This is the first book to treat the analysis of 3D dynamic scenes using a stereovision system. Several approaches are described, for example two different methods for dealing with long and short sequences of images of an unknown environment including an arbitrary number of rigid mobile objects. Results obtained from stereovision systems are found to be superior to those from monocular image systems, which are often very sensitive to noise and therefore of little use in practice. It is shown thatmotion estimation can be further improved by the explicit modeling of uncertainty in geometric objects. The techniques developed in this book have been successfully demonstrated with a large number of real images in the context of visual navigation of a mobile robot.