Title :
Coefficient grouping method for shape-adaptive DCT
Author :
Bi, M. ; Ong, S.H. ; Ang, Y.H.
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
fDate :
2/1/1996 12:00:00 AM
Abstract :
A generalised transform scheme for arbitrarily shaped image segments for the purpose of image compression is presented. The main feature of the scheme is an adaptive coefficient grouping method used in the second stage of the DCT. Experimental results show that this transform scheme performs better in terms of transform efficiency and maximum reducible bits than previously proposed methods for all the image models used
Keywords :
adaptive codes; data compression; discrete cosine transforms; image coding; image segmentation; transform coding; coefficient grouping; image compression; image model; image segments; maximum reducible bits; shape-adaptive DCT; transform efficiency;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960145
