Industry Patents
Patent: 7529004
Color Matching in Lighting Reproduction Systems
(Click image for PDF of full patent)
| Patent Number: |
7529004 |
| Title: |
Color Matching in Lighting Reproduction Systems |
| Abstract: |
A lighting reproduction apparatus for illuminating a subject includes a
reproduction light optical source that generates reproduction light. The
optical source includes a plurality of light emitters, each characterized
by an individual color channel. There may be nine different color
channels. A driver drives the light emitter color channels with intensity
values at which a substantial spectral match is achieved between the
reproduction light and the desired illuminant, so that the subject
appears to be illuminated by the desired illuminant. These channel
intensity values may be determined by solving a minimization equation
that minimizes a sum of square residuals of the reproduction light
spectra to the desired illuminant spectra. The output reproduction light
may be metamerically, matched with the desired illuminant, with respect
to a particular camera's spectral response. One or more spectral
reflectances of the subject may be measured and incorporated into the
optimization process.
|
| Country of Issue: |
US |
| First Named Inventor: |
Debevec, Hawkins, Wenger |
| Assignee: |
University of Southern California |
| Continuation or Divisional of: |
|
| International Classification: |
H04N 1/46 |
| US Classification: |
358/509 |
| Issue Date: |
05-05-2009 |
| Filing Date: |
06-17-2004 |
| Application : |
10/869990 |
| Notes: |
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| Link to Patent at freepatentsonline.com: |
7529004 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7529004 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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