Ts. Denney et Jl. Prince, FREQUENCY-DOMAIN PERFORMANCE ANALYSIS OF HORN AND SCHNUCKS OPTICAL-FLOW ALGORITHM FOR DEFORMABLE MOTION, IEEE transactions on image processing, 4(9), 1995, pp. 1324-1328
A frequency domain performance analysis of Horn and Schunck's optical
flow (HSOF) algorithm for estimation of deformable motion is presented
Noise sources in the algorithm are modeled using the discrete Fourier
transform of the brightness pattern. This noise model along with the
estimation error covariance function derived in previous work is used
to derive an expression for the expected performance of the optical fl
ow estimate that is valid for an arbitrary discrete brightness pattern
. Simulation results are presented that demonstrate the validity of ou
r methods and show that HSOF is more accurate that the optical how est
imate of Anandan for certain low-frequency patterns.