Title :
On the detection of motion and the computation of optical flow
Author :
Duncan, James H. ; Chou, Tsai-Chia
Author_Institution :
Maryland Univ., College Park, MD, USA
fDate :
3/1/1992 12:00:00 AM
Abstract :
A method for the detection of motion in image sequences is presented. In this method, the intensity history at each pixel is convolved with the second derivative in time of a temporal Gaussian smoothing function. The zero crossings in a single frame of the resulting function indicate the positions of moving edges. Intensity changes in time due to illumination effects do not produce zero crossings; thus, they are not interpreted as motion by the present method. It is also shown that the spatial and temporal derivatives of this function can be used to compute the component of the optical flow that is normal to the zero-crossing contours. This computation is also insensitive to nonconvective temporal and spatial variations in the image intensity that are caused by illumination effects
Keywords :
lighting; optical information processing; pattern recognition; picture processing; illumination effects; image intensity; image sequences; moving edges; optical flow; pattern recognition; spatial variations; temporal Gaussian smoothing function; temporal variations; zero crossings; Convolution; History; Image edge detection; Image motion analysis; Image sequences; Lighting; Motion detection; Optical computing; Optical devices; Smoothing methods;
Journal_Title :
Pattern Analysis and Machine Intelligence, IEEE Transactions on
