Matches 51 - 100 out of 186 < 1 2 3 4 >
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6970268 Color image processing method and apparatus thereof  
A color image processing method and apparatus thereof are provided. The color image processing method includes the steps of (a) sorting image pixels according to the color distance between the...
6968092 System and method for reduced codebook vector quantization  
The present invention extends the generalized Lloyd algorithm (GLA) for vector quantizer (VQ) codebook improvement and codebook design to a new linearly-constrained generalized Lloyd algorithm...
6947944 Database managing apparatus and database record retrieving apparatus  
A database managing apparatus, which can immediately obtain desired data from a database. A database managing apparatus includes a CPU, an input/output device, a main memory and an external memory....
6944347 Image compression and restoring method for binary images  
The present invention relates to the image compression and restoring method for binary images that can be used in binary image equipment including printers. In the present invention, an image is...
6944350 Method for image coding by rate-distortion adaptive zerotree-based residual vector quantization and system for effecting same  
Methods and systems for encoding, transmitting and decoding digital images by rate-distortion adaptive zerotree-based residual vector quantization are disclosed. A method of the invention includes...
6931067 Apparatus and method for image coding using tree-structured quantization based on wavelet transform  
An apparatus for image coding using tree-structured vector quantization based on a wavelet transform and a method therefor are provided. The apparatus for image coding using a tree-structured...
6915024 Image sharpening by variable contrast mapping  
Image sharpening is performed by applying variable contrast stretching to pixels of interest in a digital image. For each pixel of interest, the amount of contrast stretching is a function of...
6915020 Generating graphical bar codes by halftoning with embedded graphical encoding  
Systems and methods for generating graphical bar codes (i.e., images that contain inconspicuous graphical modulations that encode embedded information) by halftoning with embedded graphical...
6915019 Method for combining vector-quantization decoding with color transform or halftoning or both  
A method of decompressing image data, includes reception of a VQ encoded image. The received image is decoded. Output image color space processing is performed in combination with the decoding as...
6907527 Cryptography-based low distortion robust data authentication system and method therefor  
A method (and system) for generating an output file from a source file where benign modifications to a content of the output file still render the output file authentic, includes constructing an...
6898326 Image processing apparatus and method  
A transformation unit 102 transforms an entered image to multi-resolution space. A quantizer 105 performs vector quantization on a local pattern of an image of a multi-resolution...
6888967 Data coding method and apparatus therefor  
A picture target amount-of-code calculating unit calculates a target amount of codes for each picture type that corresponds to an encoding rate that has been determined by an audio/video encoding...
6865291 Method apparatus and system for compressing data that wavelet decomposes by color plane and then divides by magnitude range non-dc terms between a scalar quantizer and a vector quantizer  
An apparatus and method for image data compression performs a modified zero-tree coding on a range of image bit plane values from the largest to a defined smaller value, and a vector quantizer...
6864997 Picture encoding apparatus and method  
A picture encoding apparatus and the method in which the quantization step width of the lower hierarchy data having a resolution higher than that of the upper hierarchy data is determined for each...
6859204 Dynamic threshold system for multiple raster content (MRC) representation of documents  
A method and a system for dynamically thresholding an image signal. The system comprises a computing block. The computing block receives the image signal and a minimum and a maximum within each of...
6807312 Robust codebooks for vector quantization  
A method for data compression. An encoder receives data vectors from an original data set. The encoder uses a vector quantization codebook to encode the data vectors into encoded vectors. The...
6798543 Method and apparatus for compression and decompression of halftoned images  
A method for compression and decompression of halftoned images using the halftone screen. The method reduces an input binary image into a mean image, uses the halftone screen in combination with...
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...
6744928 Variable-length decoding method and apparatus employing code length and a recording medium  
The present invention includes methods and apparatus for attaining high speed coding and decoding. A first method decreases the number of memory access times by performing signal format conversion,...
6731810 Method and apparatus for coding moving image and medium for recording program of coding moving image  
A method and an apparatus for coding a moving image, capable of obtaining high image quality and high rate of data compression, are provided. The method compares a pixel block of current image to...
6728413 Lattice vector quantization in image compression and decompression  
The invention proposes a method of determining an index of a code vector (VC k ) belonging to a predetermined lattice, characterised in that it includes the steps of: determining (E 47 ) a leader...
6724940 System and method for encoding multidimensional data using hierarchical self-organizing cluster vector quantization  
The present invention relates to a method of encoding a hyper-spectral image datacube using vector quantization. According to the invention, a temporary codebook having a small number, n, of...
6701022 Pattern matching coding device and method thereof  
A pattern matching coding device for conducting coding of a unit pattern based on pattern matching with a library pattern, which device, as to a mark pattern determined to be matching, when the...
6701021 System and method for encoding/decoding multidimensional data using successive approximation multi-stage vector quantization  
The present method relates to a method for encoding image data using vector quantization. According to the invention, a small first codebook is determined. Each image vector of the image data is...
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...
6694059 Robustness enhancement and evaluation of image information extraction  
A method for recognition of features appearing in an input image includes upsampling the input image to generate an enlarged image including an increased number of pixels relative to the input...
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...
6683994 HVQ-based filtering method  
A method for filtering digital data using techniques normally utilized for data compression prior to transmission or storage. These techniques include codebooks and codewords as found with vector...
6671416 Method for transmitting data using an embedded bit stream produced in a hierarchical table-lookup vector quantizer  
A transmission method for video image data using an embedded bit stream in a hierarchical table-lookup vector quantizer comprises the steps encoding an image using hierarchical vector quantization...
6647143 Method and device of compressing digital image data  
A method and device of compressing a digital image are provided. The method firstly divide pixels in the image into entries, then representative color information of the entries are determined and...
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;...
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...
6584230 Image decoding of image content within a boundary based on a map resolution transformed signal  
Methods and systems decode an image content. Such methods and systems decode a coded map signal indicative of the position and shape of a content in a screen inputted for every block of picture...
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...
6546146 System for interactive visualization and analysis of imaging spectrometry datasets over a wide-area network  
The present invention relates to a method of viewing and processing hyper-spectral image data compressed using a VQ algorithm. According to the invention the data is compressed using a codebook of...
6542631 Encoding method of a color image and its encoding device and a decoding method of the color image and its decoding device  
The invention improves the refresh rate and minimizes the memory for display when reproducing a color image. A color image encoding device has a creation device which counts the number of colors...
6539122 Adaptive wavelet coding of hyperspectral imagery  
A hyperspectral image encoder ( 10 ) for compressing hyperspectral imagery includes a differential pulse code modulation (DPCM) loop ( 26 ) to perform data decorrelation in the spectral domain and...
6535640 Signal analysis system and method for determining a closest vector from a vector collection to an input signal  
A signal analysis system/method, for identifying the closest vector in a vector collection to a given input signal vector, comprising an input, a memory, and a processing unit. The memory stores a...
6535646 Discrete cosine transform method and apparatus  
A linear transform apparatus for implementing a linear transform on input data values to produce linear transformed output data, the apparatus comprising: input means for inputting input data...
6535644 Hierarchical foveation based on wavelets  
Different images, or sub-images, are rendered at different wavelet decoding rates, the more rapidly decoded wavelets forming a focal region about which less detailed images, or sub-images, are...
6535647 Image encoder method  
A system is presented for compression of hyperspectral imagery. Specifically, DPCM is used for spectral decorrelation, while an adaptive 2-D discrete cosine transform (DCT) ( 22 ) coding scheme is...
6529635 Shape-based image compression/decompression using pattern matching  
A method and apparatus for compressing a digitized image. Boundaries of regions within a digitized image are identified. Shapes are selected from a bank of shapes based on the identified boundaries...
6516297 Multiple description lattice vector quantization  
Data is transmitted using multiple description vector quantization by first quantizing the source vector at a lattice vector quantizer. After quantization, a labeling function is applied to the...
6504494 Software, method and apparatus for rate controlled image compression  
Method, software, and apparatus ( 100, 300, 400 ) for performing rate controlled image compression are provided. A quantization matrix scaling factor that results in compression to a predetermined...
6466692 Method and apparatus for processing visual information  
A 2D image supplied from an image input unit including a wide view lens is sampled into a discrete form by an array sensor, and then mapped to a multi-resolution space by a 2D filter. The feature...
6438268 Vector quantization codebook generation method  
A data compression system using vector quantization utilises a codebook or index tables constructed by finding a small set of points in an n-dimensional space which are representative of a much...
6415061 Method of updating dictionaries in a data transmission system using data compression  
Method of updating dictionaries in a data transmission system wherein strings of characters have to be transmitted in a compressed form from the transmit device to the receive device, the transmit...
6404923 Table-based low-level image classification and compression system  
A system for classifying image elements comprising means for converting an image into a series of vectors and a hierarchical lookup table that classifies the vectors. The lookup table implements a...
6385242 Method and apparatus for inverse quantization of MPEG-4 video  
Inverse quantization ( 36, 44, 60 ) of a two-dimensional array of video coefficients QF[v][u] is provided. A first weighting matrix {overscore (W)}[0][v][u]=2*W[0][v][u] for intra-coded macroblocks...
6377706 Compression framework incorporating decoding commands  
An encoding and/or decoding method and apparatus incorporates decoding commands into a compressed file. The decoding commands are instructions carried along to a decompressor and implement...
Matches 51 - 100 out of 186 < 1 2 3 4 >