Analysis of Clipping Effect in Color Images Captured by CCD Cameras

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Analysis of Clipping Effect in Color Images Captured by CCD Cameras

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[-] show simple item record Park, Jae Byung DeSouza, Guilherme 2010-12-07T20:45:00Z 2010-12-07T20:45:00Z 2004-10
dc.identifier.citation Proceedings of the Third IEEE Conference on Sensors, pp. 24-27, Vienna, Austria, Oct. 2004. en_US
dc.description.abstract Camera sensors (CCD) have a limited dynamic range that constrains the brightness of the incident light that can be quantified. In other words, if the ray of incident light is too intense, the sensor saturates and the value quantified is inadequately represented. This color clipping effect is a common problem in computer vision and it can become specially difficult when dealing with specular objects against a low-intensity background. In this paper, we present a method for analyzing such clipping effects of CCD cameras appearing in color images. Using an averaging technique to estimate the color of the illuminant, we define two types of axes in the RGB color cube: the Illumination Axis and the Clipping Axis. Our study concludes the followings: 1) the clipped pixels from a dielectric object form one or two lines, depending on the number of color channels on which the clipping effect takes place; and 2) these lines are parallel to the Clipping Axes. These two properties allow for a framework for a color-based segmentation that works even in the presence of saturated (specular) regions in the image. Moreover, the captured images can now be obtained under a wider variation of illumination conditions. en_US
dc.language.iso en_US en_US
dc.publisher IEEE en_US
dc.relation.ispartof Electrical and Computer Engineering publications (MU) en_US
dc.subject.lcsh CCD cameras en_US
dc.subject.lcsh Color photography en_US
dc.subject.lcsh Reflection (Optics) en_US
dc.title Analysis of Clipping Effect in Color Images Captured by CCD Cameras en_US
dc.type Article en_US
dc.relation.ispartofcommunity University of Missouri-Columbia. College of Engineering. Department of Electrical and Computer Engineering

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