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5046116 Symbol analyzing system and method with data exclusion and confidence factors  
A symbol analyzing system processes spectral power data of an input test symbol for deriving line width and line count information about the symbol, and for generating a reliability confidence for...
4989257 Method and apparatus for generating size and orientation invariant shape features  
A system extracts a set of size invariant, rotation invariant features from pixel data of a character and sends the set of features to a statistical decision tree to effectuate automatic...
4987450 Electrophotographic printer comprising aligned plural light emitting devices  
There is disclosed an electrophotographic printer for projecting light from light source emitted according to image data onto a photoconductive body performing a mechanical scan operation in a...
4941185 Image processing  
A method and apparatus for processing a first (e.g. half-tone) image constituted by a second (e.g. continuous tone) image convolved with a periodic (screen) function, to produce the second image is...
4933872 Method and system for wavefront reconstruction  
Method and system for wavefront reconstruction from an image plane intensity distribution profile. An imaging device may be an agent for producing the image plane intensity distribution profile,...
4903314 Single plate compact optical correlator  
A single plate compact optical correlator which utilizes a single photographic plate, along with suitable reflectors, wherein the single photographic plate has recorded thereon a multiple...
4901019 Three-dimensional imaging  
Images of, e.g., a vascular tree, are obtained in a shorter-than-usual time by deliberately undersampling the object, which results in aliasing, and then processing the undersampled data to...
4881270 Automatic classification of images  
A method and system for classifying a raster scanned target image by collapsing the image into a vector corresponding to a horizontal line of the image, mathematically transforming this vector into...
4851984 Method and system for localization of inter-rib spaces and automated lung texture analysis in digital chest radiographs  
A method and system for automated analysis of digital radiographic images in which regions-of-interest (ROI's) are first determined, and subsequently analyzed for abnormalities. To locate the...
4843631 Pattern recognition process  
A process for analyzing a two-dimensional image, wherein the structural identity of stored reference patterns with image contents or portions is determined, irrespective of the position of said...
4817176 Method and apparatus for pattern recognition  
A method and apparatus for recognizing an unknown character, pattern, or indicia, or the like as being a particular one of a group of known reference characters, patterns, indicia, or the like. In...
4792231 Laser speckle imaging  
Satellite imaging through a turbulent atmosphere is provided at better than turbulence-limited resolution using laser speckle statistics on reflections of orthogonal spatially periodic illumination...
4780831 Graphic data processor  
A graphic data processor for processing two-dimensional signals or one-dimensional signals such as observed graphic data. One graphic data processor includes circuitry for effecting two-dimensional...
4768156 Imaging system  
An improved imaging system has applications to synthetic aperture radar, inverse synthetic aperture radar, delay-doppler radar, positron-emission topography sonar, radiometry and other applications...
4764973 Whole word, phrase or number reading  
The image of a word is taken and the two-dimensional discrete Fourier transform of the image is computed. The transformed image is filtered to the first three harmonics, with both real and...
4764974 Apparatus and method for processing an image  
The specification discloses an apparatus and method for processing an image as part of a fast Fourier transform (FFT) operation. An image processor includes a first and second memory, each for...
4703349 Method and apparatus for multi-dimensional signal processing using a Short-Space Fourier transform  
A method and apparatus for representing a multi-dimensional, finite extent, information containing signal in a locally sensitive, frequency domain representation employs transforming the digital...
4674045 Filter for data processing  
An imaging method and apparatus having a new and improved data filter. In one application of the invention computed tomography number inaccuracies are avoided by use of a new filter function...
4631691 Video display device simulation apparatus and method  
A video display device may be simulated using a computer and a conventional video image processor. A test image which is an enlarged version of a typical image to appear on the simulated display...
4624367 Method and apparatus for determining conformity of a predetermined shape related characteristics of an object or stream of objects by shape analysis  
In its simplest sense, the present invnetion contemplates a method and apparatus for determining a characteristic or property of randomly oriented, irregularly shaped objects by obtaining an image...
4618990 Edge enhancement filtering for digital fluorography images  
For edge enhancement of a digitized fluorographic image, the original image is stored in a full frame memory. When each video vertical blanking pulse occurs time delays are initiated corresponding...
4616318 System for reprojecting images using transform techniques  
Systems and methods are presented for reprojecting images which comprise taking the two-dimensional Fourier transform of the image, interpolating the transform in order to obtain the values on...
4606004 Apparatus for reduction of filtration truncation errors  
Apparatus for reduction of filtration truncation errors caused by convolving a plurality of input signals, such as line-integral projection data obtained in a computerized tomography (CT) scan of...
4573197 Method for automatic recognition of two-dimensional shapes  
A method of automatically recognizing objects in a digital image. The pixel coordinates of the boundary of the objects are identified and stored as data. A series of Fourier coefficients describing...
4558462 Apparatus for correcting image distortions automatically by inter-image processing  
An apparatus for automatically correcting image distortions by inter-image processing, which is arranged to obtain, prior to performing the inter-image processing of two two-dimensional digital...
4513441 Image comparison system  
Image comparison is accomplished by forming a composite image composed of a reference image and a test image. A two-dimensional image spectrum is generated from the composite image and then is...
4490851 Two-dimensional image data reducer and classifier  
This invention relates to surveillance and counter-surveillance classificon of military vehicles using one-dimensional analysis of the target images. A two-dimensional image is digitized into a n...
4487476 Method of multivariant intraclass pattern recognition  
A method of recognizing different perspective views or images (i.e., multivariant views) of the same object (i.e., intraclass patterns). Each intraclass pattern, or different representation of the...
4454610 Methods and apparatus for the automatic classification of patterns  
Methods and apparatus for the automatic classification of patterns are disclosed in which the intensity or gray level values of selected pixels of digital images of functions of position-invariant...
4446521 Image reconstruction apparatus and process  
An image reconstruction apparatus of the present invention comprises units for measuring projection data from a number of angular directions within an angular range less than 180° with respect to...
4308521 Multiple-invariant space-variant optical processing  
A multiple-invariant, space variant optical processor in which two functions described by any number of separate distortion parameters can be correlated with no loss in signal-to-noise ratio of the...
4254400 Image data processor  
An image data processor for recognizing the degree of variation in the object in the image by dividing an image plane into a plurality of block regions and by sequentially comparing an input image...
4225850 Non-fingerprint region indicator  
Signalling means for enhancing the performance of automatic fingerprint identification systems by reducing system response to non-fingerprint-like regions within an image field pattern of interest....
4223345 Method and apparatus for camouflage signature measurement  
A method and apparatus for measuring the extent of camouflage applied to a arget is disclosed. The apparatus includes a direct electronic Fourier transform device responsive to first and second...
4213036 Method for classifying biological cells  
A means of probing a biological cell sample with a optical source to determine the characteristics of the cell image by way of measuring parameters from its two dimensional Fourier transform. These...
4164788 Super-resolution imaging system  
The resolution of an imaging system is greatly enhanced by radiating an object with a plane wave field from a coherent source variable in either frequency, angle or distance from the object,...
4112415 System for optically entering, displaying and decoding handwritten symbols  
An optical data entry and display system for decoding handwritten symbols into a data processing code is disclosed. The system comprises a television monitor for displaying decoded and otherwise...
4099207 Direct electronic fourier transforms of optical images  
Method and apparatus for directly converting between optical images and the spatial Fourier transforms of optical images by interacting sound waves and light. Controlled sound waves couple with...
4084255 Positional, rotational and scale invariant optical correlation method and apparatus  
A method and electro-optical apparatus for correlating two functions, f 1 (x,y) and f 2 (x,y) which are shifted, scaled and rotated versions of each other without loss of signal-to-noise and...
4073010 Correlation methods and apparatus utilizing mellin transforms  
Correlation methods and apparatus are disclosed which make use of Mellin transforms that are scale and shift invariant. There is no loss in the signal-to-noise ratio of the correlation, and data is...
4063281 Motion detection employing direct Fourier transforms of images  
Method and apparatus for directly converting between an image and the spatial or temporal Fourier transform thereof. To convert an image into its Fourier transform representation, the image...
4016413 Optoelectronic means for one-dimensional integral transforms of two dimensional information  
The invention concerns an analog TV-type process and apparatus for rapid cessing of pictorial information. A transparency is rapidly scanned by a line of light source, scanning of which is...
3993976 Method and apparatus for pattern analysis  
A technique and apparatus for two dimensional pattern analysis utilizing a transform of the pattern enables the extraction of desired pattern information by means of spatial filtering in accordance...
3869697 Pattern identifying systems  
A system for identifying two-dimensional patterns. According to this system, a pattern which is to be identified is positioned at a reading location and a Fourier transformation image of the...
3846752 CHARACTER RECOGNITION APPARATUS  
Character recognition apparatus wherein projection pattern signals obtained by projecting the density distribution of a printed or typed character on two axes orthogonal to each other are...
3786180 FOURIER TRANSFORMING SYSTEM  
A Fourier transform of a two-dimensional scene may be made by viewing that scene with a television camera. The output of the scene modulates a source of coherent light, which is then divided into...
3624605 OPTICAL CHARACTER RECOGNITION SYSTEM AND METHOD  
A system and method for identifying an unknown character by superimposing two coherent light beams containing diffraction patterns of an unknown and a reference character. The two light beams have...
3599147 CHARACTER RECOGNITION SYSTEMS AND APPARATUS  
Method of and apparatus for effecting recognition of patterns, especially written or printed characters in which a representation of the pattern in incoherent light, moving electrons or other...
3209250 Apparatus and method for inverse fourier analysis of electrical transients  
3074634 Pattern recognition  
Matches 251 - 300 out of 301 < 1 2 3 4 5 6 7 >