DocumentCode
3508385
Title
Restoration of low frequency coefficients
Author
Cham, W.K. ; Tse, F.-W.
Author_Institution
Chinese Univ. of Hong Kong, Shatin, Hong Kong
Volume
2
fYear
1996
fDate
14-18 Oct 1996
Firstpage
1082
Abstract
The DC coefficient restoration scheme is a technique which can be used to increase the compression ability of transform image coding by not transmitting the DC coefficients but instead estimating them from the transmitted AC component. Tse and Cham (see Fifth International Conference on Image Processing and Its Application, p.569-73, 1995) proposed an improved version of the technique which allows an image to be restored with no or small visual degradation by transmitting a small portion of the DC coefficients. We show that the same technique can be used to restore not only the DC coefficients but also a portion of AC coefficients. As a result, a higher compression ratio can be obtained
Keywords
image coding; image restoration; transform coding; DC coefficient restoration; high compression ratio; image compression; image restoration; low frequency coefficients; transform image coding; transmitted AC component; Degradation; Discrete cosine transforms; Discrete transforms; Frequency; Image coding; Image restoration; Pixel; Radio access networks; Transform coding;
fLanguage
English
Publisher
ieee
Conference_Titel
Signal Processing, 1996., 3rd International Conference on
Conference_Location
Beijing
Print_ISBN
0-7803-2912-0
Type
conf
DOI
10.1109/ICSIGP.1996.566281
Filename
566281
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