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Class 382/248 - Transform coding


Subclass of Class 382 - Image analysis
Definition: Subject matter in which the image data undergoes a mathematical
No. of patents: 858
Last issue date: 05/07/2013


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NumberTitleIssue Date
8437564Image and video compression using sparse orthonormal transforms
A method and apparatus is disclosed herein for performing compression with sparse orthonormal transforms. One method includes receiving a block of data; classifying the block of data based on directional structure; selecting one of a plurality of available direction...
05/07/2013
8433150Sample based tone mapping method for high dynamic range images
The disclosure relates to adjusting intensities of images. The method includes receiving information identifying of a plurality of regions within an image; receiving an intensity adjustment of at least one of the plurality of regions; adjusting the intensities of th...
04/30/2013
8369638Reducing DC leakage in HD photo transform
In certain embodiments, to eliminate DC leakage into surrounding AC values, scaling stage within a photo overlap transform operator is modified such that the off-diagonal elements of the associated scaling matrix have the values of 0. In certain embodiments, the on-...
02/05/2013
8358864Image processing apparatus and image processing method
An image processing apparatus includes a receiving unit configured to receive image data of program content and genre information relating to the program content, a selection unit configured to select a size selection parameter for causing the genre information rece...
01/22/2013
8351723Methods and apparatus for generating and using visual error weights
A low complexity visual masking method used as part of an image encoding process is described. The method is suitable for use in JPEG2000 image compression systems. Control weights used for rate allocation are generated based on integer order moments of wavelet tran...
01/08/2013
8346000Systems, methods, devices and arrangements for motion-compensated image processing and coding
A variety of methods, devices, systems and arrangements are implemented for processing and coding of video images. According to one such implementation, a method is implemented for encoding a sequence of images. A plurality of orthogonal transforms is implemented on...
01/01/2013
8331708Method and apparatus for a multidimensional discrete multiwavelet transform
Methods and apparatuses for compressing and decompressing digital data. The method for compressing digital data comprises a number of steps: a) generating a vector-valued dataset according to the digital data, b) transforming the vector-valued dataset into multiwave...
12/11/2012
8300966Image signal encoding method and decoding method, information source encoding method and decoding method, apparatuses therefor, programs therefor, and storage media which store the programs to process gaussian integer signal
An information source encoding method for encoding a Gaussian integer signal includes the steps of: inputting a signal value sequence of a Gaussian integer signal as an encoding target; transforming signal values included in the input signal value sequence into inte...
10/30/2012
8260072Image encoding apparatus and method of controlling the same
This invention provides a technique of easily encoding image data to generate encoded data having high image quality within a target code amount using a small memory capacity by image encoding processing of performing frequency transform and quantization of each pix...
09/04/2012
8229239Image processor
An image processor includes a quantization unit receiving first data before quantization and outputting second data after quantization, a prediction unit obtaining a difference value between the second data and third data being prediction data and outputting the dif...
07/24/2012
8224105Method for coding image, image coding device and image pickup system
It is decided whether a processing target block includes an edge in accordance with an edge detection result of the processing target block. In the case where the edge is included, it is then detected whether there is a flat portion. It is decided whether the proces...
07/17/2012
8175404Method and device for estimating image quality of compressed images and/or video sequences
A method for estimating quality of images compressed with a transformation based compression method. The estimation method uses estimated errors generated by quantization to obtain an image quality indicator and does not require use of a reference image. The estimat...
05/08/2012
8111934Extension of two-dimensional variable length coding for image compression
A method and an apparatus to encode a series of quantized coefficients of a transform of a block of image data. The transform is such that 0 is the most likely coefficient amplitude and 1 is the next most likely coefficient amplitude. The method includes forming sym...
02/07/2012
8094955Image reducing apparatus and reduced image generating method
In a case where a padded orthogonally transformed block obtained by orthogonally transforming a padded image block of 8×8 pixels to which padding data has been added has been recorded as compressed image data, the padded orthogonally transformed block is subjected ...
01/10/2012
8086056Encoding device and method, decoding device and method, and program
Described herein are methods and devices for encoding and decoding data. An encoding device can be configured to encode video by performing intra-frame encoding using wavelet transformation. The encoding device can include a generation unit configured to generate a ...
12/27/2011
8081830Enhancement of digital images
Processing of at least one digital image includes performing first and second separable block transforms in first and second directions; modifying results of the second block transforms; and performing first and second separable inverse block transforms in the first...
12/20/2011
8059902Spatial sparsity induced temporal prediction for video compression
A method and apparatus are disclosed herein for spatial sparsity induced temporal prediction. In one embodiment, the method comprises: performing motion compensation to generate a first motion compensated prediction using a first block from a previously coded frame;...
11/15/2011
8045815Image encoding apparatus and image encoding method
An image capturing apparatus 100 first executes JPEG encoding on RAW data. On the basis of the compression ratio of JPEG image data obtained, the image capturing apparatus 100 selects a Huffman table to encode the RAW data. With the higher compression ...
10/25/2011
8041135Image encoding apparatus and control method thereof
An apparatus and method encodes into block units an image in which halftone images and character and/or line images are mixed, and makes a substitution value, substituting for pixels in which pixels of a character and/or line image exist, a value whereby the occurre...
10/18/2011
8036478Color image residue transformation and/or inverse transformation method and apparatus, and color image encoding and/or decoding method and apparatus using the same
A color image residue transform and/or inverse transform method and apparatus, and a color image encoding and/or decoding method and apparatus using the same are provided. The residue transform method includes: obtaining a residue corresponding to the difference of ...
10/11/2011
8031960Wavelet transformation device and method, wavelet inverse transformation device and method, program, and recording medium
Wavelet transformation is performed at a plurality of levels as to image signals. A first buffer stores, independently for each of the levels, a part of coefficients from results of analysis filtering in a horizontal direction of the image signals. A second buffer s...
10/04/2011
8027547Method and computer program product for compressing and decompressing imagery data
Techniques are provided for compressing and decompressing image data which may reduce the distortion that may otherwise be created by the compression of data values representative of null posts, overlays or other features that differ from the underlying image. In co...
09/27/2011
8000548Wavelet transformation device and method, wavelet inverse transformation device and method, program, and recording medium for performing wavelet transformation at a plurality of division levels
A wavelet transformation device for performing wavelet transformation at a plurality of division levels as to image signals. A horizontal filtering unit subjects the image signals to horizontal direction lowband analysis filtering and highband analysis filtering. Bu...
08/16/2011
7995849Method and apparatus for improving video quality of low bit-rate video
Embodiments describe a method, apparatus and system for processing images using block based compression. In one embodiment, a method comprises determining whether two blocks are neighboring blocks, determining whether the two neighboring blocks are both subdivided, ...
08/09/2011
7925107Adaptive variable block transform system, medium, and method
A variable block transform system, medium, and a system, medium, and method for video encoding/decoding using the variable block transform. The system includes a transform block size determination unit that determines the transform block size for components of an in...
04/12/2011
7925108Encoding device and dynamic image recording system having the encoding device
To always maintain good image quality no matter whether the target bit rate for encoding is high or low. An encoder 210 includes: a converting section 103 for converting picture data representing a moving picture into a coefficient including a p...
04/12/2011
7903895Data transformation device for image processing
A data transformation device including a pre-processing unit, a calculating unit and a post-processing unit is disclosed. The pre-processing unit performs a first pre-process with received image data to generate pre-processed image data, and performs a second pre-pr...
03/08/2011
7899263Method and apparatus for processing analytical-form compression noise in images with known statistics
Embodiments of the invention provide methods to calculate compression noise statistics of decompressed images in transform coding. They can be used in compressed image quality assessment, compression algorithm optimization, compression noise reduction, and other qua...
03/01/2011
7873227Device and method for processing at least two input values
For the reduction of the rounding error, a first and a second non-integer input value are provided and combined, for example by addition, in non-integer state to obtain a non-integer result value which is rounded and added to a third input value. Thus, the rounding ...
01/18/2011
7853093System, medium, and method encoding/decoding a color image using inter-color-component prediction
A color image encoding and/or decoding system, medium, and method using inter-color-component prediction in a frequency domain. To encode an original image, including at least two or more image components, frequency domain transform may be performed with of each com...
12/14/2010
7809205Image processing method, image processing apparatus, image forming apparatus and recording medium
An image processing apparatus in which image data is transformed to spatial frequencies to obtain multiple frequency components, the obtained frequency components are processed, the processed frequency components are inversely transformed to image data, and the numb...
10/05/2010
7756350Lossless encoding and decoding of digital data
The disclosure relates to encoding and decoding of digital data, and in particular to lossless arithmetic encoding and decoding of digital data representing audio, image or video data. A probability density function used for lossless arithmetic encoding of digital d...
07/13/2010
7747097Method for simple hardware implementation of JPEG size limiter
A size limiter module used to limit a file size of an encoded file is disclosed. The size limiter module includes a size limiter set-up calculator and a size limiter processing engine. The size limiter calculator is configured to identify a maximum bit size for a se...
06/29/2010
7742649Method and system for image compression using image symmetry
An image compression system and method is described, which makes use of the symmetry found in faces and heads to perform the compression. The image is divided along the line of symmetry, and pairs of corresponding pixels on the two divided sides are determined. A we...
06/22/2010
7724975Design techniques and their circuit designs for versatile and scalable video coding
Design techniques and their circuit designs for versatile and scalable video coding are proposed, in which the inner product operation in the transform coding expression is taken apart into a series of add and shift operations, and the expression is partitioned into...
05/25/2010
7724976Reduced error processing of transformed digital data
This invention solves problems due to employing error degraded data in digital processing. It particularly solves multi-generation problems wherein transform data degrade during each inverse transform and forward transform cycle even without any processing due to th...
05/25/2010
7720298Method for processing a digital image and image representation format
An image representation format for representing a digital image comprises: image information stored as a bitstream representing sequential image blocks, each block comprising one or more components, each component comprising one or more data units and each data unit...
05/18/2010
7689052Multimedia signal processing using fixed-point approximations of linear transforms
Close approximations of ideal linear transforms, such as the forward and inverse discrete cosine transformation (DCT), are formed with minimum complexity using fixed-point arithmetic. The transformation is decomposed into a smaller set of transformations (e.g., the ...
03/30/2010
7680350Method and system for progressive mesh storage and reconstruction using wavelet-encoded height fields
Systems and methods are provided for progressive mesh storage and reconstruction using wavelet-encoded height fields. A method for progressive mesh storage includes reading raster height field data, and processing the raster height field data with a discrete wavelet...
03/16/2010
7634148Image signal transforming and inverse-transforming method and computer program product with pre-encoding filtering features
An aspect of an image signal transforming method is a method of generating one or more transformed samples from a plurality of input samples, which includes a first transformed sample generating step of performing a first filtering process by a filter, on at least o...
12/15/2009
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