This Handbook was written to serve the needs of a growing community of researchers and practitioners in the fields of database systems, information retrieval, image and video processing, machine learning, data mining, human-computer interaction, among many others, and provide them with a comprehensive overview of the state of the art in this exciting area of video databases and applications. With contributions from more than 100 recognized world experts in the subject, it is an authoritative reference for most of the relevant research that is being carried out in this field. In addition to chapters that provide in-depth coverage of many topics introduced in this chapter, it showcases many novel applications and provides pointers to hundreds of additional references, becoming a one-stop reference for all the relevant issues related to video databases.