White-light pseudocolor density encoding through contrast reversal.
A simple technique of pseudocolor density encoding of photographic image by white-light processing is described. Spatial encodings are made through positive and negative photographic-image transparencies, and the pseudocoloring is obtained by color filtering of the smeared Fourier spectra. The technique is simple, versatile, and economical to operate. Since coherent sources are not used, annoying coherent artifact noise can be eliminated. Spatial color encoding uses the entire Fourier spectrum; therefore, this technique offers no apparent resolution loss. Simple experimental demonstrations of this technique are provided.
Chao
T H
TH
Electrical and Computer Engineering Department, Wayne State University, Detroit, Michigan 48202, USA.
Zhuang
S L
SL
Yu
F T
FT