Invention Grant
- Patent Title: Color navigation system
- Patent Title (中): 彩色导航系统
-
Application No.: US12306331Application Date: 2007-06-22
-
Publication No.: US08111004B2Publication Date: 2012-02-07
- Inventor: Johannes Petrus Wilhelmus Baaijens
- Applicant: Johannes Petrus Wilhelmus Baaijens
- Applicant Address: NL Eindhoven
- Assignee: Koninklijke Philips Electronics N.V.
- Current Assignee: Koninklijke Philips Electronics N.V.
- Current Assignee Address: NL Eindhoven
- Agent Mark L Beloborodov
- Priority: EP06116110 20060627
- International Application: PCT/IB2007/052430 WO 20070622
- International Announcement: WO2008/001290 WO 20080103
- Main IPC: H05B37/02
- IPC: H05B37/02

Abstract:
A system and method for color navigation through a CIELAB color space with coordinates hue (H), lightness (L), chroma (C), with intervals ΔH, ΔL, ΔC such that the perceptual color difference AE1Nv, defined according to the formula: AZW =^{AL)2+{fc(H)−ACf+[AH)2, is constant for steps in direction C and L and for steps in direction H along boundary of color space. fc(H) is a proportionality factor between 0 and 1 depending on hue. For hue values between red (H1) and green (H2), fc(H) =1. For hue values between green (H2) and blue (H3), the proportionality factor fc(H) is set to a constant value foB such that Nκ,GB(fGB) differs less than 50% from NH,RG—For hue values between blue (H3) and red (H1), the proportionality factor fc(H) is set to a constant value fβR such that N^BR^BR) differs less than 50% from NH,RG—.
Public/Granted literature
- US20090278470A1 COLOR NAVIGATION SYSTEM Public/Granted day:2009-11-12
Information query