Adaptive DCT coding using the new universal image quality index

Aldo Morales, Sedig Agili, Lakshmi P. Baskaran

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


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.

Original languageEnglish (US)
Article number59150H
Pages (from-to)1-8
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2005
EventMathematics of Data/Image Coding, Compression, and Encryption VIII, with Applications - San Diego, CA, United States
Duration: Aug 1 2005Aug 3 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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