DocumentCode
1673656
Title
2D lossless discrete cosine transform
Author
Komatsu, Kunitoshi ; Sezaki, Kaoru
Author_Institution
Inst. of Ind. Sci., Univ. of Tokyo, Japan
Volume
3
fYear
2001
fDate
6/23/1905 12:00:00 AM
Firstpage
466
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;
fLanguage
English
Publisher
ieee
Conference_Titel
Image Processing, 2001. Proceedings. 2001 International Conference on
Conference_Location
Thessaloniki
Print_ISBN
0-7803-6725-1
Type
conf
DOI
10.1109/ICIP.2001.958152
Filename
958152
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