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1 March 1990 Real-Time Estimation of 2-D Motion for Object Tracking
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Proceedings Volume 1193, Intelligent Robots and Computer Vision VIII: Systems and Applications; (1990)
Event: 1989 Symposium on Visual Communications, Image Processing, and Intelligent Robotics Systems, 1989, Philadelphia, PA, United States
An algorithm capable of estimating the image motion of a moving object in real-time is described. Our method is based on the image correlation technique. But unlike previous approaches, we estimate the motion along the image gradient direction only. As the result we obtain the normal flow vector. This approach allows us to avoid difficulties often arise due to the multiple matching. Normal flow vectors are used to estimate the actual flow vector (often called full flow vector) by assuming that the 2-D motion is locally constant in a small neighborhood. This process requires solving a linear system of order 2 only. This entire process operates uniformly on several spatial resolutions of image sequence. Each resolution is tuned to a specific range of image motion, and the correct resolution is determined by comparing the confidence which has been computed in the course of full flow estimation.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. R. Maeng and K. Wohn "Real-Time Estimation of 2-D Motion for Object Tracking", Proc. SPIE 1193, Intelligent Robots and Computer Vision VIII: Systems and Applications, (1 March 1990);


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