On Transparent Quality Image Coding Using Visual Models

V. Ramamoorthy; N. S. Jayant

doi:10.1117/12.952713

15 August 1989 On Transparent Quality Image Coding Using Visual Models

V. Ramamoorthy, N. S. Jayant

Proceedings Volume 1077, Human Vision, Visual Processing, and Digital Display; (1989) https://doi.org/10.1117/12.952713
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Since viewing conditions greatly affect the perception of an image, the coding algorithm must take into account the viewing conditions and the human visual perception mechanisms. If the coded image and the uncoded input image are indistinguishable in a casual viewing session lasting 20 seconds, then the coding algorithm is said to have attained Transparent quality. The smallest bit rate at which such transparent quality is achieved is called the perceptual entropy. Starting with a low bit rate vector quantizer which does not offer transparent quality encoding, we explore a technique with which perceptually relevant regions can be carefully encoded to achieve transparent and high quality reproductions. The bit rates associated with this technique are in the range of 1 to 3.5 bits/pixel and these can be regarded as an upper bound to the perceptual entropy.

Citation Download Citation

V. Ramamoorthy and N. S. Jayant "On Transparent Quality Image Coding Using Visual Models", Proc. SPIE 1077, Human Vision, Visual Processing, and Digital Display, (15 August 1989); https://doi.org/10.1117/12.952713

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available