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In this paper a motion detection system based on fuzzy reasoning is presented. Each pixel of a frame of the sequence is attempted to be classified as belonging to one of four classes (moving, still, uncovered background, covered background). The classes are treated as fuzzy sets, and as such, they are characterized by membership functions. After an initialization step, the degree of membership of each pixel to each class is refined by the application of a reasoning module driven by a set of fuzzy rules. Such fuzzy rules are designed so that the spatio-temporal correlation of image sequences is exploited by integrating information extracted from a small spatio-temporal neighborhood. The proposed system results to be flexible, thanks to the use of the reasoning approach (rules can be easily changed), and robust, thanks to the use of fuzzy logic.

Integration of spatio-temporal information for motion detection by means of fuzzy reasoning