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

L. G C Hamey

doi:10.1109/DICTA.2005.75

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

L. G C Hamey^*

^*Corresponding author for this work

School of Computing

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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 language	English
Title of host publication	Digital Image Computing: Techniques and Applications (DICTA'05)
Editors	Brian C. Lovell, Anthony J. Maeder, Terry Caelli, Sebastien Ourselin
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	51-58
Number of pages	8
ISBN (Print)	0769524672, 9780769524672
DOIs	https://doi.org/10.1109/DICTA.2005.75
Publication status	Published - Dec 2005
Event	Digital Imaging Computing: Techniques and Applications, DICTA - 2005 - Cairns, Australia Duration: 6 Dec 2005 → 8 Dec 2005

Other

Other	Digital Imaging Computing: Techniques and Applications, DICTA - 2005
Country/Territory	Australia
City	Cairns
Period	6/12/05 → 8/12/05

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10.1109/DICTA.2005.75

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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). Article 1578107 Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/DICTA.2005.75

@inproceedings{3c1e8611fdf24b23911e96399d7a51f6,

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

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%.",

author = "Hamey, {L. G C}",

year = "2005",

month = dec,

doi = "10.1109/DICTA.2005.75",

language = "English",

isbn = "0769524672",

pages = "51--58",

editor = "Lovell, {Brian C.} and Maeder, {Anthony J.} and Terry Caelli and Sebastien Ourselin",

booktitle = "Digital Image Computing: Techniques and Applications (DICTA'05)",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

address = "United States",

note = "Digital Imaging Computing: Techniques and Applications, DICTA - 2005 ; Conference date: 06-12-2005 Through 08-12-2005",

}

Hamey, LGC 2005, Simultaneous estimation of camera response function, target reflectance and irradiance values. in BC Lovell, AJ Maeder, T Caelli & S Ourselin (eds), Digital Image Computing: Techniques and Applications (DICTA'05)., 1578107, Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 51-58, Digital Imaging Computing: Techniques and Applications, DICTA - 2005, Cairns, Queensland, Australia, 6/12/05. https://doi.org/10.1109/DICTA.2005.75

Simultaneous estimation of camera response function, target reflectance and irradiance values. / Hamey, L. G C.
Digital Image Computing: Techniques and Applications (DICTA'05). ed. / Brian C. Lovell; Anthony J. Maeder; Terry Caelli; Sebastien Ourselin. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2005. p. 51-58 1578107.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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N2 - 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%.

AB - 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%.

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BT - Digital Image Computing: Techniques and Applications (DICTA'05)

A2 - Lovell, Brian C.

A2 - Maeder, Anthony J.

A2 - Caelli, Terry

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PB - Institute of Electrical and Electronics Engineers (IEEE)

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T2 - Digital Imaging Computing: Techniques and Applications, DICTA - 2005

Y2 - 6 December 2005 through 8 December 2005

ER -

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

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