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6690838 |
Image processing circuit and method for reducing a difference between pixel values across an image boundary
An image processing circuit includes a processor that receives at least a portion of an image including a boundary and first and second contiguous pixels disposed on opposite sides of the boundary,...
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6690842 |
Apparatus and method for detection and sub-pixel location of edges in a digital image
The invention provides a fast, computationally inexpensive, and highly accurate method and apparatus for edge detection in a digital image, even for edges that are not substantially parallel to the...
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6690827 |
Approximation method of shape data, information processing apparatus and medium
An shape data approximation method for reducing the amount of data with an adjacency relationship between a plurality of components maintained. The shape data is read, an adjacent region of the...
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6687402 |
Machine vision methods and systems for boundary feature comparison of patterns and images
The invention provides boundary-based machine vision methods and systems for comparing a pattern to an image. These contemplate the steps of finding points on a boundary in the image; identifying...
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6683984 |
Digital imaging device with background training
Various backgrounds, forms, or templates are scanned, features are extracted, and the features are stored in memory. When a composite image is scanned (image of interest plus part of background),...
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6683995 |
Method and apparatus for correcting large defects in digital images
An image processing system includes a defect correction system that identifies defective regions of a digital image using a defect map. The defect map is automatically created from an input image...
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6681047 |
Method and system for determining character edges based upon edges pair and image characteristics of pixels between the edge pair
The current edge pair determination system and method determine whether or not an edge pair and certain image characteristics of pixels between the edge pair as a whole or a unit is a part of a...
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6674919 |
Method for determining the skew angle of a two-dimensional barcode
A method of calculating a skew angle for a two-dimensional barcode, in which the horizontal or vertical edges within the barcode are located, preferably using a finite state recognizer, and an edge...
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6674906 |
Method and apparatus for detecting edges in a mixed image
A method and apparatus for detecting edges by which the detection of the edges of a natural image from an image obtained by mixing the graphic or text and the natural image is suppressed, to...
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6674904 |
Contour tracing and boundary detection for object identification in a digital image
An edge detection algorithm may use contour tracing followed by boundary detection to improve the accuracy of the detected boundaries and to enable the detection of boundaries in cases where the...
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6674903 |
Method for smoothing staircase effect in enlarged low resolution images
A method in the field of image enhancement is described for smoothing the staircase effect in electronic images. These staircases may be introduced by electronic zooming of an original image having...
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6674905 |
Image processing method, image processing apparatus, and storage medium
When a dispersion value of a shading value is equal to or more than a threshold value in the neighborhood of a standard point, it is determined that an image pattern has a texture dominant...
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6671395 |
Document image processing with stroke preservation and background suppression
A method for improved readability of digitally captured document images that include printed or handwritten textual material overlaid on background graphics. Text in the document is generally...
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6665440 |
System and method for performing corner guided curve matching of multiple images representing a scene
The present invention is embodied in a curve matching system and method that is guided by a set of matched corners. The corner guided curve matching produces a geometrical representation of the...
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6650777 |
Searching and filtering content streams using contour transformations
Methods and systems are provided for locating objects within a content stream, by transforming prospective objects and evaluating the results to identify meaningful semantic values. Transformation...
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6647148 |
Boundary line detecting method
In detecting a boundary line between areas different in light reflectance, it has so far been impossible to specify the boundary line at a distance shorter than the arrangement pitch of...
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6647142 |
Badge identification system
A method dynamically identifies a badge in a sequence of images of a scene acquired by a camera. Each image in the sequence includes a plurality of pixels, and each pixel has a color and an...
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6647147 |
Method for measuring fine pattern, apparatus for measuring fine pattern, and record medium that can store therein program to measure fine pattern and can be read by using computer
This at least comprises: a first step of capturing an image of a fine pattern; a second step of extracting a contour of the fine pattern from the image; a third step of capturing a standard figure...
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6643410 |
Method of determining the extent of blocking artifacts in a digital image
A digital image processing method determines the extent of blocking artifacts in a digital image by first forming a column difference image and averaging the values in the columns in the column...
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6640017 |
Method and apparatus for adaptively sharpening an image
Briefly, in accordance with one embodiment of the invention, a method of sharpening an image includes the following. A crispening parameter is adaptively computed for a captured image based, at...
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6633670 |
Mask generation for multi-layer image decomposition
To improve compression efficiency and decompressed image quality, images are decomposed into separate layers each containing a limited number of image element types (text, line art, or...
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6633663 |
Method and system for determining component dimensional information
A method and system for determining component dimensional information in a component placement system. The component information is derived from the pick and place equipment which is used to place...
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6625303 |
Method for automatically locating an image pattern in digital images using eigenvector analysis
A method for automatically locating instances of a specified image structure in digital images, comprising the steps of: providing a digital image; detecting simple features associated with the...
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6625316 |
Image processing apparatus and method, and image processing system
Of an object extracted from an image, it is difficult to separately process a main object and a secondary object, such as a shade, attached to the main object. If an object extracted from an image...
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6621927 |
Apparatus for detecting position of featuring region of picture, such as subtitle or imageless part
A boundary position detection apparatus in which the position of an imageless part (containing no meaningful image information) lying at the upper part or/and the lower part of a picture is...
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6621924 |
Contour extraction apparatus, a method thereof, and a program recording medium
There is provided a contour extraction apparatus and a method thereof by which candidate data of a plurality of subjectively evaluable contour curves can be presented to a user by obtaining an...
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6621928 |
Image edge detection method, inspection system, and recording medium
An inspection system which includes a memory for storing image data provided by picking up an image of a workpiece, a monitor for displaying the image data stored in the memory on a display screen...
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6618501 |
Object similarity calculation method and apparatus
Although methods employing chain codes or Fourier descriptors are known for calculating an outline similarity between a model image and an object image, these methods are difficult to achieve...
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6614940 |
System, method and computer program product for generic outline font compression
A system, method and computer program product are provided for compression of characters. Upon receipt of a plurality of characters, at least one test is performed on the characters to determine if...
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6608916 |
Automatic detection of spine axis and spine boundary in digital radiography
A system and method for automatically detecting a spinal axis and spinal boundaries from an image, in accordance with the present invention, includes scanning an input image in at least two scan...
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6608942 |
Method for smoothing jagged edges in digital images
A method of smoothing jagged edges in graphical data. The method detects one or more edge of a selected pixel in the graphical data, dependent upon intensities of the selected pixel and another...
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6606420 |
Method and apparatus for digital image darkness control in saturated image structures
A method and apparatus for the control of darkness/lightness in a digital image rendered by a printing system. An original image containing antialiased edges is initially thresholded and filtered...
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6600832 |
Image processing method and image processing apparatus including replacing color image input data with achromatic color data
An edge detection/color determination portion detects edges using a Sobel filter and makes color determination, to output a black edge judgment signal. A characteristic quantity...
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6600839 |
Non-linear adaptive image filter for filtering noise such as blocking artifacts
A filter reduces artifacts, such as grid noise and staircase noise, in block-coded digital images with image block boundaries. The type of filtering is determined after an estimation of the image...
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6584221 |
Method for image retrieval with multiple regions of interest
A method for representing an image in an image retrieval database first separates and filters images to extract color and texture features. The color and texture features of each image are...
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6577763 |
Document image recognition apparatus and computer-readable storage medium storing document image recognition program
A document image tilt detection unit extracts a set of elements forming a character from a document image, extracts candidates for horizontal and vertical lines based on the character elements,...
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6577758 |
Image position detection technique in which input parameters can be easily determined
A position detection tool in a machine vision system finds the position of target objects in a digital image using the length and width of the target object as parameters. The input length and...
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6574353 |
Video object tracking using a hierarchy of deformable templates
A hierarchy of deformation operations is implemented to deform a template and match the deformed template to an object in a video frame. At each level, the constraints on the template deformations...
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6571006 |
Methods and apparatuses for measuring an extent of a group of objects within an image
Methods are disclosed that measure the extent of a group of objects within a digital image by comparing signature, representative of the relationship of the objects to one another, against...
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6559974 |
Image processing method and apparatus with correcting image data features
An image forming apparatus and method includes an image data correcting feature. The image processing apparatus is configured to correct the image data based on the image type. The image processing...
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6556709 |
Method and method for characterizing objects within an image
A method for characterizing objects within an image is presented. According to an embodiment of the present invention, a representative color of an object is first identified from an image. The...
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6548804 |
Apparatus for detecting an object using a differential image
An object detecting apparatus including an imaging section, an extracting section for extracting edge images from image signals supplied from the imaging section, a forming section for forming a...
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6549646 |
Divide-and-conquer method and system for the detection of lung nodule in radiological images
A divide-and-conquer (DAC) method and system improve the detection of abnormalities, like lung nodules, in radiological images via the use of zone-based digital image processing and artificial...
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6542635 |
Method for document comparison and classification using document image layout
Document type comparison and classification using layout classification is accomplished by first segmenting a document page into blocks of text and white space. A grid of rows and columns, forming...
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6539114 |
Image processing apparatus
An image processing apparatus having an image judgement section for judging whether or not a specific pattern image is included in at least a part of the image data input from an image input...
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6535254 |
Method and device for noise reduction
A method of reducing noise in a video signal which includes a plurality of video frames being composed of a plurality of pixels, the method comprising the steps of: comparing video information...
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6535213 |
Curve edition system, curve-loop detecting system, curve-loop removing system
Two curves indicating the border of an object in an image are simply edited and loops formed owing to edition of the curves indicating the border of an object in an image are detected and removed....
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6532304 |
Matching geometric objects
A system is disclosed for identifying matching arcs in sets of geometric objects, such as a pair of electronic maps, without relying on attributes being assigned to the arcs. An arc in a first set...
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6532310 |
Removing noise caused by artifacts from a digital image signal
Noise in digitized image data is reduced by providing an array of pixels for each of which a gray level has been determined. For each column of the array, a distribution of gray levels is derived,...
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6529635 |
Shape-based image compression/decompression using pattern matching
A method and apparatus for compressing a digitized image. Boundaries of regions within a digitized image are identified. Shapes are selected from a bank of shapes based on the identified boundaries...
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