The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 2013
Filed:
Aug. 13, 2007
Remco Theodorus Johannes Muijs, Eindhoven, NL;
Erno Hermanus Antonius Langendijk, Eindhoven, NL;
Remco Theodorus Johannes Muijs, Eindhoven, NL;
Erno Hermanus Antonius Langendijk, Eindhoven, NL;
TP Vision Holding B.V., Eindhoven, NL;
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 () into a transformed signal (RGBt) defined with respect to the reproduction RGB primaries (Ro, Go, Bo), whereby color information of the pixels (PPP) within the reproduction gamut (RG) is preserved. Scaling factors (SFi) indicating a distance between on the one hand pixels (PP, P) 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 (). The scaling factors (SFi) of pixels (PPP) of the transformed signal (RGBt) are spatial low-pass filtered () to obtain filtered factors (FFi) for these pixels (P, P, P). Component signal values of the transformed signal (RGBt) of the pixels (PPP) are corrected () 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).