Color encoding for polychromatic single-channel optical pattern recognition.

The common multichannel system for recognizing colored images is replaced by a color-encoded single-channel system. Amethod inspired by the Munsell color system is used for encoding the different colors as phase and amplitude functions. It is shown that for many practical cases the phase information part of the color code is sufficient for obtaining good results. An implementation based on a liquid-crystal television panel that works in a phase-modulation mode is suggested. Computer simulations that demonstrate the capabilities of the suggested method are given as well as a comparison with previously published multichannel performance.

[1]  Y Fainman,et al.  Statistical recognition of color images. , 1987, Applied optics.

[2]  A. B. Vander Lugt,et al.  Signal detection by complex spatial filtering , 1964, IEEE Trans. Inf. Theory.

[3]  J L Horner,et al.  Signal-dependent phase distortion in optical correlators. , 1987, Applied optics.

[4]  Jumpei Tsujiuchi,et al.  A complex synthetic discriminant filter for the parallel recognition of color patterns , 1988 .

[5]  D. R. Pape,et al.  Characteristics Of The Deformable Mirror Device For Optical Information Processing , 1983 .

[6]  Charles F. Hester,et al.  Phase-phase implementation of optical correlators , 1990, Other Conferences.

[7]  Carlos Ferreira,et al.  Matched filter and phase only filter performance in colour image recognition , 1989 .

[8]  N Ohyama,et al.  Use of color image correlation in the retrieval of gastric surface topography by endoscopic stereopair matching. , 1988, Applied optics.

[9]  Carlos Ferreira,et al.  Multichannel colour pattern recognition using a minimum average correlation energy filter , 1994 .

[10]  Don A. Gregory,et al.  Optical Correlation With Phase Encoding And Phase Filtering , 1988, Optics & Photonics.

[11]  Toshio Honda,et al.  Color image correlation for spatial/spectral recognition and increased selectivity , 1988 .

[12]  E Marom,et al.  Phase-only modulation with twisted nematic liquid-crystal spatial light modulators. , 1988, Optics letters.

[13]  Dennis H. Goldstein,et al.  Phase-encoding input images for optical pattern recognition , 1994 .

[14]  Toshio Honda,et al.  Color image correlation , 1987 .

[15]  Carlos Ferreira,et al.  Experimental results in color pattern recognition by multichannel matched filtering , 1992 .

[16]  Francis T. S. Yu Color Image Recognition By Spectral-Spatial Matched Filtering , 1984 .

[17]  Tomoaki Eiju,et al.  Phase-only modulation using a twisted nematic liquid crystal television. , 1989, Applied optics.

[18]  Chii-Maw Uang,et al.  Phase modulation depth for a real-time kinoform using a liquid crystal television , 1993 .

[19]  B Javidi,et al.  Color object identification by monochromatic binary correlation. , 1988, Applied optics.