7 September 1998 Analysis of the compensating mechanism of a color CCD camera for changes of light
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Proceedings Volume 3409, Electronic Imaging: Processing, Printing, and Publishing in Color; (1998) https://doi.org/10.1117/12.324137
Event: SYBEN-Broadband European Networks and Electronic Image Capture and Publishing, 1998, Zurich, Switzerland
Abstract
Color cameras usually contain a device called white balance that allows one to capture a white reference without predominant colors. This adjustment works when the light source changes, in order to compensate for possible variations of the spectral radiant power distribution of the source. If the compensation is not totally correct, then variations in the RGB values of a color image are usually registered. We have analyzed the compensating mechanism of white balance in a color CCD camera. Changes between common lights -- fluorescent, incandescent and daylight -- have been considered. We have carried out two experiments. In the first one, we have adjusted the white balance for a given lighting and it has not been readjusted even though the light source changed. In the second one, we have adjusted the white balance for each change of light source. The discussion of the results is based on the registered variations obtained in both experiments after sequentially capturing one hundred color sheets covering the visible spectrum under separate illumination.
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Montserrat Corbalan-Fuertes, Montserrat Corbalan-Fuertes, Maria Sagrario Millan Garcia-Verela, Maria Sagrario Millan Garcia-Verela, Maria Josefa Yzuel, Maria Josefa Yzuel, } "Analysis of the compensating mechanism of a color CCD camera for changes of light", Proc. SPIE 3409, Electronic Imaging: Processing, Printing, and Publishing in Color, (7 September 1998); doi: 10.1117/12.324137; https://doi.org/10.1117/12.324137
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