Abstract: Motion estimate is a prominent source of dynamical scene analysis in image sequences.For a number of problems involving image sequences,it is essential to have a good motion estimate.The main goal of 3-D motion estimate based on image sequences is to get object's position,motion parameters and structure information from related scene in a series of asynchronous frames.Several traditional motion analysis techniques based on image sequences are evaluated in this paper.Furthermore,the research direction of 3-D motion estimate based on image sequences is discussed.