Abstract
Presents a method that uses as components a dispersive element (prism or grating) and a gray spatial filter. The dispersive element produces a multitude of laterally shifted spatial frequency spectra in the Fourier domain. A suitable gray transparency in the Fourier plane assigns to every spatial frequency a typical wavelength. Hence, the texture of the object can be color encoded in the image. In a second experiment the filter is computed such that one out of two different patterns appear red and the other green. This experiment is an extension of Wiener filtering.