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5953461 |
Image emphasis processing method and apparatus
A morphology operation is carried out on an original image signal representing a radiation image, and a morphology signal is thereby obtained. An edge signal, which represents a characteristic...
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5949913 |
Method and apparatus for modifying multi-tone image
A mask area is specified as a target area of modification in a multi-tone image. The multi-tone image is converted to a plurality of binary images with a plurality of threshold values. A plurality...
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5949907 |
Window texture extraction for image analysis
A window texture extraction process for quantifying texture features in grey-level images and combining the quantified texture features with previously derived classification results. The...
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5949914 |
Enhancing the resolution of multi-spectral image data with panchromatic image data using super resolution pan-sharpening
The present invention discloses a super resolution pan-sharpening technique that is used to increase the resolution of a multi-spectral signal using a panchromatic signal. Typically, multi-spectral...
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5946420 |
Printing with text enhancement: recognition by sensing paired edges, or by disqualification in pictorial regions
Text is recognized in a scanned image, by sensing left and right edges, preferably in coincidence in all three color planes--or otherwise to determine edges in black. Such edge sensing is...
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5943439 |
Method and apparatus for generating an image areas using halftone processing, binary contouring, and dithering conversion techniques
A method and apparatus for separating picture image areas in facsimile machines, scanners, and other picture processing equipment, and more particularly to a method and apparatus for separating...
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5936682 |
Circuit for enhancing chrominance transitions in real-time video reception
A circuit for enhancing chrominance transitions in a received chrominance video signal comprises a linear-phase digital filter supplied with an input stream of discrete chromatic image elements....
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5933541 |
Method for processing decoded picture blocks in a block-based method of picture coding
The present invention relates to a method of filtering edges of a picture block with an edge-smoothing filter. The selection of the edge-smoothing filter depends on the size of the movement vector...
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5933529 |
Method of tracing a contour of an object based on background information of the object
A method for tracing a contour of an object in an image of a video signal, the image including object pixels and background pixels, indexes each of the background pixels; detects contour pixels;...
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5933528 |
Image processing apparatus
An image processing apparatus of this invention reads raster-scanning type binary image data, and causes an outline extraction unit to extract outline vectors of an image. When a white raster...
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5926577 |
Video signal processing apparatus with noise reduction and edge enhancement
A video signal processing circuit for processing a video signal including a noise is disclosed which comprises: an edge enhancement signal generation circuit for generating an edge enhancement...
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5926578 |
Image processor having a partial image preprocessor
Overall actual image data is divided into tiles, spatial frequency distribution states of respective tiles are analyzed, and three extracted images including an image (95A) having the maximum...
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5920653 |
Multiple spatial channel printing
A multiple spatial channel technique is described that can produce near continuous-tone output quality from an output device having a large, dilute dot channel, referred to as the L (lowpass)...
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5917955 |
Area recognizing device and gradation level converting device employing area recognizing device
A first converting circuit converts K-level image data, and suppresses a diffusion range of data by an N-level converting circuit. The N-level converting circuit converts a K-level image into an...
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5917956 |
Image processing apparatus capable of removing an edge portion from a multi-level color signal based on a binary color signal
An image processing apparatus comprising binarization means for converting a multi-level color signal into binary form, removal means for removing edge component from the multi-level color signal,...
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5912990 |
Image generation method and apparatus
An image generation method and an image generation apparatus can execute conversion from edge addresses into dot patterns at a high speed and a low cost. A comparator compares predetermined...
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5909221 |
Gray scaled data generating device which balances width and shade of strokes by repositioning their center line to a predetermined distance from pixel border
A gray scaled data generation device which generates characters and figures of a size which is a fixed number of pixels as gray scaled data, based on outline data which includes outline information...
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5905579 |
Image processing method and apparatus which separates an input image into character and non-character areas
An image processor accurately executes area separation using small block size image data. The image processor includes a wavelet transforming circuit which converts input image data into a...
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5903660 |
Automatic background recognition and removal (ABRR) in projection digital radiographic images (PDRI)
A system for removal of background from projected digital radiograph images utilizes statistical methods to identify background pixel candidates and probable background edges of a PDRI. Thresholds...
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5903681 |
Reducing edge artifacts on a digital printer
An arrangment is disclosed for reducing edge artifacts produced when printing a digital image on a digital printer, which printer is capable of producing multiple output levels, said digital image...
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5898464 |
Image outline enhancing method and circuit thereof
A method which can be used to enhance an outline of an image displayed in an image display apparatus such as a television receiver, and a circuit performing the method. The circuit includes a...
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5898797 |
Image processing system and method
A method and system for processing a digital image of an object comprises forming a single pixel image outline of the object in a digital image and producing a measure of the outline shape as a...
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5896469 |
Image sharpness processing method and apparatus
A gray edge component and RGB color components of each pixel in an original image are generated. Saturation of each pixel in the original image is evaluated, and a mixing ratio is determined...
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5892852 |
Image processing apparatus
An image processing apparatus includes a converter for reading out a manuscript image signal and converting the read-out signal to an electric signal. A signal processor executes signal processing...
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5886797 |
Method and apparatus for controlling a spatial filtering process based on characteristics of image data
A method and apparatus for controlling a MTF correction process using the reference pixel density and the edge amount of the reference pixel. An edge amount is a result of a high-pass filtering...
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5887085 |
Image processing device
An image processing device is provided with a scanning means which performs subscanning by a pitch corresponding to a width covering a number of pixels less than the number of detectable pixels by...
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5880767 |
Perceptual image resolution enhancement system
The present invention provides an effective, low cost method and system for enhancing various types of images including photograph, CD, video, and graphic art images. The method of enhancing the...
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5881164 |
Image data processing method and image data processing apparatus
An image data processing method by which stripped brightness non-uniformities of a very low contrast can be detected accurately from an input multiple-valued digital image data. The method includes...
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5878170 |
Method and apparatus for reconstructing contours in a contour image decoder
A contour of an object in an image having one or more objects therein is reconstructed based on encoded contour data for the contour and a previously reconstructed contour for an object included in...
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5875267 |
Fast digital image sharpening method and structure
An initial digital image is blurred to form a blurred image which is subtracted from the initial image in order to form a sharpened version of the initial image. Unidirectional blurs provide for...
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5872868 |
Technique for generating and storing edge phase information for rendering text and lineart in hyperacuity printers
A PDL or other type of line drawing program mathematically generates an edge between white and black regions. For curved edges, the edge is transformed into a plurality of piecewise linear edge...
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5870504 |
High speed outline smoothing method and apparatus including the operation of shifting bits of the current, preceding, and succeeding lines left and right
OCR processing involves: acquisition of images from image capturing devices; determination of location/size/style for each character; normalization; smoothing for large corners; smoothing by the...
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5867606 |
Apparatus and method for determining the appropriate amount of sharpening for an image
An image enhancing apparatus is described that includes a filter. The filter enhances the sharpness of an original image in accordance with a sharpening parameter. A sharpening parameter selection...
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5862266 |
Circuit for sharpening of edges of a pixel image in a color copier
A circuit for sharpening a pixel image includes M accumulators which provide a rolling sum for each of a sequence of image pixel values. Each rolling sum comprises the sum of pixel values in the...
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5862245 |
Method of extracting contours using a combined active contour and starter/guide approach
A semi-automatic method of extracting a contour in a digital image using a combined active contour and starter/guide approach is based on an iterative process of deforming an active contour to...
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5855433 |
Method of color halftoning using space filling curves
A method of color halftoning using stochastic screening includes clustering, performing error diffusion and applying an adaptive criteria to change the cluster size according to the variation of...
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5857037 |
Image processing method and apparatus
A digital image signal, which represents values of picture elements arrayed along X and Y directions of an image, is subjected to operation processing carried out with the formula ...
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5850293 |
Image processor having a discriminator for discriminating an inside area and an outside area
A digital image of a document having chromatic and achromatic colors is read, and an edge of a black character is discriminated. Further, an outside area and an inside area of the edge are...
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5848181 |
Image processing method, image processing apparatus, noise removing method, and noise removing apparatus
In an image processing apparatus, a uniform region whose luminance level change is small is correctly extracted from a noise-containing image. To this end, this image processing apparatus includes...
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5845007 |
Machine vision method and apparatus for edge-based image histogram analysis
A system for edge-based image histogram analysis permits identification of predominant characteristics of edges in an image. The system includes an edge detector that generates an edge magnitude...
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5841881 |
Label/window position detecting device and method of detecting label/window position
A label/window position detecting device includes a conveyor, light-emitting elements, a lens, linear image sensors, image processors, and coordinate calculation units. The conveyor conveys a...
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5838463 |
Binary image processor
A low cost binary image processor in an image processing apparatus designed to perform the shading correction and binarize the edge emphasis of an image with an automatic gain control according to...
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5835618 |
Uniform and non-uniform dynamic range remapping for optimum image display
A contexture dependent dynamic range remapping system utilizes background estimation, mask generation, parameter estimation and dynamic range remapping of an original image to provide an optimum...
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5835238 |
Phantom level edge enhanced error diffusion
A method and apparatus for converting an input image including a plurality of input pixels each having a number of possible input levels of optical density to an output image including a plurality...
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5835237 |
Video signal coding method and apparatus thereof, and video signal decoding apparatus
A video signal coding method and apparatus thereof and a video signal decoding apparatus of the present invention improves visual picture quality of a decoded image with higher compression rate...
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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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