05224177 is referenced by 47 patents and cites 9 patents.

A method and system for correcting a non-linear characteristic of an image, wherein an input image is digitized to produce digital image data representative of the image and a histogram of the digital image data is produced. At least a first pixel value characteristic of a variable under which the image was derived is extracted from the histogram. A plurality of non-linear correction curves relating original pixel values to corrected pixel values for different degrees of the variable are stored in a memory, and a particular one of the correction curves is selected based at least in part on the first extracted pixel value and a predetermined corrected pixel value. Corrected image data are then formed utilizing the selected correction curve by correcting each original pixel value of the image to a respective corrected pixel value based on the relationship therebetween defined by the selected correction curve, and a non-linearity corrected image is produced based on the corrected image data.

Title
High quality film image correction and duplication method and system
Application Number
7/786008
Publication Number
5224177
Application Date
October 31, 1991
Publication Date
June 29, 1993
Inventor
Hitoshi Yoshimura
Kanagawa
JP
Kunio Doi
Hinsdale
IL, US
Agent
Oblon Spivak McClelland Maier & Neustadt
Assignee
The University of Chicago
IL, US
IPC
G06K 9/40
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