Patent ID: 8340462

Claim:
A machine-implemented method, comprising: determining a particular parameter value corresponding to a first pixel in a first version of an image, wherein the particular parameter value is greater than a first parameter value but less than a second parameter value which is a fixed increment greater than the first parameter value; accessing an entry in a look up table (LUT) corresponding to the first parameter value; obtaining from the entry of the LUT at least: (a) the first parameter value; (b) a first adjustment factor corresponding to the first parameter value; and (c) an adjustment differential which represents the difference between a second adjustment factor corresponding to the second parameter value and the first adjustment factor; based at least partially upon the first adjustment factor and the adjustment differential, deriving a particular adjustment factor for the first pixel; and using the particular adjustment factor to map the first pixel in the first version of the image to a second pixel in a second version of the image.