-pass truncatedapproximation. Our fast algorithm yields significant improvement in computational complexity over the fast algorithm of the reported method.