Retinex Image Processing--Publications--NASA CR 198194 Conference

PROPERTIES OF A CENTER/SURROUND RETINEX   PART ONE: SIGNAL PROCESSING DESIGN

Zia-ur Rahman


Abstract

The last version of Edwin Land's retinex model for human vision's lightness and color constancy has been implemented. Previous research has established the mathematical foundations of Land's retinex but has not examined specific design issues and their effects on the properties of the retinex operation. Here we describe the signal processing design of the retinex. We find that the placement of the logarithmic function is important and produces best results when placed after the surround formation. We also find that best rendition is obtained for a ``canonical'' gain-offset applied after the retinex operation.
Download

Retinex Publications Page
Retinex Home Page