Title: Multisensor data Fusion for Video Surveillance Abstract: The lecture aims to give an outline of multisensor automatic surveillance systems. In the first half, after an overview of their historical evolution, the general physical and logical architecture of automatic video surveillance systems will be presented and the main processing steps discussed. Examples and algorithms for motion detection, blob extraction and classification, tracking, object and event recognition will be presented together with real-world video sequences. In the second half, the extension to the multisensor case will be addressed. The concepts of data and sensor fusion will be introduced, and their application to surveillance illustrated. A multisensor architecture that dynamically regulates the fusion process to take into account the performance of the sensors in detecting the targets will be discussed. A step further will also consider contextual information as an optimization means. The remaining part of the lecture will cover the most interesting and active research areas with comments on future directions.