Ruixiong Tian, Zhe Xiang, et al.
Qinghua Daxue Xuebao/Journal of Tsinghua University
The Discrete Cosine Transform (DCT) followed by scaling and quantization is an important operation in image processing. Because of the scaling, the DCT itself need not be computed, but rather a scalar multiple of the DCT might do, with appropriate compensation incorporated into the scaling. We present a fast method for computing such scaled output of the 2-dimensional DCT on 8 × 8 points. We also present a similar algorithm for the inverse scaled DCT.
Ruixiong Tian, Zhe Xiang, et al.
Qinghua Daxue Xuebao/Journal of Tsinghua University
John R. Kender, Rick Kjeldsen
IEEE Transactions on Pattern Analysis and Machine Intelligence
Jeong-Ik Lee, G. Klarner, et al.
Proceedings of SPIE - The International Society for Optical Engineering
David A. Harville
Linear Algebra and Its Applications