A Fast Arbitrary Factor Video Resizing Algorithm
Vijaya S. Patil, Rajeev Kumar, Jayanta Mukherjee · IEEE Transactions on Circuits and Systems for Video Technology · 2006
We present a new algorithm for resizing video frames in the discrete cosine transform (DCT) space. We demonstrate that a frame resizing operation can be represented as multiplication by fixed matrices and propose a computation scheme which is applicable to any DCT-based compression method. The proposed approach is general enough to accommodate resizing operations with arbitrary factors conforming to the syntax of 16times16 macroblocks. The approach is shown to possess significant computational gain over the faster known state of the art algorithms while achieving similar picture quality