Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2007-05-22
2007-05-22
Grant, II, Jerome (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S518000
Reexamination Certificate
active
10104685
ABSTRACT:
If there is considerable difference in volume between the color gamut of one image processing device and the color gamut of the other image processing device, high-rate compression occurs and changes chroma to a great degree, resulting in color unbalancing. For example, if an image of the leaves of a plant including shadows is transferred from an image input device to an image output device and reproduced, the shadows discolor and look dark brown. According to the invention, the color gamut of the first image processing device is rotated by a predetermined hue angle and compressed to fall within the color gamut of the second image processing device and color values in the former gamut are mapped to those in the later gamut. By color transformation based on the thus defined mapping, color transformation is executed. Thereby, second color image data determined by rotating the hue angle of first color image data can be obtained. In circumstances where a plurality of color gamuts are available on an image processing device, mapping is defined adaptively for each gamut, thereby finer adjustment can be performed. Consequently, color gamut mapping of the first and second image processing devices in a device-independent color space, wherein there is great difference between their color gamut volumes, can be corrected so that color unbalancing can be prevented even for different forms of color gamut that is the target gamut of color output.
REFERENCES:
patent: 5953499 (1999-09-01), Narendranath et al.
patent: 6075614 (2000-06-01), Ohtsuka et al.
patent: 6081617 (2000-06-01), Bangham et al.
patent: 6297826 (2001-10-01), Semba et al.
patent: 6650772 (2003-11-01), Inoue et al.
patent: 11-31329 (1999-11-01), None
patent: 2001-043344 (2001-02-01), None
Fujino Makoto
Yamazaki Satoshi
Beyer & Weaver, LLP
Grant II Jerome
Seiko Epson Corporation
LandOfFree
Medium recording color transformation lookup table, printing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Medium recording color transformation lookup table, printing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medium recording color transformation lookup table, printing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3817647