Abstract
In this work, we propose to improve the performance of the DCT by weighting the DCT matrices with some simple structured orthonormal matrices. The new transform thus generated is called the weighted cosine transform (WCT). This method of modification ensures that fast computational algorithms exist for the WCT. Tests using both a statistical model and real images have shown that the WCT performs better than the DCT. The implementation of an order-N WCT is similar to that of the DCT. The additional computation overhead is 1.5N multiplications and N additions.
Original language | English |
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Pages (from-to) | 178-186 |
Number of pages | 9 |
Journal | Journal of Visual Communication and Image Representation |
Volume | 4 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Jan 1993 |
Externally published | Yes |
ASJC Scopus subject areas
- Signal Processing
- Media Technology
- Computer Vision and Pattern Recognition
- Electrical and Electronic Engineering