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5832116 |
Method of extracting two edges of a road by active contour propagation
A method of extracting the contour of an object having two lateral edges, for example a road, from a digitized photographic image using an automatic active contour propagation process, comprises...
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5828849 |
Method to derive edge extensions for wavelet transforms and inverse wavelet transforms
A method derives edge extensions for wavelet transforms and inverse wavelet transforms of two-dimensional images. The method overcomes the necessity of side computations by treating the...
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5825910 |
Automatic segmentation and skinline detection in digital mammograms
Digital mammograms are automatically segmented into background, corresponding to the region external of the breast, and foreground, corresponding to the region within the breast, by the detection...
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5822469 |
Post-filter for improving halftone image sharpness
A post-filtering method and apparatus for increasing the high-frequency and edge information of halftoned images is described. If a continuous-tone (contone) image is processed by a halftoning...
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5818973 |
Apparatus for digital correction in an image system
An apparatus for digital correction in an image system is disclosed. The present invention comprises pre-processing means for automatically adjusting dc gain of an image signal; an...
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5812139 |
Method and apparatus for graphic processing including anti-aliasing and flicker removal
In order to reduce the amount of computation processing and simplify processing, a graphic processor apparatus includes a graphic signal generator circuit for generating video images such as...
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5805729 |
Procedure and equipment for production of line data
A process and apparatus for the production of line data from measurements correlated with specific characteristics of an object measured. The invention provides that the measurements thus obtained...
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5799111 |
Apparatus and methods for smoothing images
Improved spatial, temporal, and spatio-temporal noise reduction apparatus (10) and also apparatus for noise reduction in conjunction with one or several of the following functions: edge...
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5796856 |
Gap measuring apparatus and method
An apparatus and method to measure a gap width distance, specifically the distance between the lip of a coating hopper and the tangential edge of a coating roller or the support on the roller, is...
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5790269 |
Method and apparatus for compressing and decompressing a video image
Edge or contour information is extracted from an image array by filtering and encoded. In order to improve reproduction accuracy, two separate filters are used to detect edge information. One of...
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5781176 |
Image quality improvement on raster display
A structure with fine details, such as a periodic signal, is displayed on a raster display. To avoid aliasing due to an interference between the details and the columns and row pattern of the...
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5781665 |
Apparatus and method for cropping an image
A method and apparatus for cropping an image in digital form. The image to be cropped is represented as a first digital array which is operated on by an edge enhancement transformation to generate...
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5777758 |
Image processing apparatus and method for expanding color images based on block pixel and edge detection
A printer system amd method for printing a clear image. When black characters or characters printed in a black reverse are expanded, the contours thereof are printed in black only and the inside or...
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5774595 |
Contour approximation method for representing a contour of an object
A contour approximation method accurately reconstructs a contour of an object by adding an extra vertex to the complex contour segment based on a curvature of the pixels on the contour image. The...
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5771107 |
Image processor with image edge emphasizing capability
An image processor is provided which emphasis-processes an image to be copied with attention to the detection of black edges so that clear color copy outputs are obtained. R, G and B data read out...
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5761392 |
Process of making two adjacent uniformly colored objects appear with a diminished gap in between
A process is provided for avoiding a gap between adjacent uniform color objects in an image. First, it is first determined whether the image data contains two adjacent uniform color objects, each...
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5757982 |
Quadrantal scaling of dot matrix data
In its basic aspects, the present invention uses a 3×3 data window to examine and to convert data in a 2×-resolution enhancement. Data is altered from a linear 2×-expansion method if and when...
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5757382 |
Apparatus for tracing contours of segmented regions
An apparatus for tracing contours of segmented regions in an image includes a zero masking unit to produce a closed contour loop for each of the segmented regions, a tracing circuit for...
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5748800 |
Image reading device that selectively performs edge contrast adjustment
An image reading device selectively performs contrast adjustment on edge portions of the image, while suppressing contrast adjustment on noise and roughness of the image, thus obtaining a smooth...
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5748796 |
Fuzzy logic device for image noise reduction
A fuzzy device for image noise reduction, includes an interface adapted to retrieve the gray level of a pixel to be processed of an image and of neighbouring pixels; a difference circuit connected...
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5748798 |
Method and system for adding effects to gray scale images
The present invention enables application of the bold process to thicken the data or the outline process to hollow the inside of the data to leave the contour thereof to the gray scale data...
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5748799 |
Image processing method and apparatus
A filtering process is carried out on an original image, which is constituted of a lattice-like array of picture elements, that are located at predetermined intervals along the rows and columns of...
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5740268 |
Computer-aided method for image feature analysis and diagnosis in mammography
A method for automated detection of abnormal anatomic regions, wherein a mammogram is digitized to produce a digital image and the digital image is processed using local edge gradient analysis and...
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5737455 |
Antialiasing with grey masking techniques
A method of combining antialiased edges for printing or display at a grey level reproduction device, wherein pixels have shade values determined as a function of their neighbor's shade values and...
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5734746 |
Picture signal enhancement circuit includes a non-linear circuit for enhancing the picture signal in dependence of histograms measured at transitions in the picture signal
In a picture signal enhancement circuit having a circuit (3) for measuring a histogram and a non-linear processing circuit (1), coupled to the measuring circuit (3), for enhancing the picture...
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5729360 |
Color image processing method and system
A color image processing system for generating recorder image signals of four colors containing India ink from three color signals, the color image processing system includes a converter for...
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5719967 |
Iimage processing apparatus
An image processing apparatus capable of generating multivalue image data to be reproduced by a laser printer and the like as a hard copy having high visual quality. A first character/line drawing...
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5719958 |
System and method for image edge detection using discrete cosine transforms
The image processing system of the present invention provides electronic edge detection in keeping with ISO/JPEG/MPEG international compression standards for electronic imaging. Specifically, a...
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5717786 |
Apparatus for determining ridge direction patterns
From an image memory of a fingerprint picture, gradient vectors of the picture are calculated. And from distribution of gradient vectors in a subregion, ridge direction of the subregion are...
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5717793 |
High quality image size change
When enlargement processing is performed, binary image data inputted from a data line 100 is subjected to contour smoothing by a contour smoothing and enlarging circuit 2 and the data is enlarged...
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5710840 |
Image processing method and apparatus for adjusting the tone density of pixels based upon differences between the tone density of a center pixel and tone densities of peripheral pixels
An image processing method and apparatus capable of sufficiently emphasizing binary density image area without deterioration of the image quality of a gray-scale or middle tone image area. During...
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5706355 |
Method of analyzing sequences of road images, device for implementing it and its application to detecting obstacles
A method and system of analyzing sequences of road images taken by a camera carried on board of a vehicle. A luminance signal of the road images from which contours of the road are extracted is...
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5703968 |
Method and apparatus for detecting interpolation line
A level difference of an upper pixel on an upper scanning line placed over an attentional pixel and a lower pixel on a lower scanning line placed under the attentional pixel, a level difference of...
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5703965 |
Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening
An image represented in a first image array of pixels is first decimated in two dimensions before being compressed by a predefined compression algorithm such as JPEG. Another possible predefined...
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5699172 |
Image forming apparatus and method having a toner and ink saving feature
An image forming apparatus that is capable of saving developing agents such as toner and ink by reducing the number of dots in an image while ensuring that the characters and figures in the image...
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5696852 |
Image signal processing apparatus
An image signal processing apparatus of the present invention is an apparatus to process image signal, wherein an input image signal is corrected and made into a sharp and visually preferred image...
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5696851 |
Codeword-dependent post-filtering for vector quantization-based image compression
The quality of reconstructed images is improved by a post-processing method at the decoder which uses codeword-dependent, spatially-varying 2-dimensional filters. The post-filtering, working across...
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5692072 |
Edge detecting device
An edge detecting device with an image pickup unit for preparing an electric image signal from an optical signal from an object having edge information, a sampling device for converting the image...
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5689582 |
Image processing apparatus having image region designating function
When a frame marked with a marker pen in a black-and-white image is to be extracted, an intermediate-density portion present on a character edge portion is removed by a frame extracting circuit....
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5687251 |
Method and apparatus for providing preferentially segmented digital images
A method for providing a preferentially segmented digital image of a specimen image having predetermined characteristics and containing an object of interest. A specimen image is obtained through a...
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5684933 |
Method and apparatus for forming images using a pre and post smoothing bit thinning down process
According to the invention, video data which are incapable of sufficiently reducing toner consumption through thinning-down control inclusive of edge detection, is divided into unit elements to...
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5684600 |
Image processor for smoothing and differentiating periodic areas and character areas using coefficients
An image processor performs emphasis processings suitable for materials to be copied to produce clear copy outputs. The image processor has a digitizing circuit which outputs a digital signal...
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5666443 |
Image processor with edge emphasis of image data
Image data of an original image in a prescribed pixel matrix is subjected to edge emphasis. On the other hand, a maximum and a minimum of the image data are detected. Then, values of the image data...
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5666439 |
Outline discrimination and processing
An image processing method and apparatus extracts outline vectors from a binary image, by defining outline points at positions between white pixel area and black pixel area, closer to the black...
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5666213 |
Image data processing system and method realizing fine image with simple construction/procedure
A bit-map unit forms a bit map using given image data. A boundary recognizing unit recognizes characteristics of a boundary present between first type of pixels and second type of pixels...
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5647028 |
Massively parallel image restoration with preservation of sharp boundaries
An image restoration apparatus for reconstructing an actual image from a measurement field image containing noise, the apparatus including means for storing image data for a restoration field;...
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5644366 |
Image reproduction involving enlargement or reduction of extracted contour vector data for binary regions in images having both binary and halftone regions
When an image is input, that input image is separated into a halftone region, such as a photograph, and a binary region, such as a character/line. Contour vector data along an edge of the separated...
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5644513 |
System incorporating feature-oriented signal enhancement using shock filters
A method and apparatus for enhancing signals such as images, speech, remotely sensed data, medical, tactile, radar and audio. It proceeds by the construction of certain discrete approximations to...
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5638458 |
Automated method and system for the detection of gross abnormalities and asymmetries in chest images
A method for the automated detection of gross abnormalities and asymmetries in chest images, including generating image data from radiographic images of the thorax. The image data are then analyzed...
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5638463 |
Image-data processing system
A bit-map unit forms a bit map using given image data. A boundary recognizing unit recognizes characteristics of a boundary present between a first type of pixels and a second type of pixels...
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