Signal-to-noise ratio exceeds that of monochromatic correlator. Achromatical optical correlator uses multiple-pinhole diffraction of dispersed white light to form superposed multiple correlations of input and reference images in output plane. Set of matched spatial filters made by multiple-exposure holographic process, each exposure using suitably-scaled input image and suitable angle of reference beam. Recording-aperture mask translated to appropriate horizontal position for each exposure. Noncoherent illumination suitable for applications involving recognition of color and determination of scale. When fully developed achromatical correlators will be useful for recognition of patterns; for example, in industrial inspection and search for selected features in aerial photographs.


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    Titel :

    Achromatical Optical Correlator


    Beteiligte:
    Chao, Tien-Hsin (Autor:in) / Liu, Hua-Kuang (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1989-07-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Liquid-Crystal Optical Correlator

    Liu, Hua-Kuang | NTRS | 1989


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    Acousto-optical/Magneto-optical Correlator Or Convolver

    Liu, Hua-Kuang / Davis, Jeffrey A. | NTRS | 1989



    Compact optical correlator for roadsign recognition

    Guibert, L. / Keryer, G. / Pellat-Finet, P. et al. | British Library Conference Proceedings | 1992