Invention Grant
US07652808B2 Spatially varying luminance compression gamut mapping system and method
有权
空间变化的亮度压缩色域映射系统和方法
- Patent Title: Spatially varying luminance compression gamut mapping system and method
- Patent Title (中): 空间变化的亮度压缩色域映射系统和方法
-
Application No.: US10733608Application Date: 2003-12-11
-
Publication No.: US07652808B2Publication Date: 2010-01-26
- Inventor: Raja Bala
- Applicant: Raja Bala
- Applicant Address: US CT Norwalk
- Assignee: Xerox Corporation
- Current Assignee: Xerox Corporation
- Current Assignee Address: US CT Norwalk
- Agency: Oliff & Berridge, PLC
- Main IPC: G03F3/00
- IPC: G03F3/00 ; G06K1/00 ; G06K9/00 ; G06K9/36

Abstract:
A system and method for gamut mapping includes a luminance compression algorithm for gamut mapping that varies across different parts of the image. In shadow regions, a soft compression function is applied to bring out the detail. In other regions, including areas with high local contrast, a hard clipping function is applied to preserve local contrast. The algorithm adaptively blends between these two functions to ensure that the overall compression function is spatially smooth. The system and method may also use chrominance information to compute “perceived lightness”, to be used as input to the low-pass filter. Also, the blending function α( ) could be a function of chrominance as well as luminance.
Public/Granted literature
- US20050128496A1 Spatially varying luminance compression gamut mapping system and method Public/Granted day:2005-06-16
Information query