05991456 is referenced by 250 patents and cites 5 patents.

A method of improving a digital image is provided. The image is initially represented by digital data indexed to represent positions on a display. The digital data is indicative of an intensity value I.sub.i (x,y) for each position (x,y) in each i-th spectral band. The intensity value for each position in each i-th spectral band is adjusted to generate an adjusted intensity value for each position in each i-th spectral band in accordance with ##EQU1## where S is the number of unique spectral bands included in said digital data, W.sub.n is a weighting factor and "*" denotes the convolution operator. Each surround function F.sub.n (x,y) is uniquely scaled to improve an aspect of the digital image, e.g., dynamic range compression, color constancy, and lightness rendition. The adjusted intensity value for each position in each i-th spectral band is filtered with a common function and then presented to a display device. For color images, a novel color restoration step is added to give the image true-to-life color that closely matches human observation.

Title
Method of improving a digital image
Application Number
8/654840
Publication Number
5991456
Application Date
May 29, 1996
Publication Date
November 23, 1999
Inventor
Glenn A Woodell
Newport News
VA, US
Daniel J Jobson
Newport News
VA, US
Zia ur Rahman
Newport News
VA, US
Agent
Peter J Van Bergen
Assignee
The United States of America represented by the Administrator of the National Aeronautics and Space Administration
DC, US
Science and Technology Corporation
VA, US
IPC
G06K 9/40
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