The major use of holography in optical pattern recognition systems has been in matched spatial filter correlators. We discuss new uses of holographic techniques in optical pattern recognition applications. These include: optical pattern recoanition architectures of reduced size, weight and volume; optical pattern recognition architectures with reduced component tolerances; new nonlinear local optical preprocessing architectures; and optical pat-tern recognition systems that operate when geometrical and other differences are present in the input image.
"New Research In Holographic Pattern Recognition", Proc. SPIE 0353, Industrial and Commercial Applications of Holography, (7 July 1983); doi: 10.1117/12.933942; https://doi.org/10.1117/12.933942