Eastman-kodak Company

George B Pawle

H Scott Gregory, Jr

Robert F Poe

Douglas G Walker

Anne C Rourke

Christopher M Heinz

Timothy K Rodgers

A system is disclosed that uses input and output color space identifiers and other information about the transforms to automatically determine a size and a class of identity function composite tabular function. The identity function is constructed. The identity function is composed with input and output composite tabular functions to form a net composite tabular function. The identity function is selected based on the characteristics of the input and output spaces, color space, and transform shape. The size of the identity function is determined by the maximum size of the color space functions and the interval spacing that needs to be maintained for the net function.

System for composing color transforms using class information

An interpolation system that breaks a color transform interpolation function into several suboperations or subfunctions. The subfunctions produce intermediate function results. The intermediate results are stored in a cache as the function is evaluated. Cache management operations locate and assign a cache cell to the intermediate results. In a subsequent evaluation that requires the same intermediate results, the intermediate results are obtained from the cache. The cache look-up rapidly provides the intermediate results which are then used to complete the function evaluation.

Method and apparatus for performing function evaluation using a cache

A system that combines a reference color image with a color move tracer image creating a combined image capable of being edited as desired by the operator and one which records the actual color edits made on the reference image. The tracer is a color grid that represents the domain of colors in a specified color space encoding. The grid is converted into a color edit transform table and the color edits within the color space on a higher resolution version of the reference image, or on other images, can be performed using a table look-up operation. The invention can also be used to capture effects transforms that modify the input/output and/or screen display of an image without necessarily modifying the original image.

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North Reading, MA, United States of America

George B Pawle