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6823082 |
Method of compressing digital images
A method of compressing digital representations of images stores the images in multiple subsampling quality scales in a progressive manner such that a higher quality scale contains only data...
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6819800 |
Moving image compression/decompression apparatus and method which use a wavelet transform technique
A moving image compression/decompression apparatus and method that uses, for example, a wavelet transform technique in order to improve a compression rate is disclosed. The moving image...
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6819801 |
System and method for processing demosaiced images to reduce color aliasing artifacts
A system and method is provided for processing a demosaiced image using a color aliasing artifact reduction (CAAR) algorithm in order to reduce color aliasing artifacts. The CAAR algorithm computes...
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6816619 |
Optimising image compositing
A method and apparatus for creating an image is disclosed. The image is formed by rendering at least a plurality of graphical objects to be composited according to a compositing expression. Each...
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6813388 |
Image coding method, image coding apparatus and data storage medium
A coding process is enabled in object units for an image signal having no shape information, without performing a process for extracting shape information of a specific area in a natural image from...
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6813384 |
Indexing wavelet compressed video for efficient data handling
A system of indexing discrete wavelet transform data, after entropy encoding, allows access to particular frames and sub-bands without decomposing all of the data to find the information of...
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6804405 |
Method and a system for coding rois
In a method and a system for encoding and transmission of still images having at least one region of interest (ROI), the ROI coefficients of an image transformed into the frequency domain,...
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6804403 |
Region-based scalable image coding
A region-based system, method and architecture for encoding and decoding digital still images to produce a scalable, content-based, randomly accessible compressed bit stream is disclosed. According...
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6804404 |
Shape information coder and decoder dividing shape information into lower-resolution subsets
A shape information coder divides the pixels in the shape information into subsets representing different subsamplings of the shape information. Each pixel in each subset is coded with reference to...
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6804402 |
Method and apparatus for hierarchically encoding and decoding an image
The method of encoding divides the image into a number of blocks, which are then transformed ( 200 ), in accordance with a linear transform, into blocks of transform coefficients. The transform...
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6801667 |
Method and apparatus for re-ordering of a bit stream
A method of selecting transform segments from a data stream ( 426 ), the stream comprising a plurality of blocks each comprising a plurality of transform segments, is disclosed. The selection...
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6801573 |
Method for dynamic 3D wavelet transform for video compression
A dynamic 3D wavelet transform system and method for compressing video including color or black and white signal. The method applies a so-called packed integer wavelet transform to individual video...
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6801666 |
Device and method for transforming a digital signal
A trellis filtering of a digital signal is disclosed. A method is provided of analysis filtering of an original digital signal including original samples representing physical quantities. Original...
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6798923 |
Apparatus and method for providing panoramic images
A method and system of merging a pair of images to form a seamless panoramic image including the following steps. A set of feature points are extracted along the edges of the images, each feature...
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6798917 |
Image input apparatus, image processing apparatus, image input method, image processing method and image input system
The invention provides an encoding method applicable to the sub band encoding of an image of any resolution or size. For example, by designating the resolution or size of an input digital image and...
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6798916 |
Decoding method and decoding apparatus
An image decoding method is provided for decoding each block of a digital image divided into a plurality of blocks, from a coded image signal including codewords of the block and codewords of...
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6795585 |
Representing digital images in a plurality of image processing states
A method for representing a digital image in a plurality of image processing states using at least one reference digital image and at least one residual image comprising the steps of manipulating...
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6795589 |
Optimizing image compositing
A method and apparatus for creating an image is disclosed. The image is formed by rendering at least a plurality of graphical objects to be composited according to a compositing expression. Each...
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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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6788740 |
System and method for encoding and decoding enhancement layer data using base layer quantization data
There is disclosed a video encoder comprising a base layer encoder and an enhancement layer encoder. The base layer encoder receives an input stream of video frames and generates compressed base...
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6788820 |
Methods and apparatus for wavelet-based image compression
A multi-stage wavelet transform of an image signal is implementing using a first processing element to perform computations for a first stage of the transform, and a second processing element...
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6785427 |
Image matching using resolution pyramids with geometric constraints
An image matching method for matching a first image and an overlapping second image includes generating a first set of working layers of the first image and a second set of working layers of the...
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6785411 |
Image analyzing apparatus and image analyzing method
There are provided an image analyzing apparatus and an image analyzing method where, in analyzing a microscopic image of a microbe or a cell tissue, the manpower-independent observation and...
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6782136 |
Method and apparatus for encoding and decoding subband decompositions of signals
An aspect of the present invention includes a method of encoding coefficients of a subband decomposition, to prepare the coefficients for compression. Another aspect of the present invention...
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6782130 |
Rendering of photorealistic computer graphics images
A method, apparatus, and system are provided for rendering of photorealistic computer graphics images. According to one embodiment, an image is partitioned into regions, each of the regions having...
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6778709 |
Embedded block coding with optimized truncation
A multi-layer embedded bitstream is generated from a subband decomposition by partitioning each subband of the decomposition into a plurality of blocks; and encoding the blocks of each subband. The...
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6775412 |
Lossless region of interest coding
In a method and a device for transmission of S+P transform coded digitized images a mask is calculated by means of which a region of interest (ROI) can be transmitted lossless whereby the ROI can...
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6774827 |
Code compression process, system and computer program product therefor
Binary words are converted between a non-encoded format and a compressed encoded format, in which the binary words are, at least in part, represented by encoded bit sequences that are shorter than...
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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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6771828 |
System and method for progessively transform coding digital data
The present invention is embodied in a system and method for compressing image data using a lapped biorthogonal transform (LBT). The present invention encodes data by generating coefficients using...
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6771820 |
Encoding information within text printed on a page using differing gray or color levels
A document processing system for imperceptibly encoding information in displayed images or text. Printed text or other images are modified using gray levels to encode information within existing...
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6771829 |
Method for local zerotree image coding
A transform-based image compression framework called local zerotree (LZT) coding partitions the transform coefficients into small groups, each of which is encoded independently using popular...
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6766062 |
Digital ridgelet transform via digital polar coordinate transform
A data processing technique called a Ridgelet transform is disclosed for more efficiently representing information. Original data samples (e.g., in the time domain) are received and transformed...
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6766286 |
Pyramid filter
Embodiments of a pyramid filter are described.
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6760482 |
Method for visual optimisation of embedded block codes to exploit visual masking phenomena
A method for lossy compression of images reduces visual distortion for a given compressed bit-rate or, equivalently, requires a lower bit-rate for a given level of visual distortion. An image is...
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6760481 |
Method and system for processing image data
The invention relates generally to the processing of image data. Especially the invention applies to the coding and decoding of still images for compression and transfer in a mobile...
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6757432 |
Apparatus for transmitting and/or receiving stream data and method for producing the same
A communication system is provided, which includes: a transmitter for transmitting multi-dimensional stream data capable of representing a CG scene; and a receiver for receiving the...
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6757434 |
Region-of-interest tracking method and device for wavelet-based video coding
A method and device for tracking a region-of-interest in a sequence of image frames, wherein the boundary of the target region of a previous frame is projected onto the current frame so that a...
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6757438 |
Method and apparatus for video compression using microwavelets
A method and apparatus are disclosed for symmetrically compressing and decompressing video information in real time by coupling block and wavelet techniques. In the compression pipeline, the image...
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6757437 |
Compression/decompression using reversible embedded wavelets
A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient...
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6757433 |
Object-based quad-tree mesh motion compensation method using greedy algorithm
An object-based quad-tree mesh motion compensation method using the Greedy algorithm is provided. This method defines an object-based quad-tree mesh structure defined by extending a hierarchical...
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6751355 |
Wavelet image compression using quantization based on frequency ranges and absolute values in wavelet image compression
Input data, distributed along a space axis, is converted into data distributed along a frequency axis by the use of a frequency range dividing filter, and is subjected to scalar quantization...
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6748118 |
Method of quantizing signal samples of an image during same
Briefly, in accordance with one embodiment of the invention, a method of quantizing signal samples of an image during image compression includes the following. A process to transform the signal...
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6738524 |
Halftone detection in the wavelet domain
A method of detecting halftones in the wavelet domain includes determining an energy value for the sub-bands in a wavelet decomposition. The calculated energy values are compared to a model of...
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6738523 |
Parallel inverse discrete wavelet transform
It is, therefore, an object of the present invention to provide a structure and method of processing signals, which includes transforming a signal into subbands by applying a forward discrete...
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6735342 |
Video encoding method using a wavelet transform
The invention relates to an encoding method for the compression of a video sequence divided in flames decomposed by means of a wavelet transform. Said method, based on the hierarchical subband...
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6731815 |
Human vision based pre-processing for MPEG video compression
Human vision based pre-processing for MPEG video compression uses light intensity. An input video signal is input to a contrast gain control circuit where a Gaussian pyramid is constructed. The...
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6728409 |
Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon
An apparatus for embedding information in a signal includes a band dividing device, a block divider, a quantization portion, a signal replacement portion, a mean difference addition portion, a mean...
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6728316 |
Video coding method
The invention relates to a video coding method applied to a sequence of frames and based on a tridimensional (3D) wavelet decomposition with motion estimation and compensation on couples of frames....
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6718065 |
Optimized signal quantification
A method for optimizing signal quantification comprising applying reversible filters to the signal in order to pre-quantify the signal as a continuous function of the frequency domain;...
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