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Proceedings Paper

Adaptive DCT coding using the new universal image quality index
Author(s): Aldo Morales; Sedig Agili; Lakshmi P. Baskaran
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Paper Abstract

An adaptive discrete cosine transform (DCT) algorithm was presented by Hontsch et. al. under the perceptual metric which provided good bit rate. However, this method requires carefully calibrated viewing conditions. In this paper, we present a new adaptive discrete cosine transform where the quantization steps are adapted for each DCT coefficient using the new universal quality index. This new quality index does not require carefully calibrated viewing conditions and it is based on a combination of luminance and contrast distortions, and loss of correlation. Results obtained show that the procedure converges and provides a good bit rate.

Paper Details

Date Published: 17 September 2005
PDF: 8 pages
Proc. SPIE 5915, Mathematics of Data/Image Coding, Compression, and Encryption VIII, with Applications, 59150H (17 September 2005); doi: 10.1117/12.617930
Show Author Affiliations
Aldo Morales, The Pennsylvania State Univ. (United States)
Sedig Agili, The Pennsylvania State Univ. (United States)
Lakshmi P. Baskaran, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 5915:
Mathematics of Data/Image Coding, Compression, and Encryption VIII, with Applications
Mark S. Schmalz, Editor(s)

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