Facsimile and static presentation processing – Facsimile – Auxiliary signal
Patent
1992-10-22
1994-07-12
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Auxiliary signal
358458, 395132, H04N 146
Patent
active
053293797
ABSTRACT:
A method of quantitatively measuring fidelity of a reproduced image reconstructed from a compressed data representation of an original image is disclosed. The method comprises, responsive to user selection, for establishing a global assessment mode or a local assessment mode. In the global assessment mode changes in luminance of the reproduced image from the original image and changes in color in first and second color difference values of the reproduced image from the original image are used score fidelity. Changes in luminance are measured using a dynamic range, nonlinear transform equation. In the local assessment mode, and responsive to user selection, the reproduced image and the original image are segmented and corresponding pairs of segments from the reproduced image and the original image are identified. Scoring of fidelity of the reproduced image to the original image is done by comparing corresponding pairs of segments in color, luminance, shape, displacement and texture.
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Pietras Mark A.
Rodriguez Arturo A.
Saenz Andres J.
Bogdon Bernard D.
Coles Sr. Edward L.
Dillon Andrew J.
International Business Machines - Corporation
O'Malley Paul W.
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