Title :
2D lossless discrete cosine transform
Author :
Komatsu, Kunitoshi ; Sezaki, Kaoru
Author_Institution :
Inst. of Ind. Sci., Univ. of Tokyo, Japan
fDate :
6/23/1905 12:00:00 AM
Abstract :
Since the lossless DCT is compatible with JPEG or MPEG, it is expected to play an important role in unified lossless/lossy image coding. However, there is a problem that the difference between the transform coefficients of the lossless DCT and those of the (lossy) DCT is not very small. We present the design of a two dimensional lossless DCT based on a 4-point two dimensional lossless WHT and indicate that its number of rounding off becomes smaller than that of the one dimensional lossless DCT and, as a result, the difference between its transform coefficients and those of the DCT becomes small
Keywords :
Hadamard transforms; Walsh functions; discrete cosine transforms; image coding; transform coding; 2D lossless discrete cosine transform; JPEG; MPEG; Walsh-Hadamard transforms; lossless DCT; lossless WHT; lossy DCT; transform coefficients; unified lossless/lossy image coding; Art; Biomedical imaging; Discrete cosine transforms; Discrete wavelet transforms; Entropy; Image coding; Image reconstruction; PSNR; Satellites;
Conference_Titel :
Image Processing, 2001. Proceedings. 2001 International Conference on
Conference_Location :
Thessaloniki
Print_ISBN :
0-7803-6725-1
DOI :
10.1109/ICIP.2001.958152
