Title :
Analysis of optical flow constraints
Author :
Bimbo, Alberto Del ; Nesi, Paolo ; Sanz, Jorge L. C.
Author_Institution :
Dept. of Syst. & Inf., Florence Univ., Italy
fDate :
4/1/1995 12:00:00 AM
Abstract :
Different constraint equations have been proposed in the literature for the derivation of optical flow. Despite of the large number of papers dealing with computational techniques to estimate optical flow, only a few authors have investigated conditions under which these constraints exactly model the velocity field, that is, the perspective projection on the image plane of the true 3-D velocity. These conditions are analyzed under different hypotheses, and the departures of the constraint equations in modeling the velocity field are derived for different motion conditions. Experiments are also presented giving measures of these departures and of the induced errors in the estimation of the velocity field
Keywords :
constraint handling; estimation theory; image sequences; motion estimation; 3-D velocity; computational techniques; constraint equations; gradient based techniques; image plane; motion conditions; optical flow constraints; velocity field estimation; Brightness; Differential equations; Estimation error; Geometrical optics; Image analysis; Image motion analysis; Motion analysis; Optical computing; Optical filters; Velocity measurement;
Journal_Title :
Image Processing, IEEE Transactions on
