Patent ID: 6937758

Claim:
A method for producing a reproduction of a sepia-tone image, the sepia-tone image having original sepia-tones which have degraded due to aging, the method comprising: scanning said sepia-tone image with visible light and infrared light; using data associated with visible light reflected from the image and data associated with infrared light reflected from the image, creating adjusted data by: transforming the data associated with visible light reflected from the image to a L*a*b* color coordinate system, where ‘L’=luminance value, ‘a’=red-yellow value, and ‘b’=green-blue value; calculating a benchmark ‘a’ value and a benchmark ‘b’ value for the image from the transformed data associated with visible light reflected from the image, while excluding from the calculation data having either: an ‘L’ value less than a benchmark ‘L’ value, or a negative ‘b’ value; replacing ‘a’ values in the transformed data with said benchmark ‘a’ value; replacing ‘b’ values in the transformed data with said benchmark ‘b’ value; replacing the ‘L’ values of the data with data associated with infrared light reflected from the image; converting the adjusted date to a color coordinate system of an output device; and outputting the converted data to the output device.