[go: up one dir, main page]

Javidi et al., 1994 - Google Patents

Nonlinear joint transform correlators

Javidi et al., 1994

View PDF
Document ID
730983077830732862
Author
Javidi B
Wang J
Tang Q
Publication year
Publication venue
Pattern recognition

External Links

Snippet

A joint power spectrum based processor called joint transform correlator is presented. The joint power spectrum, which is the intensity of the Fourier transform of the input scene displayed alongside the reference function to be detected, contains the cross-power …
Continue reading at apps.dtic.mil (PDF) (other versions)

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING; COUNTING
    • G06E—OPTICAL COMPUTING DEVICES; COMPUTING DEVICES USING OTHER RADIATIONS WITH SIMILAR PROPERTIES
    • G06E3/00—Devices not provided for in group G06E1/00, e.g. for processing analogue or hybrid data
    • G06E3/001—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements
    • G06E3/003—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING; COUNTING
    • G06E—OPTICAL COMPUTING DEVICES; COMPUTING DEVICES USING OTHER RADIATIONS WITH SIMILAR PROPERTIES
    • G06E3/00—Devices not provided for in group G06E1/00, e.g. for processing analogue or hybrid data
    • G06E3/001—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements
    • G06E3/005—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements using electro-optical or opto-electronic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING; COUNTING
    • G06K—RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00—Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/74—Arrangements for recognition using optical reference masks
    • G06K9/741—Arrangements for recognition using optical reference masks using frequency domain filters, e.g. Fourier masks implemented on spatial light modulators
    • G06K9/743—Arrangements for recognition using optical reference masks using frequency domain filters, e.g. Fourier masks implemented on spatial light modulators characterised by the kind of filter
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING; COUNTING
    • G06K—RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00—Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/74—Arrangements for recognition using optical reference masks
    • G06K9/748—Arrangements for recognition using optical reference masks using spatial domain filters, e.g. joint transform correlators

Similar Documents

Publication Publication Date Title
Javidi et al. Nonlinear joint transform correlators
Fielding et al. 1-f binary joint transform correlator
US4892370A (en) Means and method for implementing a two-dimensional truth-table look-up holgraphic processor
US5111515A (en) Image deconvolution by a logarithmic exponential nonlinear joint transform process
Javidi et al. Multifunction nonlinear signal processor: deconvolution and correlation
Johnson et al. Analysis of a joint transform correlator using a phase-only spatial light modulator
Kuo Joint-transform correlator improved by means of the frequency-selective technique
Alam Phase-encoded fringe-adjusted joint transform correlation
Javidi et al. One-bit representation of a gray-scale nonlinear joint transform correlator
Shang Optimisation of filters for optical correlation of noisy images
Horache et al. Nonzero-order fringe-adjusted joint transform correlation using binary random phase mask
Javidi Image Deconvolution And Correlation By A Multifunction Nonlinear Signal Processor
Butler Production and Analysis of Computer-Generated Holographic Matched Filters.
DeCusatis et al. Wavelet image processing for optical pattern recognition and feature extraction
Javidi et al. Thresholding effects on the performance of the binary nonlinear joint transform correlators
Javidi Comparison Of Bipolar Nonlinear Correlators And Phase-Only Encoded Matched Filter Correlators
Psaltis et al. On the use of the Litton magneto-optic device in optical processors
Alam Efficient joint transform processor
Horner Robotic Vision In Real-Time Through Phase-Only Filtering
Sheng et al. Multiplexed binary phase-only circular harmonic filters
Cherri et al. Non-conventional joint transform correlation using grating filters and heterodyne scanning techniques for pattern recognition applications
Wang Frequency domain filtering strategies for hybrid optical information processing
Szoplik et al. Optical-digital processors for morphological and rank order filtering
Javidi et al. V: Pattern Recognition with Nonlinear Techniques in the Fourier Domain
Butt et al. Optimization of a binary filter by direct binary search algorithm for rotation-invariant JTC