Camera calibration for color research

Jacobus J Barnard, Brian Funt

Research output: Chapter in Book/Report/Conference proceedingChapter

22 Citations (Scopus)

Abstract

In this paper we introduce a new method for determining the relationship between signal spectra and camera RGB which is required for many applications in color. We work with the standard camera model, which assumes that the response is linear. We also provide an example of how the fitting procedure can be augmented to include fitting for a previously estimated non-linearity. The basic idea of our method is to minimize squared error subject to linear constraints, which enforce positivity and range of the result. It is also possible to constrain the smoothness, but we have found that it is better to add a regularization expression to the objective function to promote smoothness. With this method, smoothness and error can be traded against each other without being restricted by arbitrary bounds. The method is easily implemented as it is an example of a quadratic programming problem, for which there are many software solutions available. In this paper we provide the results using this method and others to calibrate a Sony DXC-930 CCD color video camera. We find that the method gives low error, while delivering sensors which are smooth and physically realizable. Thus we find the method superior to methods which ignore any of these considerations.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages576-585
Number of pages10
Volume3644
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 Human Vision and Electronic Imaging IV - San Jose, CA, USA
Duration: Jan 25 1999Jan 28 1999

Other

OtherProceedings of the 1999 Human Vision and Electronic Imaging IV
CitySan Jose, CA, USA
Period1/25/991/28/99

Fingerprint

Cameras
cameras
Calibration
Color
color
quadratic programming
Quadratic programming
Video cameras
Charge coupled devices
charge coupled devices
nonlinearity
computer programs
sensors
Sensors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Barnard, J. J., & Funt, B. (1999). Camera calibration for color research. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3644, pp. 576-585). Society of Photo-Optical Instrumentation Engineers.

Camera calibration for color research. / Barnard, Jacobus J; Funt, Brian.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3644 Society of Photo-Optical Instrumentation Engineers, 1999. p. 576-585.

Research output: Chapter in Book/Report/Conference proceedingChapter

Barnard, JJ & Funt, B 1999, Camera calibration for color research. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3644, Society of Photo-Optical Instrumentation Engineers, pp. 576-585, Proceedings of the 1999 Human Vision and Electronic Imaging IV, San Jose, CA, USA, 1/25/99.
Barnard JJ, Funt B. Camera calibration for color research. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3644. Society of Photo-Optical Instrumentation Engineers. 1999. p. 576-585
Barnard, Jacobus J ; Funt, Brian. / Camera calibration for color research. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3644 Society of Photo-Optical Instrumentation Engineers, 1999. pp. 576-585
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