NDLI: Rate Bounds on SSIM Index of Quantized Images

Content Provider	IEEE Xplore Digital Library
Author	Channappayya, S.S. Bovik, A.C. Heath, R.W.
Copyright Year	1992
Abstract	In this paper, we derive bounds on the structural similarity (SSIM) index as a function of quantization rate for fixed-rate uniform quantization of image discrete cosine transform (DCT) coefficients under the high-rate assumption. The space domain SSIM index is first expressed in terms of the DCT coefficients of the space domain vectors. The transform domain SSIM index is then used to derive bounds on the average SSIM index as a function of quantization rate for uniform, Gaussian, and Laplacian sources. As an illustrative example, uniform quantization of the DCT coefficients of natural images is considered. We show that the SSIM index between the reference and quantized images fall within the bounds for a large set of natural images. Further, we show using a simple example that the proposed bounds could be very useful for rate allocation problems in practical image and video coding applications.
Sponsorship	IEEE Signal Processing Society
Page Count	16
File Size	4613446
Starting Page	1624
Ending Page	1639
File Format	PDF
ISSN	10577149
Volume Number	17
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Distortion measurement Quantization Discrete cosine transforms Algorithm design and analysis Image coding Image quality Laplace equations Image processing Power system modeling Discrete transforms
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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