Image analysis – Image enhancement or restoration – Intensity – brightness – contrast – or shading correction
Reexamination Certificate
2006-06-06
2006-06-06
Ahmed, Samir (Department: 2625)
Image analysis
Image enhancement or restoration
Intensity, brightness, contrast, or shading correction
C382S167000, C382S275000, C358S003270, C358S518000
Reexamination Certificate
active
07058234
ABSTRACT:
A method of enhancing the tonal and spatial characteristics of a digital image includes receiving a source digital image wherein the source digital image is in a luminance-chrominance representation having a luminance digital image channel and at least two chrominance digital image channels; generating a tone scale function that can be used to enhance the tonal characteristics of the source digital image; and classifying the tone scale function into one of two or more categories wherein the classification categories include expansive and compressive. The method further includes using the tone scale function, a spatial filter, and the luminance digital image channel to generate an enhanced luminance digital image channel when the tone scale function has been classified as compressive, and using the tone scale function and the luminance digital image channel to generate an enhanced luminance digital image channel when the tone scale function has been classified as expansive.
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Gallagher Andrew C.
Gindele Edward B.
Ahmed Samir
Kassa Yosef
Owens Raymond L.
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