There are algorithms used for segmenting objects in images, and most of them can provide good quality segmentation results. In this book, we select the most popular segmentation algorithms and apply them to segment depth maps of stereo video sequences for driver assistance. The goal is to segment the potential threatening objects from the background and warn the driver about the potential accident and assist the driver with driving task under the critical situation. People who are interested in the topics of object segmentation, object segmentation in depth maps and driver assistance may want to read this book.