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7613356 |
Position and orientation detection method and apparatus
The present invention provides a method and apparatus for inputting a signal indicating a change in position of an image sensing apparatus to predict present position and orientation of the image...
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7599568 |
Image processing method, apparatus, and program
A blur checking region is determined by selecting a region in which a blur tends to clearly appear in a digital photograph image as the blur checking region. Then, an image of a region...
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7474800 |
Method and apparatus for removing image compression artifacts
A method and apparatus from removing image compression artifacts includes comparing a center pixel value with a perimeter pixel value to generate a compare pixel value. The compare pixel value is...
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7414795 |
Method for driving display with reduced aging
A method of driving a display having a plurality of light-emitting elements that change with time or use, comprising the steps of: a) displaying first and second image signals having spatially...
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7369276 |
Multi-level halftoning providing improved texture uniformity
A method for multi-level halftoning an input digital image to form an output digital image which includes a multi-level error diffusion halftoning process incorporating periodic dither signals...
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7342696 |
Computational moiré compensation
The amount of moiré in halftone printed images is reduced using unique moiré intensity functions and moiré vectors in a halftoner. In various embodiments, moiré phase angle zones are determined...
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7339627 |
Method and system for automatic detection and display of aspect ratio
Certain embodiments of the invention may be found in a method and system for automatic aspect ratio detection and may comprise scanning lines in at least a selected portion of an image and locating...
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7333119 |
System and method for virtual coverage anti-aliasing
A graphics system has a mode of operation in which real samples and virtual samples are generated for anti-aliasing pixels. Each virtual sample identifies a set of real samples associated with a...
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7289667 |
Method and apparatus for enhancing a digital image by applying an inverse histogram-based pixel mapping function to pixels of the digital image
A method and associated device wherein an inverse histogram based pixel mapping step is combined with an edge enhancement step such as unsharp masking. In such an arrangement the inverse histogram...
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7145693 |
Image processing apparatus and method
In ink-jet printing apparatuses having a monochrome head which is longer than a color head, if a monochrome image is processed as a color image, the printing speed cannot be improved. Accordingly,...
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7027637 |
Adaptive threshold determination for ball grid array component modeling
A method for determining a number of balls in a projection space comprises determining a projection of a portion of a ball grid array, determining at least one local maximum of the projection space...
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7019756 |
Apparatus and method for brightness control
A brightness control apparatus comprising a probability density function (PDF) calculator to calculate a PDF based on pixel values of respective pixels of an input image signal, a first setter to...
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7016086 |
Image forming apparatus
Image data provided from a scanner is simultaneously supplied to page memory and a reference value calculating section. The reference value calculating section creates a density histogram of the...
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6961476 |
Autothresholding of noisy images
The present invention provides to image processing methods that include a method of selecting an optimal threshold value (t o ) for an image comprising the steps of: obtaining an image; selecting a...
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6771388 |
Halftone gradation processing method and apparatus
A halftone gradation processing method reduces or eliminates the discontinuous gradation reproduction in comparison with conventional error diffusion. A halftone gradation processing method...
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6415052 |
Color image processing apparatus
A color image processing apparatus for digitally reading a color document and effecting digital printing comprises a character region extracting device for extracting a character region of the...
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6381374 |
Histogram analysis method for defective pixel identification
A technique is disclosed for identifying potentially defective circuitry associated with discrete pixel regions in an imaging system detector. Signals representative of the pixels in an image...
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6282325 |
Image processing technique for binarizing an image scanned by a shuttle type scanner
In an image processing technique for binarizing an image scanned by a shuttle type scanner in a multifunctional machine using a small amount of memory, after scanning pixels of one slice from a...
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6266156 |
Area judging apparatus
The read out image data is stored in the mask memory in a predetermined mask unit, and binarized into binary value with a predetermined threshold in the binarizing circuit. The binarized image data...
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6212303 |
Method and module system for high speed processing of item images
A system and method for processing image data from a document and for producing a compressed binarized version of the image data for transmission to or use by subsequent users. Processing of the...
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6181437 |
Image processing apparatus capable of producing images without jaggies at edges
Image data for continuous three pixels delayed by one pixel from each other is input in row and column directions from an image input portion into a scanning window. A predetermined image pattern...
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6154568 |
Image processing apparatus for processing a bi-level image and method therefor
A bi-level image is pre-processed by dividing the image into rectangular blocks, and rearranging the dots in each rectangular block into a pattern determined by the density of black dots in the...
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6071004 |
Non-linear digital filters for interlaced video signals and method thereof
A structure and a format for providing a video signal encoder under the MPEG standard are provided. In one embodiment, the video signal interface is provided with a decimator for providing input...
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6009206 |
Companding algorithm to transform an image to a lower bit resolution
What is disclosed is a mapping circuit configured to map a range of captured intensity values to a companded intensity level based upon the density of captured intensity values present in the...
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5995676 |
Comparator-based thresholding method for determining data values
Embodiments of the invention include a method and apparatus for determining values for data reproduced or retrieved from data storage media such as in holographic memory systems. The method...
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5982945 |
Image processing method and apparatus for correlating a test image with a template
The image correlation method and apparatus correlates or matches a test image with a template. The image correlation apparatus includes an image processor for partitioning the template into a...
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5982944 |
Adaptive vision system using dual thresholding
Image analysis methods and systems are used for identifying objects in a background by defining a data space, such as a histogram or a color space. The data space comprises a plurality of...
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5982318 |
Linearizing offset cancelling white balancing and gamma correcting analog to digital converter for active pixel sensor imagers with self calibrating and self adjusting properties
A novel analogue to digital (A/D) converter semiconductor integrated circuit intended for digitizing signals generated by a physical stimulus sensing electronic apparatus, and more particularly,...
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5963665 |
Image enhancing method using mean-separate histogram equalization and a circuit therefor
An image enhancing method using a mean-separate histogram equalization method is disclosed. An input image signal is divided into two sub-images in a picture unit according to a mean level of the...
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5949905 |
Model-based adaptive segmentation
A machine vision method is provided for segmenting an image based on an adaptive thresholding approach that exploits prior knowledge of the characteristics, such as area, of the object to be...
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5883973 |
Method and apparatus for processing a document by segmentation into text and image areas
A multi-stage, preprocessing technique increases the quality of a monochrome or colored mixed-mode document printed on a binary-type printer. The document is preferably apportioned into a plurality...
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5805723 |
Image processing apparatus with means for adjusting image data for divided areas
An object of the present invention is to provide an image processing apparatus that reads density unevenness contained in the image, based on the base density of the image data and performs density...
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5784500 |
Image binarization apparatus and method of it
A binarization circuit compares the density value of the target pixel with the density value of surrounding pixels in the vicinity. A judging unit judges whether or not the target pixel is isolated...
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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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5781658 |
Method of thresholding document images
A method of multithresholding a document image considers both local and global information in determining the number of thresholded levels contained in a gray-scale image. A gray-scale image is...
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5748802 |
Method and apparatus for the analysis and correction of the image gradation in image originals
A method and apparatus for the analysis and correction of the image gradation of an image original to be reproduced by evaluating image values acquired by point-by-point and line-by-line,...
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5724444 |
Image forming apparatus
An apparatus comprising a scanner, a histogram preparation circuit, a circuit for analyzing a histogram to calculate a background density of a document and a character density, a circuit for...
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5710640 |
White-level correction circuit
A white-level correction circuit for an analog-to-digital converter which converts an analog image signal of a pixel, which is input from an external source, to digital image data based on...
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5699452 |
Method and system of identifying a valid object in a background of an image using a gray level co-occurrence matrix of the image
The present invention relates to an image analysis method and system for identifying objects in a background by generating a description, which in this case is a co-occurrence matrix, of the gray...
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5657401 |
Method and apparatus for measuring noise using a plurality of noise estimates
In a method of measuring noise in image signals, a number of noise estimates (SAD) is calculated (1). Subsequently, it is determined (3-9) which noise estimation interval [A, B] out of a plurality...
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5651077 |
Automatic threshold determination for a digital scanner
A computer-based system and method automatically determines a threshold level for each cell of a digital document having one or more cells. Each cell of the document has a plurality of pixels and...
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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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5621815 |
Global threshold method and apparatus
The problem of thresholding is considered from a clustering point of view and a novel weight-based clustering method (WCThresh) is implemented in a neural network image processor 50. The neural...
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5608823 |
Image reading apparatus for correcting density levels
An image reading apparatus includes an image sensing unit for photoelectrically reading an original image, and outputting an image signal, a converter unit for converting the image signal from the...
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5568571 |
Image enhancement system
This specification discloses a process and system for processing a digitally stored image on a digital computer. The system scans and digitizes an image, separate text from non-text components,...
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5559899 |
Method for the adaptive quantization of a range of input values
A method for the adaptive quantization of the range of input values on the basis of the histogram method for estimating density. Input values are read-in and assigned to a quantization of the range...
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5448651 |
Texture discrimination method
To reliably discriminate the characters only from the headlines having any background textures, the present invention analyzes the projection profile of a grey image in a headline area in order to...
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5434931 |
System and method for picture image processing employing transformation of picture data
A method of picture image processing, and system for carrying out same, involves generation of a composite mapping function, for transforming gray scale values to different values in order to...
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5400415 |
Binarizing method and apparatus therefor
A binarizing method for converting an image picked up by a television camera into a binary image based on a binarization level used as a threshold, includes a first step of finding a maximum value...
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5351313 |
Binarization method
A binarization method obtains an optimum threshold value for binarization which is used when converting a multi-level image data which describes an input image into a black-and-white bi-level image...
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