Abstract

The spatiotemporal Fourier transform of a series of frames is proved to be an attractive technique for object velocity determination. The main disadvantage of the spatiotemporal transform methods is that they require a long processing time even when fast transforms are used. We show that the spatiotemporal Fourier-transform technique, which has been applied to standard-light-intensity images, can also be used with low-light-level images. The result is an important processing time reduction; thus when fast processing is required, it would be advantageous to detect in low-light-level conditions with intensity filters. The technique behavior for low-light-level images is checked with computer-simulated and experimental data.

© 1995 Optical Society of America

Joint transform correlator subtracting a modified Fourier spectrum

Martin Schönleber, Gregor Cedilnik, and Hans-J. Tiziani
Appl. Opt. 34(32) 7532-7537 (1995)

Stabilized nonlinear regression for interferogram analysis

James S. Slepicka and Soyoung S. Cha
Appl. Opt. 34(23) 5039-5044 (1995)

Analysis of Fourier synthesis holography for imaging through scattering materials

E. Arons and D. Dilworth
Appl. Opt. 34(11) 1841-1847 (1995)

Group-delay tracking in optical stellar interferometry with the fast Fourier transform

Peter R. Lawson
J. Opt. Soc. Am. A 12(2) 366-374 (1995)

Optical Fourier processor and point-diffraction interferometer for moving-object trajectory estimation

Pierre M. Lane and Michael Cada
Appl. Opt. 38(20) 4306-4315 (1999)