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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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6671412 |
Motion image coding apparatus for performing hierarchical coding
An image coding apparatus inputs pixel data of a part image of high resolution. An upper layer coding portion ( 101 ), a second shape data generating portion ( 102 ), and a second shape data coding...
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6671415 |
Method and apparatus for quantizing and dequantizing data
A method and apparatus for quantising data in a data compression system ( 1 ) involves receiving original data ( 2 ) in the form of a plurality of discrete data values. A plurality of quantisation...
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6671411 |
Image encoding apparatus, method and memory medium therefor
The invention provides an image encoding apparatus/method capable of inputting image data, quantizing the image data, variable length encoding the quantized image data, detecting the code length of...
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6671410 |
Image processing apparatus that can have picture quality improved in reproduced original image data
An image processing apparatus includes a sort unit for sorting original image data into edge image data and planar image data, a first coding unit for coding the sorted planar image data according...
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6668088 |
Digital signal compression encoding with improved quantisation
In compression encoding of a digital signal, such as MPEG2, transform coefficients are quantised with the lower bound of each interval being controlled by a parameter λ. In the MPEG2 reference...
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6668086 |
Tile-based image data decoding method and apparatus
Disclosed are a method and apparatus for decoding encoded image data that has been obtained by dividing image data into a plurality of tiles and encoding the image data on a tile-by-tile basis....
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6668089 |
Process for controlling the compression ratio of digital images
The present invention relates to a process for controlling the compression ratio of digital images. This process consists of compressing a digitized image by means of a conventional process such...
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6665340 |
Moving picture encoding/decoding system, moving picture encoding/decoding apparatus, moving picture encoding/decoding method, and recording medium
A moving picture encoding/decoding system includes a moving picture encoding apparatus and moving picture decoding apparatus. The moving picture encoding apparatus has an input image encoding unit,...
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6664902 |
Storing coding image data in storage of fixed memory size
An apparatus includes a DCT unit for transforming blocks of pixels into respective blocks of transform coefficients, entropy encoders for encoding respective partitions of the DCT blocks where at...
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6661925 |
Functional set compression
A method of compressing image data from a set of individual images wherein the images have a correlation between images of approximately greater than 0.5. A wavelet transform is applied to a...
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6661926 |
Picture compression process, especially of the MPEG2 type
A picture compression process, especially of the MPEG2 type, in which each picture macroblock (10) is subjected to a coding chosen, for each macroblock, from among several types of coding. In order...
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6661933 |
Apparatus and method for image data processing
When an image is to be filed in the storage means 105 , an original copy size detection means 102 b identifies the type (size and lay) of the original copy. A first positioning means 11 a puts...
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6661924 |
Method and apparatus for compressing and expanding image data
An image compression apparatus transforms original image data partitioned into first blocks, each of which is composed of a plurality of pixels, to reduced-image data composed of a smaller number...
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6658156 |
Information processing apparatus and method
Compression processing where block compression is prioritized has various problems, for instance, data compressed by a method other than block compression is compressed at low compression rate,...
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6658161 |
Signal-processing method and device therefore
A signal-processing method for performing a coordinate transformation operation and a quantization operation on an input data to obtain quantization outputs, and a signal-processing device...
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6658157 |
Method and apparatus for converting image information
A technique is disclosed for reducing the bit rate of a bit stream coded into a compressed form according to the MPEG-2 standard, without causing significant degradation in image quality of a...
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6654416 |
Device and process for regulating bit rate in system for the statistical multiplexing of image streams coded according to MPEG2 coding
A device for regulating bit rate in a system for statistically multiplexing several streams of MPEG 2 coded images is disclosed. The statistical multiplexing system includes a device ( 1 ) for...
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6650782 |
Visually progressive ordering of compressed subband bit-planes and rate-control based on this ordering
A method for encoding a digital image in a visually progressive manner comprises decomposing the digital image into two or more subbands; quantizing the subbands of the decomposed digital image to...
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6650783 |
Image processing apparatus and method for processing images with different scalabilites
A single base layer is formed by reducing information of input image data with at least a plurality of scalable factors, and a plurality of enhancement layers having information associated with a...
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6643405 |
Image processing apparatus and method and computer-readable storage medium
It is an object to obtain compressed image data in which a compression ratio has been recorded. To accomplish it, an image processing method has a first compressing step of compressing by using an...
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6640013 |
Image decoding using a shape map
Methods and systems consistent with this invention decode image data. Such methods and systems decode a coded map signal indicative of the position and shape of a content in a screen inputted for...
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6640012 |
Image compression system and method of determining quantization parameters therefor
An image compression system ( 1 ) having a wavelet transform module ( 3 ) for decomposing an input image subdivided into blocks using a wavelet transformation utilizes a statistics generator ( 7 )...
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6636642 |
Image coding device, image decoding device, image coding/decoding device and image coding/decoding method
To realize image coding/decoding device that can compress an input multivalued image with high compression efficiency, the following measures are taken. First and second predictors predict the...
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6636637 |
Method and arrangement for coding and decoding a digitized image
The method and apparatus have a shape-adapted transformation coding is in which in the intra-image coding and the inter-image coding different shape-adapted transformation codings are carried out....
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6633680 |
System, method and computer program product for small-font compression
A system, method and computer program product are provided for the compression of characters with a predetermined size. Initially, a plurality of characters are received. Thereafter, the characters...
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6633677 |
Method and apparatus for processing an image in an image compression/decompression system that uses hierachical coding
A component of an image processor receives at least a portion of one or more reconstructed versions of an image including a causal context of an object pixel of the image, and provides a prediction...
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6628708 |
Method and system for compressing color video data within a data processing system
A method for compressing color video data within a data processing system is disclosed. A pixel, which includes multiple bits that forms a color value, is initially received. A determination is...
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6625321 |
Embedded image coder with rate-distortion optimization
A rate-distortion optimized embedding (RDE) coder optimizes rate-distortion performance by coding information bits in the order of their R-D slope. RDE allocates the available coding bits first to...
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6625214 |
Apparatus and method for fade detecting and information encoding
An fade detection device detects fade transitions in a image data signal used for image data compression provided with: an inter-frame difference calculation device calculates the absolute value of...
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6625323 |
Method for compressing and decompressing digital having text
A method for compressing a digital image having both saturated text and/or line art and pictorial imagery, the method comprises the steps of: receiving the digital image as blocks of pixels;...
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6614938 |
Image compression with orthogonal transform of blocks within a bounded shape
An image coding system that codes a map signal indicative of the position and shape of a content in a screen inputted for every block of picture signals to be coded; performs the orthogonal...
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6614941 |
Image activity in video compression
Video data compression apparatus comprises means for detecting image activity values indicative of image activity for regions of an input image to be compressed; means for filtering the detected...
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6611626 |
Method of compressing JPEG files using a conditional transform
A method for compressing digital image data to improve the efficiency of serial data transmission is disclosed. More specifically, the present invention accomplishes image compression by performing...
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6606415 |
Feedback control for hybrid compression
A closed loop feedback system adaptively controls the compression ratio in a Raster Image Processor. The image content is analyzed in real time, and rasterized bitmap is compressed to a sufficient...
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6603813 |
Video signal coding systems and processes using adaptive quantization
A compression system and process employs a group of quantizers (or set of predefined quantized values) and involves the selection of the quantizers for each video frame or frame portion. For each...
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6600837 |
Image compression controller and image pickup system using the same
An image compression controller capable of simplifying the quantization coefficient control in an image compression process and attaining a high speed In image compression, including a first...
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6597814 |
Image coding for transmitting information of shape, pixel value, and coding modes
It is an object to encode an image signal or a shape signal more efficiently than the prior art. As a means to accomplish the object, the change pixel detector 2 receives the input signal 1 as...
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6594394 |
Fast compression and transmission of seismic data
Apparatus and method for performing fast compression and decompression of seismic data. An adaptive transform ( 124 ) with selectable mathematical basis is applied to an initial data set to obtain...
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6594397 |
Adaptive multi-modal motion estimation for video compression
An adaptive multi-modal motion estimation algorithm for video compression builds a luminance pyramid for each image of a moving image sequence. From the top level image of the luminance pyramid a...
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6587583 |
Compression/decompression algorithm for image documents having text, graphical and color content
A computer program product for compressing data files representative of an image document. The document includes color information and/or graphical information. The product is on a computer...
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6584226 |
Method and apparatus for implementing motion estimation in video compression
Methods and apparatus for processing video data that is divided into frames are presented. In one aspect, this relates to a method for processing video data that is divided into frames. The video...
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6577768 |
Coding method, code converting method, code converting apparatus, and image forming apparatus
This invention relates to a coding method, code converting method and apparatus, and image forming apparatus and, more particularly, to a coding method, code converting method and apparatus, and...
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6570926 |
Active techniques for video transmission and playback
Encoding a real-time and non-real-time video stream, encapsulating the encoded video stream along with the decoding software corresponding to the encoding program into active packets at the...
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6567559 |
Hybrid image compression with compression ratio control
A block based hybrid compression method with compression ratio control. The input page is classified as SOLID, TEXT, SATURATED TEXT or IMAGE type, and the compression method most appropriate for...
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6563955 |
Method and apparatus for analyzing image data to use multiple transforms for enhanced image data transmission
A method and apparatus for compressing digital image data to improve the efficiency of serial data transmission is disclosed. More specifically, the present invention accomplishes image...
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6564282 |
Method and system for increasing storage capacity in a digital image capture device
Method and system aspects for increasing storage capacity in a digital image capture device are described. Compression levels of saved image files are utilized to increase storage capacity by...
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6560368 |
Arithmetic coding and decoding methods and related systems
Arithmetic coding and decoding, and compressing and decompressing methods and systems are described. In one embodiment, occurrence values are calculated that represent the number of times...
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6560369 |
Conversion of wavelet coded formats depending on input and output buffer capacities
An optimum data arrangement is provided such that each apparatus can efficiently deal with image data encoded using discrete wavelet transform. For that purpose, an image processing apparatus...
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