Color calibration device and method

Details Color calibration device and method Color calibration device and method

1998-12-09

2001-10-09

Lee, John R. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C356S236000

Reexamination Certificate

active

06300621

ABSTRACT:

FIELD
Embodiments of the present invention relate to imaging, and more particularly, to a method and apparatus for color calibration of a color camera.
BACKGROUND
A colorimetric photon source is useful in calibrating the colorimetric response of a color imaging device. In addition to calibration, the response of the imaging device to a photon source of known wavelength may be measured for purposes of characterization and quality control.
It is known that reflective imaging targets may be provided for color calibration. Reflective targets for calibration generally use a reflective colorimetric substance such as paint and are illuminated with broadband (white) light sources. However, reflective targets generally have broadband reflectance, which complicates color camera calibration. Reflective targets are difficult to illuminate uniformly, as well; making the calibration more complicated. Furthermore, many pigmented paints age and consequently change their color over their lifetime, requiring frequent re-calibration of test targets.
Consequently, it is useful in the art of color imaging calibration to provide a cost effective, stable source of photons having narrow spectral power and having a uniform illumination pattern within the field of view of the imaging device to be calibrated.


REFERENCES:
patent: 4232971 (1980-11-01), Suga
patent: 5268749 (1993-12-01), Weber et al.
patent: 5828449 (1998-10-01), King et al.
patent: 5914245 (1999-06-01), Bylina et al.
patent: 59-60229 (1984-04-01), None

Affiliated with

Also associated with

Rating

Color calibration device and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Color calibration device and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color calibration device and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2587302