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   Camera Calibration Data

This page contains links to some of the data described in:

Kobus Barnard, Lindsay Martin, Brian Funt, and Adam Coath,
A Data Set for Colour Research,
Color Research and Application, Volume 27, Number 3, pp. 147-151, 2002.

(This is the appropriate archival reference to this data).

Questions, comments, and problems with this data should be directed to Kobus Barnard.

 Description

This dataset consists of of 598 spectra and the corresponding RGBs for a Sony DXC-930 three chip CCD video camera. This camera was used to collect much of the data available from this web site, and thus further exploration of its calibration may be of interest to some.

Measurements consist of 23 patches (all but black) of the Macbeth colour chart under 26 different illuminants. Each spectrum consists of 101 measurements from 380 to 780 nm in 4nm increments. This is the output provided by our PhotoResearch PR-650 spectrometer.

The camera is a Sony DXC-930 three chip CCD camera used with gamma correction off, and the colour temparature set to 3200K (indoor illumination). This camera has a significant output with the lens cap on. This "black" output can be found in the camera black file below.

All RGB measurements are the spatial average of a 50 by 50 area in the center of the frame. Flare was reduced as best as possible. Further details of the experimental setup are provided in the paper.

IMPORTANT: Some of the RGBs have the value 255.0. These data values are likely clipped and should not be used. We include all data, since most (or all) RGB have at least one non clipped value. In other words, even if the red channel is clipped, the green or blue channel may contain useful information.

 Data

Illuminant Spectra: spectra.txt.gz (598 Spectra)
Each spectrum consists of 101 lines, 1 number per line.

RGB of White Reference: rgb.txt (598 RGB)
One R,G,B triplet per line.

Camera Black RGB camera_black.txt
A single R,G,B triplet.

This data was collected by Lindsay Martin under the guidance of Kobus Barnard in Brian Funt's Computational Colour Vision Laboratory.

 Publications That Use This Data


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