A method has been developed to calculate 2-D motion in a sequence of time-varying images. The method, called motion detection using randomized Hough transform (MDRHT), is based on the randomized Hough transform (RHT). The RHT decreases considerably the time consumption and memory requirements of the Hough transform. The idea of the MDRHT is to pick randomly point pairs from two images and calculate the translation with them. The points can be e.g. edge points of the original images. This approach can avoid difficulties of standard segmentation methods like overlapping and covering, and has the advantages provided by the RHT. The method can be generalized by picking more than two points. After a brief review of the RHT applied to motion detection, the extended algorithm to calculate both translation and rotation is represented in this paper.
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