[-] Show simple item record

dc.contributor.authorPark, Jae Byungeng
dc.contributor.authorDeSouza, Guilhermeeng
dc.date.issued2004-10eng
dc.description.abstractCamera 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.eng
dc.identifier.citationProceedings of the Third IEEE Conference on Sensors, pp. 24-27, Vienna, Austria, Oct. 2004.eng
dc.identifier.urihttp://hdl.handle.net/10355/9248eng
dc.publisherIEEEeng
dc.relation.ispartofElectrical and Computer Engineering publications (MU)eng
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. College of Engineering. Department of Electrical and Computer Engineeringeng
dc.subject.lcshCCD cameraseng
dc.subject.lcshColor photographyeng
dc.subject.lcshReflection (Optics)eng
dc.titleAnalysis of Clipping Effect in Color Images Captured by CCD Cameraseng
dc.typeArticleeng


Files in this item

[PDF]

This item appears in the following Collection(s)

[-] Show simple item record