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<p><b>Abstract</b>—This paper presents a method for spatiotemporal segmentation of long image sequences of scenes which include multiple independently moving objects, based on the minimum description length (MDL) principle. First, a family of motion models is constructed, each of which corresponds to a physically meaningful motion such as translation with constant velocity or a combination of translation and rotation. Then, the motion description length is formulated. When an object changes the type of the motion or a new part of an object appears, the corresponding temporal or spatial segmentation is carried out. Ambiguous segmentation of two consecutive images can be resolved by minimizing the motion description length in a long sequence of images. Experiments on several real image sequences show the validity of our method.</p>
Long image sequence, spatiotemporal segmentation, motion estimation, MDL principle.

H. Gu, Y. Shirai and M. Asada, "MDL-Based Segmentation and Motion Modeling in a Long Image Sequence of Scene with Multiple Independently Moving Objects," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 18, no. , pp. 58-64, 1996.
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