NDLI: A novel approach to color image compression using 3-d Discrete Cosine Transform (DCT)

Content Provider	IEEE Xplore Digital Library
Author	Nath, V.K. Hazarika, D. Mahanta, A.
Copyright Year	2008
Description	Author affiliation: Deptt. Of Electron.&Commun. Eng.., Tezpur Univ., Tezpur (Nath, V.K.; Hazarika, D.; Mahanta, A.)
Abstract	Most of the color image compression schemes transforms the highly correlated RGB color space into a decorrelated color space like YUV, YCrCb etc. in order to reduce the redundancies between the color components, then the decorrelated color components are coded individually by monochrome image compression schemes. In this paper, we present a novel approach to color image compression scheme using 3-Dimensional Discrete Cosine Transform (3-D DCT). We use 3-D DCT to reduce the intercolor redundancy. In the proposed scheme the 3-D block DCT is directly applied on the highly correlated RGB color components and the coefficients are quantized and entropy coded. We also propose a wavelet structure for 3-D block DCT coefficients. We use Lagrange multiplier method for optimal bit allocation between the different slices of 3-D DCT coefficients. Our proposed coder gains competitive results comparing to the performance of JPEG baseline and JPEG2000 standard. Experimental results shows that the proposed coder performs close to the JPEG2000 standard in terms of R-D performance and outperforms the JPEG baseline standard by a large margin.
Starting Page	205
Ending Page	210
File Size	12466226
Page Count	6
File Format	PDF
ISBN	9781424423750
ISSN	15512541
DOI	10.1109/MLSP.2008.4685480
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-16
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Discrete cosine transforms Color Image coding Code standards Decorrelation Discrete transforms Entropy Lagrangian functions Bit rate Performance gain
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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