Title :
Image coding using weighted cosine transform
Author :
Lo, Kwok-Tung ; Cham, Wai-Kuen
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong
Abstract :
A new orthogonal transform, called weighted cosine transform (WCT), is developed for digital image coding applications. The new transform is characterized. The transform matrix is the weighted version of that in the discrete cosine transform (DCT). Various commonly used criteria based on the one-dimensional and two-dimensional Markov models have shown that the performance of the order-8 and order-16 WCT is better than the DCT and the phase-shift cosine transform (PSCT), which is an improved version of the DCT. A fast computational algorithm for the WCT is also derived, which, however, requires more computational efforts than the DCT
Keywords :
encoding; picture processing; transforms; DCT; Markov models; computational algorithm; digital image coding; discrete cosine transform; orthogonal transform; transform matrix; weighted cosine transform; Bit rate; Digital images; Discrete cosine transforms; Discrete transforms; Image coding; Solid modeling; Transform coding; Very large scale integration;
Conference_Titel :
Computer and Communication Systems, 1990. IEEE TENCON'90., 1990 IEEE Region 10 Conference on
Print_ISBN :
0-87942-556-3
DOI :
10.1109/TENCON.1990.152654
