Abstract: An encoding device includes a first memory that stores image data, plural second memories that are associated with plural target pixels in the image data, each second memory storing pixel data of one or more reference pixels near the associated target pixel thereof, a controller that causes each second memory to store pixel data of the one or more reference pixels near the associated target pixel thereof specified from the image data stored in the first memory, and plural encoders that perform encoding on each of the plural target pixels by estimating pixel data of each target pixel using pixel data of the one or more reference pixels near each respective target pixel stored in the plural second memories wherein the plural target pixels have different positions in a subscanning direction such that one target pixel does not overlap with another target pixel in a main scanning direction, and the total amount of data of all of the reference pixels used by the plural encoders is equal to or less than the amount o

Abstract: An image processing apparatus includes an image element allocation unit that allocates image elements included in input image data to any of plural mutually-different coding processings, in accordance with a allocation reference, a coding unit that encodes, by the respective coding processings, the image elements allocated to the respective coding processings by the image element allocation unit, and a reference change unit that changes the allocation reference applied by the image element allocation unit.

Abstract: An encoding device to encode an object image to be encoded includes a reference information generating unit that generates reference information with respect to a key image different from the object image, and a code generating unit that generates code data of the reference information generated by the reference information generating unit as code data of at least a portion of the object image.

Abstract: This invention provides an encoding apparatus including a group generating unit that puts plural information values to be compressed together and generates a group of information values to be compressed; a code assignment unit that assigns a code to each group generated by the group generating unit; and an information encoding unit that encodes the information values to be compressed belonging to each group, using the code assigned to each group.

Abstract: An image processing apparatus includes a criteria setter that sets selection criteria for selecting quantization intensities on the basis of feature indices of an inputted image; an intensity selector that selects, on the basis of the selection criteria set by the criteria setter, one of plural quantization intensities for each partial image area of the inputted image; and a quantizer that quantizes image information on each partial image area with the quantization intensity selected by the intensity selector.

Abstract: An image processing apparatus includes a partitions setting unit that sets up image partitions into which an input image is separated; a tone number setting unit that sets the number of tones for each of the image partitions set up by the partitions setting unit, based on gray levels of pixels included in each of the image partitions; and a conversion unit that converts each of the image partitions of the input image into an image partition represented with tones equal to or less than the number of tones set by the tone number setting unit.

Abstract: An image processing device for compressing image data using conversion to spatial frequency components may include a dividing section that divides the image data into a plurality of pixel blocks and computes spatial frequency components of each pixel block; a segmenting section that computes an intensity of predetermined high frequency components from information of the spatial frequency components and segments the image data into a first plane formed by including a pixel block having an intensity which is less than a predetermined threshold value and into a second plane formed by including a pixel block having an intensity which is equal to or greater than the threshold value; a compression section that executes compression for the first plane image data by applying quantization and entropy coding using the spatial frequency components information; and a run length compression section that executes run length compression of the second plane image data.

Abstract: An image processing apparatus includes: a reference-based coding unit that encodes image information for an image partition having a predefined size by referring to image information for another image partition; an independently coding unit that encodes the image information for the image partition independently of any other image partition; and a bounds defining unit that defines bounds of reference to be made by the reference-based coding unit.

Abstract: An image processing apparatus includes an image partitioning unit that partitions an image represented by input image information into image partitions, each containing plural pixels; a run coding unit that run-length encodes image partitions for which all pixels contained in any of the image partitions match with a pixel value in a predetermined position in another image partition; and an independently coding unit that encodes image partitions other than image partitions encoded by the run coding unit, so that the resulting codes are decoded independently for each image partition.

Abstract: A data processing apparatus includes: an intermediate data generating unit that generates intermediate data expressing input data, which is a subject to be coded, in another expression manner; a coding unit that converts the intermediate data generated by the intermediate data generating unit into code data; and a code quantity evaluating unit that evaluates a code quantity of the code data generated by the coding unit on the basis of a statistical amount of the intermediate data generated by the intermediate data generating unit.

Abstract: An image processing apparatus includes an image partitions manipulating unit that manipulates image partitions of encoded image information, each image partition containing plural values of pixels; a decoding unit that decodes the image information manipulated by the image partitions manipulating unit; and a pixels manipulating unit that manipulates pixels of the image information decoded by the decoding unit, partitioning an image into partitions which are manipulated by the image partitions manipulating unit being changed according to what manipulation is to be performed by the pixels manipulating unit.

Abstract: A coding apparatus includes a predicting unit, an intermediate-code generating unit, a first coding unit and a second coding unit. The predicting unit generates a piece of prediction data based on each piece of pixel data constituting a color image. The intermediate-code generating unit compares each piece of prediction data with the corresponding piece of pixel data, to generate an intermediate code in accordance with whether or not a difference between each piece of prediction data and the corresponding piece of pixel data is in a predetermined range. The first coding unit performs entropy coding on the generated intermediate code. The second coding unit performs entropy coding on the generated intermediate code. The intermediate-code generating unit assigns each generated intermediate code to either of the first and second coding units according to whether or not the difference is in the predetermined range.

Abstract: This invention provides an encoding apparatus including a group generating unit that puts plural information values to be compressed together and generates a group of information values to be compressed; a code assignment unit that assigns a code to each group generated by the group generating unit; and an information encoding unit that encodes the information values to be compressed belonging to each group, using the code assigned to each group.

Abstract: An encoding apparatus includes a block dividing unit that divides an inputted data file into blocks each including plural data elements arranged in the order of encoding, a predicted data creating unit that creates predicted data for each of the blocks resulting from the division by the block dividing unit on the basis of data elements contained in other blocks, a comparing unit that compares the predicted data created by the predicted data creating unit with data elements contained in the blocks, and a code creating unit that creates codes for the inputted data file on the basis of results of the comparison by the comparing unit.

Abstract: To provide an image coding apparatus that can generate a code that can be decoded by a general decoding apparatus while attaining a high coding speed. As a result of processing in a plurality of prediction units 21, a control unit 11 generates a predicted pixel value for a pixel of interest based on a pixel value of a predicting pixel located at a distance from the pixel of interest, the distance being predetermined for each pixel value prediction unit 21, counts, as a run-length for each pixel value prediction unit 21, the number of times that the pixel value of the pixel of interest successively correspond with the predicted pixel value, selects any of pixel value prediction units related to a run-length of one pixel or more, and outputs a code by referring to a predetermined code table with respect to a distance between the pixel of interest and the predicting pixel for the selected pixel value prediction unit 21 and the run-length thereof.

Abstract: An image processing device for compressing image data using conversion to spatial frequency components may include a dividing section that divides the image data into a plurality of pixel blocks and computes spatial frequency components of each pixel block; a segmenting section that computes an intensity of predetermined high frequency components from information of the spatial frequency components and segments the image data into a first plane formed by including a pixel block having an intensity which is less than a predetermined threshold value and into a second plane formed by including a pixel block having an intensity which is equal to or greater than the threshold value; a compression section that executes compression for the first plane image data by applying quantization and entropy coding using the spatial frequency components information; and a run length compression section that executes run length compression of the second plane image data.

Abstract: A data processing apparatus includes: an intermediate data generating unit that generates intermediate data expressing input data, which is a subject to be coded, in another expression manner; a coding unit that converts the intermediate data generated by the intermediate data generating unit into code data; and a code quantity evaluating unit that evaluates a code quantity of the code data generated by the coding unit on the basis of a statistical amount of the intermediate data generated by the intermediate data generating unit.

Abstract: A coding apparatus includes a predicting unit, an intermediate-code generating unit, a first coding unit and a second coding unit. The predicting unit generates a piece of prediction data based on each piece of pixel data constituting a color image. The intermediate-code generating unit compares each piece of prediction data with the corresponding piece of pixel data, to generate an intermediate code in accordance with whether or not a difference between each piece of prediction data and the corresponding piece of pixel data is in a predetermined range. The first coding unit performs entropy coding on the generated intermediate code. The second coding unit performs entropy coding on the generated intermediate code. The intermediate-code generating unit assigns each generated intermediate code to either of the first and second coding units according to whether or not the difference is in the predetermined range.

Abstract: An encoder includes a prediction unit and a code generation unit. The prediction unit predicts target data and judges whether prediction is right or wrong. When the prediction unit judges that consecutive predictions for respective target data are wrong, the code generation unit generates coded data including symbols corresponding to the respective target data for which the consecutive wrong predictions are made, using a code representing number of the consecutive predictions judged as wrong.

Abstract: An image processing device for compressing image data using conversion to spatial frequency components may include a dividing section that divides the image data into a plurality of pixel blocks and computes spatial frequency components of each pixel block; a segmenting section that computes an intensity of predetermined high frequency components from information of the spatial frequency components and segments the image data into a first plane formed by including a pixel block having an intensity which is less than a predetermined threshold value and into a second plane formed by including a pixel block having an intensity which is equal to or greater than the threshold value; a compression section that executes compression for the first plane image data by applying quantization and entropy coding using the spatial frequency components information; and a run length compression section that executes run length compression of the second plane image data.