Encoding 3D correlation in an optical processor

Three-dimensional correlation of color images can be optically implemented by encoding three-dimensional functions in two-dimensional signals. We consider the following two techniques, to interlace the different channels of the color image, or to put them side by side. Both encoding techniques permit to obtain the 3D correlation but they have different characteristics when implemented in an optical correlator. We study the different characteristics concerning encoding and crosstalk effects. Experimental results comparing the two techniques are given.

[1]  M J Yzuel,et al.  Optical pattern recognition based on color vision models. , 1995, Optics letters.

[2]  Carlos Ferreira,et al.  Color-invariant character recognition and character-background color identification by multichannel matched filter , 1991, Optics & Photonics.

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

[4]  Juan Campos,et al.  Rotation invariant color pattern recognition by use of a three-dimensional Fourier transform. , 2003, Applied optics.

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

[6]  Juan Campos,et al.  Optical Color Pattern Recognition with High Discrimination Capability Using Binary Amplitude Phase-Only Filters , 1999 .

[7]  J Campos,et al.  Color pattern recognition with circular component whitening. , 1996, Optics letters.

[8]  C Ferreira,et al.  Circular-harmonic minimum average correlation energy filter for color pattern recognition. , 1994, Applied optics.

[9]  J Campos,et al.  Detection theory approach to multichannel pattern location. , 1997, Optics letters.

[10]  Juan Campos,et al.  Colour pattern recognition by three-dimensional correlation , 2000 .

[11]  Claudio Iemmi,et al.  Convergent optical correlator aligment based on frequency filtering. , 2002, Applied optics.

[12]  Juan Campos,et al.  Phase and amplitude modulation of elliptic polarization states by nonabsorbing anisotropic elements: application to liquid-crystal devices. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[13]  Performance of a noisy phase-only matched filter in a broad spectral band optical correlator. , 1986, Applied optics.

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

[15]  Fapeng Yu,et al.  Color signal correlation detection by matched spatial filtering , 1983 .

[16]  Francis T. S. Yu,et al.  Real-time joint spectral-spatial matched filtering , 1984 .

[17]  M. Yzuel,et al.  Phase-only filtering on the three-dimensional Fourier spectrum of color images. , 2003, Applied optics.

[18]  Claudio Iemmi,et al.  Optical encoding of color three-dimensional correlation , 2002 .