Adaptive DCT coding using the new universal image quality index

Aldo Morales; Sedig Agili; Lakshmi P. Baskaran

doi:10.1117/12.617930

16 September 2005 Adaptive DCT coding using the new universal image quality index

Aldo Morales, Sedig Agili, Lakshmi P. Baskaran

Proceedings Volume 5915, Mathematics of Data/Image Coding, Compression, and Encryption VIII, with Applications; 59150H (2005) https://doi.org/10.1117/12.617930
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

Aldo Morales, Sedig Agili, and Lakshmi P. Baskaran "Adaptive DCT coding using the new universal image quality index", Proc. SPIE 5915, Mathematics of Data/Image Coding, Compression, and Encryption VIII, with Applications, 59150H (16 September 2005); https://doi.org/10.1117/12.617930

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