Abstract
A method of scale-invariant recognition of three-dimensional (3-D) objects is presented. Several images of the observed scene are recorded under white-light illumination from several different points of view and compressed into a single complex two-dimensional matrix. After filtering with a single scale-invariant filter, the resultant function is then coded into a computer-generated hologram (CGH). When this CGH is coherently illuminated, a correlation space is reconstructed in which light peaks indicate the existence and location of true targets in the tested 3-D scene. The light peaks are detectable for different sizes of the true objects, as long as they are within the invariance range of the filter. Experimental results in a complete electro-optical system are presented, and comparisons with other systems are investigated by use of computer simulation.
© 2003 Optical Society of America
Full Article | PDF ArticleMore Like This
Youzhi Li and Joseph Rosen
J. Opt. Soc. Am. A 19(9) 1755-1762 (2002)
Natan T. Shaked, Gideon Segev, and Joseph Rosen
Opt. Express 16(22) 17148-17153 (2008)
José J. Vallés, Pascuala García-Martínez, and Carlos Ferreira
Appl. Opt. 47(4) A43-A51 (2008)