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Calibration of color cameras requires that a calibration pattern is recorded and color responsivity curves are estimated from the recorded data. Very often, these curves are sampled at discrete wavelength , so that the calibration problem can be written as a system of linear equations. The solution of the – usually overdetermined – problem is subject to a(More)
In this contribution we present experiments on color image enhancement for several different non-linear filters which originally were defined for gray-level images. We disturb sample images by different types of noise and measure performance of the filters. We provide signal-to-noise measurements as well as perceived color difference in ∆E as defined by the(More)
Typical computer vision systems usually include a set of components such as a preprocessor, a feature extractor, and a classifier that together represent an image processing pipeline. For each component there are different operators available. Each operator has a different number of parameters with individual parameter domains. The challenge in developing a(More)
The vector median filter(VMF) is a useful and common tool for noise removal in color image processing[HPP04,PV00,AHN90]. The drawback of the approach in its general form is the high computational cost. Indeed it takes O(n × m × ms 4) distance evaluations for computing the filter response, where ms ist the mask size and n × m the dimension of the image. In(More)
Zusammenfassung In diesem Beitrag wird der Einfluß der Farbnor-mierung und der Farbkalibrierung auf die Performanz der farbbasierten Objekterkennung am Beispiel eines Roboters mit einem omnidirektiona-len Kamerasystem untersucht. Der Roboter soll ein Objekt, in diesem Fall einen roten Ball, in einem langen Flur mit stark variierender Be-leuchtung finden.(More)
Zusammenfassung. In diesem Paper wird ein zweistufiges Verfahren zur Farb-kalibrierung vorgestellt, welches auf [2, 6, 5] basiert. Unter Farbkalibrierung ist in diesem Kontext die farbmetrische Charakterisierung und die Normierung von Bilderfassungsgeräten zu verstehen, die dem Ziel dient, aufgenommene Szenen in Szenen unter zuvor definierten(More)
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