Title :
Computing spatiotemporal surface flow
Author :
Allmen, Mark ; Dyer, Charles R.
Author_Institution :
Dept. of Comput. Sci., Wisconsin Univ., Madison, WI, USA
Abstract :
It is observed that arc length of a contour does not change if that contour is moved in the direction of motion on the surface. A function measuring arc length change is defined. The direction of motion of a contour undergoing motion parallel to the image plane is shown to be perpendicular to the gradient of this function. This gradient approximates the direction of motion when object motion in the scene is not parallel to the image plane or when perspective projection is used. This method has been implemented and is shown to compute the ST (spatiotemporal) surface flow in sequences of edge images and gray level images
Keywords :
computer vision; computerised picture processing; computer vision; contour; edge images; function measuring arc length change; gray level images; spatiotemporal surface flow computing; Cameras; Equations; Geometrical optics; Graphics; Image motion analysis; Layout; Length measurement; Optical computing; Spatiotemporal phenomena;
Conference_Titel :
Computer Vision, 1990. Proceedings, Third International Conference on
Conference_Location :
Osaka
Print_ISBN :
0-8186-2057-9
DOI :
10.1109/ICCV.1990.139490
