System for accurately and precisely representing image color information
First Claim
1. A method for accurate and precise representation of color for a series of master images, each master image being representable by pixel values representing a plurality of color primaries, including the steps of:
- (a) displaying each master image on a source display in a source environment;
(b) measuring, or determining from previous measurements, spectral characteristics corresponding to at least one portion of at least one master image as such master image is displayed on the source display in the source environment;
(c) conveying, directly or after intermediate storage, to a presentation environment the color pixel values representing each such master image plus the spectral characteristics corresponding to each such master image; and
(d) transforming the color pixel values of each such master image to generate a corresponding presentation image for display in the presentation environment on a presentation display distinct from the source display by applying the spectral characteristics corresponding to such master image to the color pixel values of such master image such that the resulting corresponding presentation image approximates the color of such master image when displayed on the source display in the source environment.
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Abstract
A method and system for accurate and precise representation of color for still and moving images, particularly sequences of digitized color images. Spectral and/or extended dynamic range information is retained as images are captured, processed, and presented during color adjustment. Using this extra spectral information, various methodologies for further presenting or processing the color within these images can be optimized. Presentation-device independence is achieved not by attempting to discover a device-independent intermediate representation, but rather by deferring the binding and mapping of color representation onto a presentation device until its actual use.
17 Citations
20 Claims
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1. A method for accurate and precise representation of color for a series of master images, each master image being representable by pixel values representing a plurality of color primaries, including the steps of:
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(a) displaying each master image on a source display in a source environment; (b) measuring, or determining from previous measurements, spectral characteristics corresponding to at least one portion of at least one master image as such master image is displayed on the source display in the source environment; (c) conveying, directly or after intermediate storage, to a presentation environment the color pixel values representing each such master image plus the spectral characteristics corresponding to each such master image; and (d) transforming the color pixel values of each such master image to generate a corresponding presentation image for display in the presentation environment on a presentation display distinct from the source display by applying the spectral characteristics corresponding to such master image to the color pixel values of such master image such that the resulting corresponding presentation image approximates the color of such master image when displayed on the source display in the source environment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 19)
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14. A method for adjusting the representation of color for a series of master images, each master image being representable by pixel values representing a plurality of color primaries, including the steps of:
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(a) displaying each master image on a source display in a source environment; (b) measuring, or determining from previous measurements, source presentation environment information comprising at least one of (1) spectral characteristics corresponding to at least one master image displayed on the source display, and (2) at least one of spectral or contrast confounds in the source environment that affect displayed master images; (c) conveying, directly or after intermediate storage, to a presentation environment the color pixel values representing each such master image plus the corresponding spectral characteristics of each such master image; and (d) transforming the color pixel values of each such master image to generate a corresponding presentation image by applying the source presentation environment information to the color pixel values such that the resulting corresponding presentation image approximates the color of such master image when displayed on the source display in the source environment; and (e) displaying the transformed color pixel values on a presentation display in the presentation environment, wherein the presentation display is not the source display. - View Dependent Claims (15, 16, 17, 18, 20)
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Specification