Color balanced compression in dynamic range mismatched color systems

Patent metadata

Field	Value
Publication number	US-9014472-B2
Application number	US-201313837682-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 15, 2013
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

Methods, systems and processor-readable media for color balanced compression in dynamic range mistmatched color environments. An input L* can be compensated based on L* min in a destination space with respect to shadow colors while configuring a perceptual LUT during a profile phase. Input opponent color components a* and b* can be compressed based on how much L* is compensated to generate newly compressed L*a*b* values. The newly compressed L*a*b* values can be treated as an output L*a*b* to configure the perceptual LUT for color balanced compression thereof. Finally, an operation can be performed for recording in the output LUT, optimized CMYK values with respect to the output L*a*b* to configure the perceptual LUT in an ICC profile and result in the color balanced compression thereof.

First claim

The invention claimed is:

1. A method for color balanced compression in dynamic range mismatched color environments, said method comprising:
compensating input L* based on L* min in a destination space with respect to shadow colors of an image while configuring a perceptual LUT during a profile phase, wherein L* represents a luminance value and L* min represents a minimum luminance value in an L*a*b* color space;
compressing input opponent color components a* and b* based on h…

Assignees

• Xerox Corp

Inventors

• Lin Guo-Yau
• Sanchez James Michael

Classifications

• G06T11/10 Primary

  Physics · mapped topic

• G06T11/001 Primary

  Physics · mapped topic