Abstract

An optical spatial filtering system is described which color encodes the local spatial frequency content of an image. It is shown that partially coherent illumination has advantages over coherent or incoherent illumination in this system. Experimental results are shown which indicate that the system can be used to perform a simple type of texture-to-color conversion. The system could be used to enhance textural differences for a human observer or as a preprocessor which provides texture related information to a second image processing device.

© 1978 Optical Society of America

Real-time white light spatial frequency and density pseudocolor encoder

F. T. S. Yu, S. L. Zhuang, T. H. Chao, and M. S. Dymek
Appl. Opt. 19(17) 2986-2990 (1980)

Spatial frequency pseudocolor encoding using coarse gratings

D. Courjon, J. Bulabois, and C. Mered
Appl. Opt. 23(10) 1642-1646 (1984)

Spatial frequency pseudocoloring by interference: application to texture

L. Dettwiller and P. Chavel
Appl. Opt. 23(10) 1647-1654 (1984)

New technique of pseudocolor encoding of holographic imaging

F. T. S. Yu
Opt. Lett. 3(2) 57-59 (1978)

Pseudocolor encoding of holographic images using a single wavelength

Poohsan N. Tamura
Appl. Opt. 17(16) 2532-2536 (1978)