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5602589 |
Video image compression using weighted wavelet hierarchical vector quantization
A weighted wavelet hierarchical vector quantization (WWHVQ) procedure is initiated by obtaining an N×N pixel image where 8 bits per pixel (steps 10 and 12). A look-up operation is performed to...
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5583952 |
Method and apparatus for representing an image by iteratively synthesizing high and low frequency components
An apparatus for decompressing an image that has been compressed by an image compression system in which the image is first repetitively filtered in one direction to produce a series of sub-images...
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5579412 |
Image processing apparatus
In an image processing apparatus, image data having a first resolution read from a first image memory is encoded by an arithmetic encoder and is converted into image data having a second resolution...
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5577134 |
Method and apparatus for encoding a segmented image without loss of information
An image processing system encodes a segmented or mosaic image into a set of fixed-length data packets, from which the segmented image may be reproduced with no significant loss of detail. The...
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5574802 |
Method and apparatus for document element classification by analysis of major white region geometry
A system for logically identifying document elements in a document image using structural models includes assistant function for users to describe the structural models, a geometric relationship...
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5568569 |
Method and apparatus for analyzing digital video images by merging displacement vectors
A method and apparatus for encoding a target image within a sequence of one or more digital motion video images using motion compensation. Displacement vectors are assigned to a plurality of blocks...
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5563960 |
Apparatus and method for emphasizing a selected region in the compressed representation of an image
In certain image analysis applications, it is desirable to compress the image while emphasizing a selected region of the image. The invention is a means for to allocating more bits, and thus better...
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5537493 |
Apparatus for compressing image data employing entropy encoding of data scanned from a plurality of spatial frequency bands
A data compression technique is described for use in systems employing frequency separation, such as wavelet separation, in which the sub bands (0 to 9) have different numbers of frequency...
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5533148 |
Method for restructuring physical design images into hierarchical data models
A method for restructuring information stored in physical design image form, such as an image of a layer in a semiconductor package, into a hierarchical area specification model useful in automated...
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5509088 |
Method for converting CCITT compressed data using a balanced tree
There is provided a method of processing an input data stream including compressed image data in which an extended tree, characterized by a plurality of words, is developed. Each word is associated...
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5500907 |
Image signal analyzing system
An image signal analyzing system capable of accomplishing shape analysis for processing or coding an image with easy, by space division using two orthogonal representative vectors, or by...
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5452104 |
Adaptive block size image compression method and system
In an adaptive block size image compression method and system for compressing image data, a respective method and system for further compressing the image data for transmission. Each block and...
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5446806 |
Quadtree-structured Walsh transform video/image coding
Two dimensional data structures are represented by quadtree codes with embedded Walsh transform coefficients. The quadtree code permits both variable block size inherent in quadtrees, and the...
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5384869 |
Image processing apparatus
Image processing apparatus is described for filtering a digital representation of a raster scanned image into a plurality of sub-bands in the two-dimensional spatial frequency domain, the...
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5379355 |
Data encoding using one or more adaptive decision trees
A method and apparatus for quantizing a stream of data at a predetermined bit compression ratio. A binary decision tree is established for classifying the error between a predicted and actual data...
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5335088 |
Apparatus and method for encoding halftone images
In accordance with the present invention, an apparatus is provided for encoding a selected halftone pattern to provide a corresponding signal with the selected halftone pattern including a set of...
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5333012 |
Motion compensating coder employing an image coding control method
A motion compensating coder which includes a control section for setting quantizer step size accounts for both the buffer occupancy and the texture of the image being coded. The coding control...
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5321776 |
Data compression system including successive approximation quantizer
A data processing system augments compression of non-zero values of significant coefficients by coding entries of a significance map independently of coding the values of significant non-zero...
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5315670 |
Digital data compression system including zerotree coefficient coding
A data processing system augments compression of non-zero values of significant coefficients by coding entries of a significance map independently of coding the values of significant non-zero...
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5282255 |
Method and apparatus for processing both still and moving visual pattern images
An improved method for coding and decoding still or moving visual pattern images by partitioning images into blocks or cubes, respectively, and coding each image separately according to visually...
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5280547 |
Dense aggregative hierarhical techniques for data analysis
A body of data is operated upon hierarchically in such a way that, at one or more levels of the hierarchy, the number of aggregative data items produced is not substantially less than the number...
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5278915 |
Method for hierarchical estimation of the movement in a sequence of images
The method consists in effecting a hierarchical decomposition of the image by levels of resolutions, (I 31 , I 32 , I 33 ; I 21 , I 22 , I 23 ; I 11 , I 12 , I 13 ; I), in estimating an overall...
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5241608 |
Method for estimating velocity vector fields from a time-varying image sequence
Changes in successive images from a time-varying image sequence of a scene are characterized by velocity vector fields. As estimate of the velocity vector field is determined as a compromise in the...
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5231676 |
Hierarchical operations on border attribute data for image regions
A hierarchy of border attribute data items is produced from a body of data such as the pixel values of an image. Each border attribute data item indicates an attribute of a border of an analysis...
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5228098 |
Adaptive spatio-temporal compression/decompression of video image signals
An adaptive spatio-temporal compression/decompression algorithm for a video image uses a quadtree hierarchy to represent each frame of the image, the quadtree hierarchy including intermediary nodes...
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5185813 |
Document image processing apparatus
A document image processing apparatus is provided, which comprises a structure analyzing unit for analytically dividing an input document image into sub-blocks having a specificed physical...
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5163104 |
Digital image processing technique including improved gray scale compression
An improved technique for gray scale compression of document image data is disclosed. The method comprises evaluating subportions of an image array as to relative levels of sameness and attempting...
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5122875 |
An HDTV compression system
Apparatus for encoding/decoding a HDTV signal for e.g., terrestrial transmission includes a compression circuit responsive to high definition video source signals for providing ierarchically...
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5122873 |
Method and apparatus for selectively encoding and decoding a digital motion video signal at multiple resolution levels
At least one selected image of a digital video signal is encoded at multiple levels of resolution. For each level of resolution, a correction image is formed by subtracting the value of each pixel...
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5109433 |
Compressing and decompressing text files
A method of compressing a text file in digital form is disclosed. A full text file having characters formed into phrases is provided by an author. The characters are digitally represented by bytes....
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5068911 |
Method and apparatus for representing an image
An improved image compression system is disclosed in which the image is first repetitively filtered in one direction to produce a series of sub-images. These sub-images are then repetitively...
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5060285 |
Hierarchical variable block size address-vector quantization using inter-block correlation
A vector quantization based image compression technique which exploits inter-block correlation and layered addressing structure to form variable block sizes. Without introducing any quality...
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5058186 |
Method and apparatus for image compression
In order to highly efficiently compress images of large quantity obtained by the photographing from a plurality of view points, provision is made of means for photographing a three-dimensional body...
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5057939 |
Data compression
A method of compressing digital image or image-like pixel data. The method comprises carrying out the following steps on small blocks of pixels: a) determining the differences between digital...
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5050230 |
Hybrid residual-based hierarchical storage and display method for high resolution digital images in a multiuse environment
An image processing method is described for the hierarchical storage and display of high resolution digital images in a multiuse environment. The method makes reduced resolution versions of the...
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5048111 |
Hybrid subband-based hierarchical storage and display method for high resolution digital images in a multiuse environment
An image processing method is described for the hierarchical storage and display of high resolution digital images in a multiuse environment. The method makes reduced resolution versions of the...
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5022091 |
Image processing technique
A novel method of image filtering to enhance the appearance of imagery, particularly synthetic aperture radar imagery. The invention uses detected edges to adaptively control the bandwidth of...
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5020120 |
Methods for reducing quantization error in hierarchical decomposition and reconstruction schemes
Methods to reduce the quantization error in the higher spatial resolution digital image signals of a hierarchical decomposition and reconstruction scheme are disclosed. The quantization errors in...
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5014134 |
Image compression method and apparatus
A system for compressing images is disclosed. The system utilizes a transformation which is equivalent to expanding the image using a system of wavelets having finite support.
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4947447 |
Method for data coding
Numerical data in a two-dimensional distribution for encoding picture data or voice data at high efficiency is divided into blocks being not equal in length depending on an amount of variation of...
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4944023 |
Method of describing image information
A method of describing an image made up of a plurality of kinds of regions in an n-dimensional space by a tree structure, comprises the steps of recursively and equally dividing the image into 2 n ...
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4873577 |
Edge decomposition for the transmission of high resolution facsimile images
A high resolution image is decomposed into a low resolution replica and into corresponding supplemental information for facsimile transmission to a remote location. The low resolution replica is...
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4870497 |
Progressive transmission of high resolution two-tone facsimile images
A high resolution image is decomposed to a basic lower resolution replica and a plurality of supplemental information fields for use in a progressive high resolution image facsimile transmission...
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4858017 |
System and method for hierarchal image encoding and decoding
Hierarchal encoding of an image is achieved by first deriving a picture element array of binary coded intensity values representing the image and then deriving from the intensity values of the...
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4831659 |
Method for image data coding
To efficiently compress image data, the image data is divided into rectangular blocks of non-equal length in a hierarchal structure in accordance with a brightness change, and is encoded into...
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4809347 |
Computer vision architecture
A computer architecture is disclosed for analyzing automatic image understanding problems. The architecture is designed so that it can efficiently perform a wide spectrum of tasks ranging from low...
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4751742 |
Priority coding of transform coefficients
Disclosed are methods and apparatus for prioritization of transform domain coefficient data representing sources such as, but not limited to, single images and images in motion, so as to produce a...
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4742558 |
Image information retrieval/display apparatus
According to an image information retrieval/display apparatus, an original image is represented by a hierarchical structure from a global image of high level to a local image of low level in...
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4729127 |
Method and system for compression and reconstruction of cultural data for use in a digital moving map display
A method and digital system for the compression and reconstruction of culal data for use with display systems, such as a system for producing a real time moving map display of terrain, provides a...
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4718104 |
Filter-subtract-decimate hierarchical pyramid signal analyzing and synthesizing technique
A pyramid frequency analyzing technique is taught in which an input sampled temporal signal is convolved with a spatially localized, gradual rolloff kernel weighting function, which is subtracted...
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