Abstract: An image decompressing system includes the processes of: a) determining a size of a decompressed image; b) determining a decomposition level to which decomposition-level-type inverse wavelet transform is performed; and c) decompressing given wavelet transform coefficients to the decomposition level determined by the step b), wherein the step b) determines the decomposition level such that wavelet transform coefficients in the thus-determined decomposition level have a size equal to or nearest to the size of the decomposed image determined by the step a).

Abstract: An image decompressing system includes the processes of: a) determining a size of a decompressed image; b) determining a decomposition level to which decomposition-level-type inverse wavelet transform is performed; and c) decompressing given wavelet transform coefficients to the decomposition level determined by the step b), wherein the step b) determines the decomposition level such that wavelet transform coefficients in the thus-determined decomposition level have a size equal to or nearest to the size of the decomposed image determined by the step a).

Abstract: An image processing apparatus includes: a block decompression unit that decompresses, block by block, a compressed code formed of a plurality of blocks into which image data is divided, where the compressed code is encoded block by block; and a rendering control unit that causes a code to be decompressed and rendered on a display unit, where the code corresponds to at least one of the blocks which one is renderable in the rendering region of the display unit.

Abstract: An image processing technique for enabling the extraction of a region of interest from non-compressed files and compressed files in a format other than the JPEG 2000 format is disclosed. Specifically, a compression unit to perform a compression process on an image using the JPEG 2000 format and a decompression unit to perform a decompression process on an image compressed using a format other than the JPEG 2000 format are provided. The designation of a region of interest for an image file stored in a storage region is allowed, and it is determined whether the image file is a non-compressed file or a compressed file in a format other than the JPEG 2000 format. When it is determined that the image file is a non-compressed file, the file is compressed by the compression unit. When it is determined that the image file is a compressed file in a format other than the JPEG 2000 format, the file is decompressed by the decompression unit before being compressed by the compression unit.

Abstract: An apparatus for coding and decoding includes a decoding unit which decodes compressed and coded data to restore original image data, a storing unit which stores additional information other than the image data in memory, and a coding unit which encodes at least a portion of the additional information stored in said memory as information additional to the image data when performing second-time encoding of the image data decoded by said decoding unit.

Abstract: An image processing apparatus includes a decompressing unit decompressing image data having a first data compression format, an obtaining unit obtaining a second data compression format that is applicable for decompression by another image processing apparatus, a re-compressing unit re-compressing the decompressed image data with the second data compression format obtained by the obtaining unit, and a transmitting unit transmitting the re-compressed image data to the other image processing apparatus.

Abstract: In a still image decompression process, operations of respective parts of a still image decompression apparatus are controlled so as to limit the operations into those such that a decompressed image on a specific LL subband is obtained.

Abstract: A syntax interpretation part interprets a syntax of a given code sequence; and a code sequence creation part creates another code sequence based on the syntax interpreted by said syntax interpreting part. The given code sequence and the other code sequence both comprise code sequence decompressable to be transformed into still image data.

Abstract: An image decompressing system includes the processes of: a) determining a size of a decompressed image; b) determining a decomposition level to which decomposition-level-type inverse wavelet transform is performed; and c) decompressing given wavelet transform coefficients to the decomposition level determined by the step b), wherein the step b) determines the decomposition level such that wavelet transform coefficients in the thus-determined decomposition level have a size equal to or nearest to the size of the decomposed image determined by the step a).

Abstract: The improved image compression method and system optimizes a wavelet transform compression technique by further compressing the transformed data by an edge operation before encoding by a conventional technique.

Abstract: A method and system for automatically determining a compression method to be used on a file. A histogram of the file is constructed in order to determine if there are a predetermined number of consecutive byte patterns below a set threshold. If this condition exists, the file is not an image file and compression can be performed using the lossless Lempel-Ziv compression method. If, over the range of the histogram, the file is above the predetermined threshold, the histogram is examined to determine if the average value in the histogram is in a central portion of the histogram. If it is not, the file does not represent an image and again, the Lempel-Ziv compression method is used. If both the byte patterns and the histogram exceed the predetermined threshold and the average of the histogram is in a central portion, the file is determined to contain an image.

Abstract: A communication control unit controls communication between a terminal and a communication network employing a multi-conjunction architecture, and comprises a transmitter/receiver for transmitting and receiving a signal to and from the communication network, a switch part for enabling signal transmission and reception between the terminal and the communication network through the transmitter/receiver in a first state and for disabling the signal transmission and reception between the terminal and the communication network through the transmitter/receiver in a second state, and a control part comprising a signal detecting circuit for detecting whether or not a signal received from the communication network through the transmitter/receiver is intended for the terminal coupled to the communication control unit.