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5991453 |
Method of coding/decoding image information
A method of coding/decoding image information is derived to perform a boundary block merge of the macro blocks of the image information and copy the DCT coefficients of a block that is converted to...
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5987183 |
Image activity data compression and decompression method and apparatus
Image data compression apparatus for generating groups of encoded image data representing respective sub-areas of an image, in which the degree of data compression applied to each sub-area is...
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5987179 |
Method and apparatus for encoding high-fidelity still images in MPEG bitstreams
A frame in an uncompressed digital video signal is selected for encoding as a high-fidelity still image. The digital video signal is MPEG encoded to produce an MPEG encoded bitstream and additional...
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5987182 |
Markov model image encoding device and method
A plurality of reference pixel extracting means check their corresponding reference pixel ranges and pixel values in predetermined auxiliary regions. Reference pixel range selecting means selects a...
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5987181 |
Coding and decoding apparatus which transmits and receives tool information for constructing decoding scheme
A coding and decoding apparatus is constructed so that the coding side transmits coded data together with identifying information for identifying the device of decoding the coded data, and the...
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5982508 |
Image processing method and apparatus
In processing an image represented by binary data and an image represented by multivalue data, multivalue picture information is converted into a binary pattern corresponding to a value of the...
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5982937 |
Apparatus and method for hybrid compression of raster data
From a raster page, patches of connected pixels of the same color are identified. Patches of at least a predetermined sized, typically corresponding to text or line art objects, are subjected to a...
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5978517 |
Digital image progressive transmission
In order to progressively transmit a digital image (IM), a method for coding the image comprises the division (E1) of the image into vectors (V m ,n), the selection (E2) of a code vector (VC d )...
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5978514 |
Image data coding and decoding system for efficiently compressing information using the shape and position of the image content
An image data coding system comprises a screen-area determining means for determining the area of a screen reproduced on the basis of an input image data; a code-amount assigning control means for...
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5974185 |
Methods and apparatus for encoding video data using motion vectors for decoding by regular or downconverting decoders
Plurality of encoding methods and apparatus for encoding video data in a manner that makes it well suited for decoding by either regular or downconverting decoders are described. In one embodiment,...
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5970173 |
Image compression and affine transformation for image motion compensation
A transformation method provides a multi-dimensional affine transformation for representing motion between corresponding image components of successive video image frames. The multi-dimensional...
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5969766 |
Method and apparatus for contour motion estimating a binary image by using a weighted block match algorithm
A motion estimating method, for use in a motion estimation between a current and a previous frames of a binary video image, wherein the current frame is divided into a plurality of equal sized...
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5970176 |
Image communication apparatus
An image communication system which communicates image data on a single line includes a selector, a generator and a communication unit. The selector selects one of a first communication mode and a...
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5969764 |
Adaptive video coding method
A method adaptively encodes a sequence of frames including video objects to provide a compressed video signal. The encoding is via a buffer having a ariable input rate and a constant output rate....
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5966468 |
Image processing apparatus and method therefor
In an image processing system, a color or monochrome image region in an image is discriminated, and communication charges are displayed, as required when regions of the image are encoded by...
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5963673 |
Method and apparatus for adaptively selecting a coding mode for video encoding
A method and apparatus for adaptively selecting a coding mode for video encoding systems using the techniques of predictive coding, interpolative coding, motion compensation, discrete cosine...
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5963674 |
Image data encoding apparatus
An image data encoding apparatus encodes image data at a high speed while minimizing the deterioration of the image quality on a reproduced screen. The apparatus includes an encoding circuit, a...
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5960116 |
Image processing apparatus and method for performing prediction data encoding
A prediction error is effectively encoded in case of prediction encoding data by an information processor. A predictor predicts an objective pixel value, and a prediction error generation unit...
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5960117 |
Method of adaptive arithmetic encoding/decoding according to JBIG standard
To reduce computational time of adaptive arithmetic encoding/decoding according to JBIG standard, a step (S21) of reading the learning table and a step (S22) of reading the prediction probability...
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5956430 |
Image information coding apparatus and method using code amount of a selected pixel block for changing coding parameter
An image information coding apparatus includes a block generator for dividing image information into pixel blocks, each of which consists of a predetermined number of pixels. A block selector...
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5956153 |
Coding method and apparatus
Image coding method and apparatus for improving image quality by controlling amount of encoded image data in variable-length coding. The image encoding apparatus comprising: input unit for...
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5956426 |
Multi-coding apparatus
It is intended to determine widths of quantization of respective encoders to prevent deterioration in quality of picture in its entire aspect. A multi-coding apparatus comprises a plurality of...
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5953460 |
Image encoding method and an image encoder wherein a one-dimensional signal having the fastest energy conversion rate is selected and outputted as a coded signal
An image signal is transformed by at least two different mathematical transformations to obtain at least two different transformed signals. A selected one of the transformed signals is quantized...
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5953456 |
Recording apparatus for repetitively recording image data of same frame and reproducing apparatus
Image data of one frame stored in a memory is repetitively read a plurality of times as a still image. The read image data is encoded and recorded. In this case, the image data of one frame is...
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5940585 |
Data merge unit
A print data processing pipeline for use in a color electrophotographic printer optimizes print quality and minimizes memory usage by separately processing lossy and lossless print data. Lossy...
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5937099 |
Color image transmission with separate processing of binary and multi-level data
A color image transmitting method for transmitting a color image composed of a color image portion and a binary image portion is disclosed. Data about the color image portion and data about the...
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5937098 |
Adaptive quantization of orthogonal transform coefficients for setting a target amount of compression
An image signal compressing device having a spatial frequency data amount setting unit and a quantization table generation unit. A set data amount is set in the spatial frequency data amount...
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5937100 |
Two-pass image processing method and apparatus using virtual estimation for compressed file size
An image processing method and an image processing apparatus in which a DCT section transforms image data to a frequency conversion coefficient using a discrete cosine transform coefficient, a...
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5933249 |
Image processing apparatus and method
One object of the present invention is to cut out areas of different natures from an image hierarchically. For encoding, an area identifier identifies areas of an input image. A multivalued area is...
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5930403 |
Method and apparatus for half pixel SAD generation utilizing a FIFO based systolic processor
A novel apparatus for and method of calculating the SAD values for half pixels is disclosed. The invention interpolates, in a serial fashion, half pixel values from full pixels contained in a...
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5930398 |
Method and apparatus for determining a quantizing factor for multi-generation data compression/decompression processes
The invention provides techniques for changing the quantization used in multiple generations of selected complexity of data quantization such that the errors incurred in subsequent generations are...
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5930397 |
Apparatus and method for processing image signal
An image signal processor and an image signal processing method arranged to limit a deterioration in image quality at the time of compression and expansion at a low coding rate. Data of an input...
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5926569 |
Bitrate damper for selecting quantization levels for image encoding
For each image, an initial set of quantization (Q) levels is selected based on the pixel data. The pixel data are transformed to blocks of transform coefficients. The initial set of Q levels is...
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5926574 |
Image encoding system
In an image encoding system, an input image signal is blocked, the resultant blocks are transformed into two or more kinds of transformed coefficients, the transformed coefficients are quantized...
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5926573 |
MPEG bit-stream format converter for changing resolution
An apparatus or transforming the resolution of an image from a first image resolution to a second image resolution using operations in the spatial frequency domain. The apparatus converts the...
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5923785 |
System and method for compressing data
A method codes a hierarchical subband system of coefficients of a wavelet transform that is representative of an image. One step of this method includes receiving the coefficients of a wavelet...
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5917952 |
Compression of randomly dithered bi-level images
A bi-level dithered image is compressed using knowledge of the particular dither matrix used to generate the dithered image from an original high resolution grey-scale image. A lower resolution...
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5917953 |
Geometry implicit sampler for polynomial surfaces over freeform two-dimensional domains
In two-dimensional model based image coding, an image is partitioned into domains, and the pixels of each domain are modeled with a polynomial intensity function. An image coded in this fashion is...
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5911010 |
Image communication apparatus and image processing apparatus
There is disclosed a facsimile apparatus, which selects one of a binary hierarchical coding method called, e.g., a JBIG method and an irreversible coding method called, e.g, a JPEG method in units...
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5911006 |
Method and apparatus for controlling a quantity of codes representative of image data
A method and an apparatus for controlling the quantity of codes representative of image data are disclosed. Image data representative of a single scene are thinned and then subjected to orthogonal...
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5909511 |
High-efficiency coding method, high-efficiency coding apparatus, recording and reproducing apparatus, and information transmission system
A high-efficiency coding apparatus is provided which can increase accuracy in motion compensation and also increase processing speed without increasing the circuit scale as compared with the case...
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5909505 |
Color image encoding method and apparatus
This invention relates to an image processing apparatus having a function of encoding or decoding image data and discloses a technique for extracting an image feature, especially a thin image...
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5909510 |
Method and apparatus for document classification from degraded images
A word shape token-based document classification system prepares a plurality of sets of training data degraded by image quality and selects the optimum training data set by examining scores from a...
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5907637 |
Method and apparatus for compressing and decompressing data
A method and an apparatus for compressing and decompressing data employ a splay coding instead of an arithmetic coding to achieve a high speed code entering process. The data compressing apparatus...
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5907638 |
Data compression apparatus, method and system
Conventionally, when compressing data, since data (words) are sequentially retrieved from the head of a dictionary, a large amount of time is required for compression processing. Particularly when...
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5905814 |
One-dimensional time series data compression method, one-dimensional time series data decompression method
A method of compressing one-dimensional time series data at uniform time intervals includes: a first process of inputting the one-dimensional time series data and an approximation accuracy thereof;...
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5905813 |
Image coding apparatus for compressing image data
A data processor in an image coding apparatus includes a zero detecting circuit for determining if the quantized AC coefficients are zero or not; a counter, that is reset periodically, for counting...
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5903671 |
Data compression method and apparatus therefor
In order to enhance the high efficiency for a reversible code, pixel data d i! is input one pixel by one pixel, and a differential value diff is calculated between a present pixel data d i! and a...
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5903679 |
Method for decoding signal vector-quantized by blocks
A method for producing a decoded signal approximate to an original signal upon decoding a quantized signal which is produced by vector-quantizing every block of an original signal or by...
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5903675 |
System and method for compressing data using a dynamically changing compression window
A system and method for efficient image compression begins by segmenting an input image into a current and previous window using a loading module. An encoding module compares the current and the...
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