Color image processing apparatus which uses private tags to alte

Details Color image processing apparatus which uses private tags to alte Color image processing apparatus which uses private tags to alte

1995-09-15

1997-07-08

Brinich, Stephen

Facsimile and static presentation processing

Natural color facsimile

Color correction

358527, H04N 140

Patent

active

056467524

ABSTRACT:
An apparatus for converting input color image data between a device-dependent color space and a device-independent color space uses a device profile having public tags through which an unalterable series of color transformation operations can be accessed, and private tags through which an alternative series of color transformation operations can be accessed. The apparatus inputs the image data and stores a first private tag and a second private tag. The first private tag stores override information for overriding the unalterable series of color transformation operations, and the second private tag stores, in a hierarchical storage structure, tag element data and references to public tags and other private tags in the device profile. The apparatus determines, based on the override information in the first private tag, whether to access the second private tag, and reads data from the second private tag in a case that it is determined to access the second private tag. The apparatus includes pointers within the hierarchical storage structure to access the tag element data and the references to public tags and other private tags in the second tag. The apparatus performs color transformation operations on the color image data using the data read from the second tag.

REFERENCES:
patent: 4941039 (1990-07-01), E'Errico

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