05046118 is referenced by 81 patents and cites 4 patents.

In any digital imaging system, the digital input signals must be converted to a visible image on some output material or medium. Because the range of this output medium is usually not the same as the input image range, care must be taken in converting the digital input signals into output signals. This conversion is done via the tone-scale transformation function. The type of tone-scale transformation function used largely determines the quality of the output image. A well designed tone-scale transformation function must ensure good contrast, no clipping and the display of the minimum and maximum densities that are present in the input. This invention deals with a reliable and robust technique of generating the tone-scale transformation function for digital projection X-ray input images. The method is based on the histogram entropy of the input image.

Title
Tone-scale generation method and apparatus for digital x-ray images
Application Number
7/475522
Publication Number
5046118
Application Date
February 6, 1990
Publication Date
September 3, 1991
Inventor
Ralph Schaetzing
Pittsford
NY, US
Isaac A Ajewole
Rochester
NY, US
Agent
William F Noval
Assignee
Eastman Kodak Company
NY, US
IPC
G06K 9/36
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