Image analysis – Image enhancement or restoration
Reexamination Certificate
2005-08-30
2005-08-30
Mehta, Bhavesh (Department: 2625)
Image analysis
Image enhancement or restoration
C382S260000, C382S274000, C382S275000, C382S284000, C358S003260, C358S003270
Reexamination Certificate
active
06937775
ABSTRACT:
A method of processing a digital image to improve contrast, the digital image being derived from an image captured by a recording medium having a nonlinear response to light, includes the steps of: applying a spatial filter to the digital image to produce a noise reduced digital image; subtracting the noise reduced digital image from the digital image to produce a difference digital image; applying a tone scale function to the noise reduced digital image to produce a tone scale adjusted digital image having the appearance of being derived from an image captured by a recording medium having a linear response; and combining the difference digital image with the tone scale adjusted digital image to produce a processed digital image, whereby the contrast of the digital image is improved without amplifying noise.
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Gallagher Andrew C.
Gindele Edward B.
Close Thomas H.
Eastman Kodak Company
Kassa Yosef
Mehta Bhavesh
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