Device profiles for use in a digital image processing system
DC CAFCFirst Claim
1. A device profile for describing properties of a device in a digital image reproduction system to capture, transform or render an image, said device profile comprising:
- first data for describing a device dependent transformation of color information content of the image to a device independent color space; and
second data for describing a device dependent transformation of spatial information content of the image in said device independent color space.
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Abstract
Device profiles conventionally describe properties of a device or element within a digital image processing system that capture, transform or render color components of an image. An improved device profile includes both chromatic characteristic information and spatial characteristic information. The device profile is generated by use of both chromatic and spatial characteristic functions within a model based image processing system to predict both color and spatial characteristics of a processed image. The device profile generally includes: first data for describing a device dependent transformation of color information content of the image; and second data for describing a device dependent transformation of spatial information content of the image. In a special case, the device profile could contain only spatial characteristic information.
120 Citations
33 Claims
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1. A device profile for describing properties of a device in a digital image reproduction system to capture, transform or render an image, said device profile comprising:
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first data for describing a device dependent transformation of color information content of the image to a device independent color space; and second data for describing a device dependent transformation of spatial information content of the image in said device independent color space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of generating a device profile that describes properties of a device in a digital image reproduction system for capturing, transforming or rendering an image, said method comprising:
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generating first data for describing a device dependent transformation of color information content of the image to a device independent color space through use of measured chromatic stimuli and device response characteristic functions; generating second data for describing a device dependent transformation of spatial information content of the image in said device independent color space through use of spatial stimuli and device response characteristic functions; and combining said first and second data into the device profile. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A digital image processing system using a device profile for describing properties of a device in the system to capture, transform or render an image, said system comprising:
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means for utilizing first data of the device profile for describing a device dependent transformation of color information content of the image to a device independent color space through use of chromatic response characteristic functions; and means for utilizing second data of the device profile for describing a device dependent transformation of spatial information content of the image in said device independent color space through the use of spatial characteristic fimctions describing image spatial transform characteristics in said device independent color space. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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- 26. A device profile for describing properties of a device in a digital image reproduction system to capture, transform or render an image, said device profile comprising data for describing a device dependent transformation of spatial information content of the image to a device independent color space, wherein through use of spatial stimuli and device response for said device, said data is represented by spatial characteristic functions.
Specification