Invention Grant
US09467598B2 Method, apparatus and computer program for adaptive black point compensation
有权
自适应黑点补偿的方法,装置和计算机程序
- Patent Title: Method, apparatus and computer program for adaptive black point compensation
- Patent Title (中): 自适应黑点补偿的方法,装置和计算机程序
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Application No.: US12732949Application Date: 2010-03-26
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Publication No.: US09467598B2Publication Date: 2016-10-11
- Inventor: Nicolas P. M. F. Bonnier , Jérôme O. R. Guermont , Francis J. M. Schmitt
- Applicant: Nicolas P. M. F. Bonnier , Jérôme O. R. Guermont , Francis J. M. Schmitt , Pamela Jeanette Schmitt
- Applicant Address: NL Venlo
- Assignee: OCE-TECHNOLOGIES B.V.
- Current Assignee: OCE-TECHNOLOGIES B.V.
- Current Assignee Address: NL Venlo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: EP07117464 20070928; EP08305538 20080909
- Main IPC: H04N1/60
- IPC: H04N1/60

Abstract:
A system and method for carrying out improved spatial and color adaptive gamut mapping algorithms, based on image decomposition in two bands Ihigh and Ilow using 5D bilateral filtering. A function g( ) applied to the low-pass band Ilow carries out black point compensation followed by a gamut clipping algorithm. Function k( ) applied to Ihigh is a locally adaptive function. The merging and adaptive mapping of IhighM and IlowM by function f( ) using local adaptive implementations of the two families of pointwise GMAs: compression and clipping is carried out. Two functions f( ) are proposed, they take into account the color properties of the neighborhood of each pixel. Black point compensation is adaptive by, in dependence of a histogram of the image, carrying out black point compensation if the number of pixels below the black point of the output device is more than a first threshold; carrying out partial black point compensation if the number of pixels below the black point of the output device is between the first and a second threshold and carrying out no black point compensation if the number of pixels below the black point is less than the second threshold.
Public/Granted literature
- US20100272353A1 METHOD, APPARATUS AND COMPUTER PROGRAM FOR ADAPTIVE BLACK POINT COMPENSATION Public/Granted day:2010-10-28
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