Color management with reference gamut
First Claim
1. Process for color management of image data which represent color values of an image to achieve an optimal change of the color values with respect to different and preselected color gamuts of an input device, and an output device, whereby an input color gamut includes all color values which can be captured by the input device and output as image data, and whereby an output color gamut includes all color values which can be processed by the output device upon input of image control data into the output device, the process comprising:
- a) receiving image data which represent first positions in a first color space and describe first color values, which are located within the input color gamut;
b) transforming the first positions by an input transformation into reference positions, whereby the transformation is designed such that the reference positions are located in a second color space and describe second color values, whereby a reference color gamut defines the color values reproducible by the reference positions;
c) transforming the reference positions by an output transformation into third positions, whereby the output transformation is designed such that the third positions are located in a third color space and describe third color values which are included by the output color gamut of the output device.
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Abstract
Process for the color management of image data which represent the color values of an image, in order to achieve an optimal change of the color values with respect to different and preselected color gamuts of an input device, especially a film scanner or digital camera and an output device, especially a photographic printer or a photolab, whereby an input color gamut includes all color values which can be captured by the input device and output as image data, and an output color gamut includes all color values which can be processed by the output device upon input of image control data into the output device. The process provides for receiving image data which represent first positions in a first color space and describe first color values, which are located within the input color gamut; transforming the first positions by an input transformation into reference positions, whereby the transformation is designed such that the reference positions are located in a second color space and describe second color values, whereby a reference color gamut defines the color values reproducible by the reference positions. The reference positions can be transformed by an output transformation into third positions, whereby the output transformation is designed such that the third positions are located in a third color space and describe third color values, whereby all color values come to be located in an output color gamut which includes the possible color control values of the output device.
50 Citations
13 Claims
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1. Process for color management of image data which represent color values of an image to achieve an optimal change of the color values with respect to different and preselected color gamuts of an input device, and an output device, whereby an input color gamut includes all color values which can be captured by the input device and output as image data, and whereby an output color gamut includes all color values which can be processed by the output device upon input of image control data into the output device, the process comprising:
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a) receiving image data which represent first positions in a first color space and describe first color values, which are located within the input color gamut;
b) transforming the first positions by an input transformation into reference positions, whereby the transformation is designed such that the reference positions are located in a second color space and describe second color values, whereby a reference color gamut defines the color values reproducible by the reference positions;
c) transforming the reference positions by an output transformation into third positions, whereby the output transformation is designed such that the third positions are located in a third color space and describe third color values which are included by the output color gamut of the output device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification