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7492948 |
Generation of a desired wavefront with a plurality of phase contrast filters
The present invention relates to a method and a system for synthesizing an intensity pattern based on generalized phase contrast imaging. The phase filter contains a plurality of phase shifting...
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7483571 |
Apparatus and method for the construction of spatial representations
A method and apparatus for constructing spatial representations of referents is provided. The method and apparatus have application in any area where a spatial representation of a referent is...
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7317814 |
Authentication system and method
An authentication system using a correlator that correlates an input with a reference wherein at least one of the input and reference comprises a phase volume mask having structures, preferably...
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7302100 |
Method for increasing detectable light energy without changing shape content in radial and angular or rotational analysis of images for shape content and matching
A segmented radial spatial light modulator has an active optic area comprising a plurality of radially extending active optic modulators disposed at various angular orientations with respect to a...
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7298908 |
Method and apparatus for detecting the presence of one or more images of a known predetermined kind of scene
An apparatus for detecting the presence of one or more images of a known kind in a scene is disclosed which comprises a digital input means and an optical output means. The digital input means...
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7103223 |
Apparatus and method for radial and angular or rotational analysis or images for shape content and matching
A segmented radial spatial light modulator has an active optic area comprising a plurality of radially extending active optic modulators disposed at various angular orientations with respect to a...
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6844947 |
All-optical holographic code division multiple access switch
A technique for processing optical input signals to produce optical output signals using only a single hologram for a plurality of circularly shifted code words used to encode the input signals. A...
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6717699 |
Method for hybrid printing
The present invention relates to a system and method for ink-jet printing. More specifically, the present invention is directed to a system and method useful for ink-jet printing onto textiles....
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6618138 |
Scanning fluorescent systems for various diagnostic
An angularly multiplexed store contains filters derived from prior examination of input image reference samples, a spectrum analyzer produces spectral data representing the frequency spectrum of...
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6480273 |
Multispectral imaging system and method
A multispectral imaging system ( 1 ) and method utilize an optical processor ( 3 ) for simultaneously comparing an input wavelength spectrum observed in a single spatial pixel in a scene image from...
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6445822 |
Search method and apparatus for locating digitally stored content, such as visual images, music and sounds, text, or software, in storage devices on a computer network
A method for searching for and comparing images includes allowing a user, software application, computer system, etc., to create, identify, select, provide, or otherwise produce one or more...
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6415047 |
Optical feature extraction apparatus and encoding method for detection of DNA sequences
The invention is an optical feature extraction apparatus which uses video display, spatial light modulation, and detection components in conjunction with microlenslet replicating optics, to...
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6360012 |
In situ projection optic metrology method and apparatus
Wavefront information for an optical system is calculated based on the intensity of an image of a plurality of gratings having different periods and orientations taken from at least two different...
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6345127 |
Video data compression preprocessor using holographic optical correlation and feedback
A method and apparatus for compressing video data images uses optical processing techniques. The method and apparatus perform holographic optical correlation and apply holographic optical...
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6330361 |
Adaptively aligned optical correlator and method
An improved optical correlator using a coherent light beam employs a method of adaptive alignment. A test pattern modulates an input spatial light modulator. The modulated beam propagates through...
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6226391 |
Fingerprint classification via spatial frequency components
The present invention is a method and apparatus for automatically placing a first unknown image, such as an unknown fingerprint image, into one of a plurality of categories. The invention includes...
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6137896 |
Method of recognizing faces using range images
Faces are one of the most commonly recognized features among people. According to the invention a system for recognizing intensity images of faces is provided. Intensity images of a face are...
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6014219 |
Method and system for evaluating the quality of holograms
The image quality of a hologram is evaluated by measuring the spacial distributions of luminance of an image reconstructed from the hologram and an object recorded thereon, normalizing the...
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5943170 |
Adaptive or a priori filtering for detection of signals corrupted by noise
A method for pattern recognition and localization using a joint transform correlator and joint transform correlator. The method includes providing a joint image of a reference image and an input...
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5933530 |
Image recognition apparatus using image enhancement processing
An image recognition apparatus which is capable of mounting many function such as an image enhancement and image recognition processes into one chip, for thus processing an image processing...
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5862258 |
Method for distinguishing between objects using mace filters
A pair of matched filters describing a pre-selected category of objects is ade, each of the filters having a center located at a unique place in the filter. When incorporated into a MACE filter and...
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5844709 |
Multiple quantum well electrically/optically addressed spatial light modulator
A multiple quantum well spatial light modulator combines both optically addressed and electrically addressed portions on a single wafer. The electrically and optically addressed portions may be...
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5841489 |
Phase-only optically-addressed type spatial light modulator
In a spatial light modulator of the present invention, a photoconductive layer formed of photoconductive material receives write light having a spatial distribution in its intensity and changes...
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5815598 |
Apparatus for identifying an individual based on a fingerprint image
In an individual identification apparatus, a hologram 11 recorded on a card is irradiated with laser light to read out a fingerprint image of a specific person. A finger of an arbitrary person to...
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5815597 |
Binary encoding of gray scale nonlinear joint transform correlators
A joint Fourier transform optical correlator is disclosed which can have varying degrees of nonlinearity and yet employ a readily available binary spatial light modulator for producing the...
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5790691 |
Method and apparatus for robust shape detection using a hit/miss transform
An apparatus and method for detecting anomalies morphologically detecting regions of interest. The apparatus and method include a region of interest (ROI) detection unit which morphologically...
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5740276 |
Holographic method for encrypting and decrypting information using a fingerprint
A method using a fingerprint image as a cipher for optical encrypting and decrypting information which is presented in the form of an analogous signal. The method includes recording a Fourier...
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5724447 |
Optical transform system for three-dimensional object recognition
An image processing method and apparatus in which a range image of a three-dimensional object is obtained, and the inclination of a plane contained in the range image and an approximate area of the...
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5694495 |
Image sensing device and image sensing method
In an image sensing apparatus, an array of two-dimensional matrix of photosensitive devices is used to detect an image. Each photosensitive device comprises a photosensor accumulating carriers when...
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5675670 |
Optical processor using an original display having pixels with an aperture ratio less than that for pixels in an operation pattern display
A optical processor facilitates the alignment between an original image and transformation patterns, thus improving the operation accuracy, and, if a fixed transmission mask is to be used,...
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5633944 |
Method and apparatus for automatic optical recognition of road signs
A process and device for automatic recognition of an object such as a road sign includes a laser beam source providing a laser beam capable of passing through a modulator on which an intensity...
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5600485 |
Optical pattern recognition system method of ferroelectric liquid crystal spatial light modulator
An high-speed, high-resolution optical pattern recognition system which automatically recognizes or measures a specified pattern from two-dimensional images comprises an image display device for...
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5581383 |
Arrangement for optical autocorrelation
An arrangement for optical autocorrelation of laser speckle photography (LSP) photographs or particle image velocimetry (PIV) photographs using optical Fourier transforms is disclosed. The object...
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5528702 |
Optical pattern recognition apparatus with coordinate conversion function
An optical pattern recognition apparatus has an optical coordinate converter unit which simultaneously and in parallel converts an entered reference image and an entered input image from an entered...
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5497433 |
Optical information processing apparatus and method for using computer generated hologram
An input image of an object is optically Fourier-transformed and after coordinate-transforming the Fourier-transformed input image optically to obtain a rotation-invariant and scale-invariant...
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5363455 |
Optical information processor
A visual recognition apparatus for use in, for example, a robot requires an optical information processor for performing image processing or image recognition. The optical information processor...
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5323472 |
Optical image analyzer using optical correlation and opto-electronic feedback
An apparatus and method for image analysis utilizing an optical-electronic hybrid device. A light source generates light through an alternating series of lenses and electronically addressable...
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5257322 |
Method and apparatus for pattern recognition and display with optical correlator
A pattern recognition method and apparatus wherein an optical correlator and a feedback light path are provided. In the optical correlator, an input pattern whose image is formed on a first spatial...
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5239595 |
Optical method for identifying or recognizing a pattern to be identified
A method of obtaining a correlation between a pattern to be identified and a number of reference patterns by irradiating and displaying the pattern to be identified and the reference patterns on an...
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5185815 |
Multiple target correlator system
A multiple target correlation system for unambiguously detecting, locating and determining the orientation of an array of multiple targets or objects. The multiple target correlator provides a...
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5175775 |
Optical pattern recognition using multiple reference images
An optical pattern recognition method which can be applied to a joint transform correlator operative to effect correlation processing between a plurality of reference images and at least a single...
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5173954 |
Spatial light modulation device and image reconstructing apparatus using the same
A spatial light modulation device includes a spatial light modulation tube and converts a one-dimensional photoelectron image into a two-dimensional electron image, rotating the two-dimensional...
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5148496 |
Optical correlator with symmetric reflective optics
A discoid optical correlator system having a plurality of reflective optical components, a source of electromagnetic radiation, such as visible light, and an output detector which are positioned...
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5119443 |
Nonlinear joint transform optical correlator having varying degrees of nonlinearity
In a nonlinear joint transform image correlator, the Fourier transform interference intensity is nonlinearly transformed to provide higher correlation peak intensity and a better defined...
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5086483 |
Optical processor including electronic processing array
A hybrid optical/electronic processor for determining the presence of a feature of interest in an input image. The system includes an optical processor for convolving the input image with a target...
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5060282 |
Optical pattern recognition architecture implementing the mean-square error correlation algorithm
An optical architecture implementing the mean-square error correlation algorithm, MSE=Σ[I-R] 2 for discriminating the presence of a reference image R in an input image scene I by computing the...
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5020111 |
Spatial symmetry cueing image processing method and apparatus
An optical correlation method and apparatus recognizes and locates specific patterns in a scene based on the spatial symmetries associated with that pattern. An input scene is divided into two...
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4980922 |
System for output plane calibration of an optical correlator
A system for calibrating the output correlation plane of an optical correlator for positional and nonlinearity information to determine the position of an input image in an input image plane of the...
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4972498 |
Alignment system for an optical matched filter correlator
As multiple matched filter memories for optical correlators increase in size, their design, fabrication and alignment becomes increasingly complex and critical for proper operation of the optical...
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4949389 |
Optical ranked-order filtering using threshold decomposition
A hybrid optical/electronic system performs median filtering and related ranked-order operations using threshold decomposition to encode the image. Threshold decomposition transforms the nonlinear...
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