Algorithms for ground based optical detection of space debris

Optical detection of space debris is a technical challenge from the point of view of the observations as well as of the data processing. The most promising technique for ground based optical observations consists of using CCD detectors in combination with specially tuned digital image processing techniques. We present observation scenarios and image processing algorithms allowing to recognize the faint trailed images of the moving debris in front of the stellar background. After a discussion of the detection limits the technique will be illustrated by observations of a debris object in the geostationary ring.