Simultaneous estimation of camera response function, target reflectance and irradiance values

L. G C Hamey*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

1 Citation (Scopus)

Abstract

Video cameras may be used for radiometric measurement in machine vision applications including colour measurement and shape from shading. These techniques assume that the camera provides a linear measurement of light intensity. Even when the video gamma factor is disabled, video camera response is still often nonlinear and varies from one camera to another. We describe a method of measuring a camera's radiometric response function using unknown but stable reflectance targets and illumination. The technique does not require sophisticated equipment or precise measurement or control of physical properties. The technique simultaneously estimates the camera's radiometric response, the relative reflectance values of reflectance targets and the relative illumination levels of multiple light sources. The technique has been practically applied for colour measurement applications with an experimentally verified accuracy of 0.3%.

Original languageEnglish
Title of host publicationDigital Image Computing: Techniques and Applications (DICTA'05)
EditorsBrian C. Lovell, Anthony J. Maeder, Terry Caelli, Sebastien Ourselin
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages51-58
Number of pages8
ISBN (Print)0769524672, 9780769524672
DOIs
Publication statusPublished - Dec 2005
EventDigital Imaging Computing: Techniques and Applications, DICTA - 2005 - Cairns, Australia
Duration: 6 Dec 20058 Dec 2005

Other

OtherDigital Imaging Computing: Techniques and Applications, DICTA - 2005
CountryAustralia
CityCairns
Period6/12/058/12/05

    Fingerprint

Cite this

Hamey, L. G. C. (2005). Simultaneous estimation of camera response function, target reflectance and irradiance values. In B. C. Lovell, A. J. Maeder, T. Caelli, & S. Ourselin (Eds.), Digital Image Computing: Techniques and Applications (DICTA'05) (pp. 51-58). [1578107] Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/DICTA.2005.75