Patent ID: 6278800
Filing Date: 2001-08-21
Classification: H04N

Abstract:
A method for transforming color-image signals corresponding to a first set of color primaries to color-image signals corresponding to a second set of color primaries, comprising the steps of:a. inputting a color image represented by color-image signals, using an input device, the color-image signals having first colorimetric properties including a chromaticity gamut;b. transforming all the color-image signals corresponding to the first set of color primaries to form intermediary color-image signals corresponding to a third set of color primaries and having second colorimetric properties different from said first colorimetric properties;c. applying a transform to each of said intermediary color-image signals to form modified intermediary color-image signals having consistent shadow-to-highlight characteristics for colored objects within, coincident with and outside the chromatically gamut; andd. transforming all said modified intermediary color-image signals to form color-image signals corresponding to said second set of color primaries.