Title:
入力色域よりも狭い再生色域への色域マッピングのための方法、装置、及び、プログラム
Document Type and Number:
Japanese Patent JP5107355
Kind Code:
B2
Abstract:
A method of gamut mapping maps an input image composed of pixels and having an input gamut (IG) defined by input RGB primaries (Ri, Gi, Bi) to a reproduction gamut (RG) defined by reproduction RGB primaries (Ro, Go, Bo). The reproduction gamut (RG) is narrower than the input gamut (IG). An input signal (RGBin) defined with respect to the input RGB primaries (Ri, Gi, Bi) is color transformed (1) into a transformed signal (RGBt) defined with respect to the reproduction RGB primaries (Ro, Go, Bo), whereby color information of the pixels (P1, P2, P3) within the reproduction gamut (RG) is preserved. Scaling factors (SFi) indicating a distance between on the one hand pixels (P1, P2, P3) of the transformed signal (RGBt) which are outside the reproduction gamut (RG), and on the other hand an edge of the reproduction gamut (RG) are determined (2). The scaling factors (SFi) of pixels (P1, P2, P3) of the transformed signal (RGBt) are spatial low-pass filtered (3) to obtain filtered factors (FFi) for these pixels (P1, P2, P3). Component signal values of the transformed signal (RGBt) of the pixels (P1, P2, P3) are corrected (4) in response to the filtered factors (FFi) to obtain reproduction signal values (RGBo) which are input values (RGBi) moved towards inside the reproduction gamut (RG).
Inventors:
Mueis Remco Jay
Rankendijk Erno H
Rankendijk Erno H
Application Number:
JP2009524290A
Publication Date:
December 26, 2012
Filing Date:
August 13, 2007
Export Citation:
Assignee:
TP Vision Holding BV
International Classes:
H04N1/46; G06T1/00; G06T5/20; H04N1/60
Domestic Patent References:
| JP8079545A |
Foreign References:
| WO2005109854A1 |
Attorney, Agent or Firm:
Longhua International Patent Service Corporation