White-light density pseudocolor encoding with three primary colors
F. T. S. Yu, X X Chen, Tien‐Hsin Chao · Journal of Optics · 1984
Describes a technique for generating density pseudocolor encoding with three primary colors using a white-light optical processor. Spatial encodings are made with positive, negative, and a product of 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 and offers a wide range of applications. Since coherent sources are not utilized, the color coded image is free from coherent artifact noise. Experimental demonstrations of this density pseudocolor encoder are provided.