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6795582 |
Method for processing a stream of pictures
The invention relates to a method and an apparatus for processing a stream of pictures. The method comprises the steps of selecting a first portion of pictures from a stream of pictures fulfilling...
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6795584 |
Context-based adaptive variable length coding for adaptive block transforms
A method and system for coding an image using context-based adaptive VLC where transform coefficients are partitioned into blocks having a block dimension of 4n×4m (with n, m being positive...
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6795583 |
Image data compression employing embedded compression and decompression codes
An image data compression technique is provided for compressing an image data stream by selection of one or more compression algorithms from a set of candidate algorithms. Key code representative...
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6792156 |
Data compression device of digital recoding system and data compression method for using a data compression device for compressing input image data
Disclosed is an input image data compressor which comprises an image recording controller for generating image information on respective input objects from the input image data, generating image...
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6792151 |
Image data compression employing optimal subregion compression
An image data compression technique includes division of an image data stream into a plurality of subregions and optimal compression of each subregion. The subregions may represent adjacent pixels...
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6792153 |
Image processing method and apparatus, and storage medium
Compressed image data is input, and it is checked according to the attributes of that image if the compression ratio of the compressed image is to be changed by a compression ratio determination...
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6792535 |
System and method for digitally marking a file with a removable mark
A system enables encoding of a removable mark into digital data, and decoding of the mark from the digital data. The system comprises an encoder and a decoder. The encoder includes a target area...
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6785424 |
Encoding method and apparatus for compressing a data structure having two or more dimensions, decoding method, and storage medium
On the basis of a bit sequence of a given command code, it is determined to which of repetition, copying and raw-data substitution the bit sequence applies. Based upon the result of the...
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6785422 |
Image processing apparatus utilizing pixel values of peripheral pixels adjacent the subject pixel
The present invention relates to an image processing apparatus, and to realize improved lossless compression of images more efficiently. A first predictor 11 generates a prediction signal P out...
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6782135 |
Apparatus and methods for adaptive digital video quantization
A video quantizer provides for performing quantization adaptively in accordance with perceptual masking characteristics of the human visual system. In a preferred MPEG encoder-IC, a block-based...
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6782134 |
Transmission apparatus of video information, transmission system of video information and transmission method of video information
The present invention provides a transmission apparatus for video information that allows wireless transmission of video information at a low rate regardless of differences in OSs. A transmission...
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6775416 |
System and method for inserting information in DCT coefficient domain
A system for inserting an increased amount of information into DCT coefficients generated in blocks from image data is disclosed. Additional information is first inserted into input DCT...
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6774824 |
Encoding device and method for encoding digital image improved by requantization of a predetermined subbit plane
There is provided a digital image encoding device which can enhance image compression performance while maintaining an image quality. When coefficient bits are decomposed/aligned in four encoded...
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6775415 |
Fractal image compression using reinforcement learning
A method for fractal image compression using reinforced learning is disclosed. The reinforced learning algorithm improves the performance of fractal image compression algorithms by improving image...
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6771825 |
Coding video dissolves using predictive encoders
In predictive encoders that support both intra-frame and inter-frame coding, the coding of intermediate dissolve frames (i.e., those falling between the first and last dissolve frames) is...
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6771830 |
Differential pulse code modulation image compression with varying levels of quantizers
A method and apparatus for encoding a digital image is disclosed. A difference is calculated between a first sample from a current scan line and a corresponding second sample from a previous scan...
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6766492 |
Finite state automaton for control of frame error recovery for a universal serial bus video camera
A video apparatus and method are described for controlling video frame error recovery in a streaming video session. Frame error recovery is activated and deactivated by a frame error recovery...
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6760480 |
Apparatus and method of encoding an image using a statistical model based on pixels
A decoder decodes encoded binary image data on each block in order to recover a target block of the binary image. The image decoder includes motion compensated blocking which obtains a reference...
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6760478 |
Method and apparatus for performing two pass quality video compression through pipelining and buffer management
An apparatus and method for performing two-pass real time video compression is provided. Tactical decisions such as encoding and quantization values are determined in software, whereas functional...
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6757436 |
Methods and apparatus for data compression based on modeling schemes
The invention provides a plurality of compression schemes that provide improved compression ratios. An exemplary embodiment compresses each pixel by one of a plurality of different entropy-based...
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6748117 |
Image decoding apparatus using pixel values from at least three reference pixels
An image coding apparatus including a blocking unit for blocking an image signal having plural pixel values corresponding to a single image display region into blocks each comprising a number of...
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6744927 |
Data communication control apparatus and its control method, image processing apparatus and its method, and data communication system
In video conference system terminals, the conventional difficulty in high-quality display of facial expressions of a plurality of participants is solved. In a multipoint connection device...
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6744926 |
System and method to compress image data using fixed and variable length compression
When document image data are compressed, the data are divided into blocks including a plurality of adjacent pixels and are compressed according to attribute of the block in the unit of block. A...
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6744919 |
Classification of blocks for compression based on number of distinct colors
An image of a compound document is processed by accessing a plurality of blocks of the image; and classifying the blocks for compression. At least some of the blocks are classified according to...
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6741747 |
Data compression
Data compression apparatus for compressing an input data unit to produce an output data unit in accordance with a desired data quantity of the output data unit, the degree of compression being...
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6741748 |
Scan interleaving method based on context values of neighboring pixels, improved encoding/decoding method of binary shape data and encoding/decoding apparatus suitable for the same
There are provided an improved scan interleaving method based on context values of neighboring pixels, an improved binary shape encoding/decoding method, and encoding/decoding apparatus suitable...
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6741368 |
Method and apparatus for reducing storage requirements for display data
A method and apparatus for generating a compressed representation of a two-dimensional image where the image is described as a sequence of pixels in raster order. The method includes receiving the...
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6738169 |
Image processing apparatus and method
In a high-frequency component processing section, a low-quality color transformation section applies a very simple (meaning a small amount of calculations) color transformation to an original image...
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6735341 |
Image processing device and method and recording medium for recording image processing program for same
An image processing device includes a first discriminator for discriminating halftone regions of an input image; and a device for smoothing only the discriminated halftone regions. An image...
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6731814 |
Method for compressing digital documents with control of image quality and compression rate
A method and apparatus for compressing and decompressing electronic documents, with maximum intradocument independence, and maximum flexibility in optimization of compression modes. The method...
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6731800 |
Method for compressing scanned, colored and gray-scaled documents
Scanned, colored and gray-scale documents are compressed. The digital image of the scanned document is divided into three image planes. These image planes are a foreground image, a background image...
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6731813 |
Self adapting frame intervals
A computer processor implemented video compression method and computer program product for automatically adjusting frame interval during compression of a video signal. The method determines a video...
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6731812 |
Data compression
Data (D) is compressed in dependence on a compression parameter (CPAR). An example of such data compression is coding a sequence of pictures in accordance with a standard defined by the Moving...
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6714682 |
Image processing device and method and memory medium
An object of the invention is to designate an image compressing system every tile. To achieve this object, an image input device is constructed by an image scanner, a film scanner, an electronic...
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6714684 |
Subband image compression of blocks within a bounded shape using a resolution transform
System consistent with this invention comprise a first coding part configured to code a map signal indicative of the position and shape of a content in a screen inputted for every square block of...
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6711296 |
Apparatus for performing loss-less compression-coding of adaptive evolution type on image data
An image coding apparatus including a context generator configured to select a reference pixel that has been coded in image data to generate a context formed of the selected reference pixel, an...
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6711295 |
Encoding apparatus and method, and storage medium
The primary objective of the present invention is the efficient performance of Golomb-Rice encoding. To achieve this objective, an encoding method comprises the steps of receiving image data for...
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6701020 |
JADE-JPEG based adaptive document compression engine
A method, system and program product for compressing a compound image, comprising forming compound image data into a plurality of blocks; obtaining classifying data that designate one from a...
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6701019 |
Determining visually noticeable differences between two images
The present invention relates to a method and apparatus for determining visually noticeable differences between two input images. A first contrast image is generated from the first input image and...
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6697530 |
Data compression through adaptive data size reduction
A computing-device implemented method for compressing data, where such devices include a computer, personal digital assistant (PDA), home appliance, and the like. The data includes bandwidth...
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6697529 |
Data compression method and recording medium with data compression program recorded therein
A data compression method includes: a quantization trial step in which input data are quantized using an initial quantization table set in advance; a coding trial step in which a code volume...
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6694060 |
Frame bit-size allocation for seamlessly spliced, variable-encoding-rate, compressed digital video signals
A controller allocates a bit size for a current frame in a group of pictures of a first compression-encoded digital video signal that is to be spliced following transmission of the group of...
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6690833 |
Apparatus and method for macroblock based rate control in a coding system
A method and apparatus for selecting a quantizer scale for each macroblock within a frame to optimize the coding rate is presented. A quantizer scale is selected for each macroblock within each...
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6687410 |
Method and apparatus for compression and decompression of data
The present invention is a compression scheme for compressing audio and video data. An image is divided into blocks of pixels. In one test, if all of the pixels are approximately equal to the...
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6683993 |
Encoding and decoding with super compression a via a priori generic objects
A method and apparatus for transferring a data signal includes a transmitter having an encoder and a receiver having a decoder. The encoder includes a segment selector for identifying a signal...
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6683990 |
Image data encoding apparatus
An image data encoding apparatus includes a wavelet transform unit which produces a first subband coefficient and a second subband coefficient as an output in response to each of blocks of the...
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6683987 |
Method and apparatus for altering the picture updating frequency of a compressed video data stream
A method and apparatus for altering the picture updating frequency within an MPEG compressed video data stream replaces the data of each of successive predictively encoded pictures of that data...
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6683989 |
Coding apparatus for recoding coded bit streams
A code amount of each block of primary-coded bit streams and a degree of complexity of image using quantization coefficients, i.e., a degree of difficulty in coding are calculated. Then, recoding...
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6674897 |
Picture data compression device and red data detection device
A picture data compressing device has picture data divided by a blocking circuit 1 in to a plurality of blocks, each block consisting of a pre-set number of pixels and shuffled by a shuffling...
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6674910 |
Apparatus and method for image-compression encoding and decoding using adaptive transform
An apparatus and method for image-compression encoding and decoding using an adaptive transform in which, where different transform coefficients are outputted in accordance with a change of the...
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