Encoded data generation method and apparatus, and image processing method and apparatus

An encoded data generation apparatus in a second computer which comprises storage means that stores fragmentary first encoded data of encoded data managed by a first computer, comprising:

• first storage means for storing the fragmentary first encoded data of the encoded data managed by the first computer;
• calculation means for calculating short second encoded data on the basis of encoded data required to generate JPEG2000 encoded data in the second computer, and the first encoded data stored in the storage means;
• request means for requesting of the first computer the calculated second encoded data;
• acquisition means for acquiring the second encoded data from the first computer;
• second storage means for storing the acquired second encoded data;
• segmentation means for segmenting the encoded data into a plurality of independent encoded data by interpreting header information of the acquired second encoded data;
• determination means for determining for each unit segmented by said segmentation means if all encoded data which form the independent encoded data are stored in said first or second storage means;
• third storage means for, when not all encoded data which form the independent encoded data are stored, storing dummy encoded data in correspondence with non-stored encoded data;
• and generation means for generating JPEG2000 encoded data using the encoded data stored in said first, second, and third storage means.

A program for making a second computer, which comprises storage means that stores fragmentary first encoded data of encoded data managed by a first computer, generate JPEG2000 encoded data, comprising:

• a calculation procedure for calculating short second encoded data on the basis of encoded data required to generate the JPEG2000 encoded data in the client, and the first encoded data stored in the storage means;
• a request procedure for requesting of the server the calculated second encoded data;
• an acquisition procedure for acquiring the second encoded data from the server;
• a storage procedure for storing the acquired second encoded data in the storage means;
• a segmentation procedure for segmenting the encoded data into a plurality of independent encoded data by interpreting header information of the acquired second encoded data;
• a determination procedure for determining for each unit segmented in the segmentation procedure if all encoded data which form the independent encoded data are stored in the storage means;
• a dummy storage procedure for storing, when not all encoded data which form the independent encoded data are stored, dummy encoded data in correspondence with non-stored encoded data;
• and
• an output procedure for outputting the encoded data stored in the storage means as the JPEG2000 encoded data.

An image processing method to be executed by an image processing apparatus, which receives, from an apparatus that holds encoded data of an image which is segmented into tiles each consisting of a plurality of logical units and a format of which allows a plurality of different orders of logical units, data of an arbitrary number of logical units required to obtain a desired image for each tile, comprising:

• a management information generation step of generating management information used to manage respective logical units to be received;
• a sorting step of sorting the received logical units in accordance with numbers of tiles to which the respective logical units belong, and also sorting the respective logical units which belong to an identical tile in accordance with an order in that tile;
• and
• a registration step of sequentially appending data of the logical units sorted in the sorting step to the management information, and registering, in the management information, information allocated with locations of data of the respective logical units in the cache data that contains the appended data of the logical units and the management information.

An image processing apparatus, which receives, from an apparatus that holds encoded data of an image which is segmented into tiles each consisting of a plurality of logical units and a format of which allows a plurality of different orders of logical units, data of an arbitrary number of logical units required to obtain a desired image for each tile, comprising:

• management information generation means for generating management information used to manage respective logical units to be received;
• sorting means for sorting the received logical units in accordance with numbers of tiles to which the respective logical units belong, and also sorting the respective logical units which belong to an identical tile in accordance with an order in that tile;
• and
• registration means for sequentially appending data of the logical units sorted by said sorting means to the management information, and registering, in the management information, information allocated with locations of data of the respective logical units in the cache data that contains the appended data of the logical units and the management information.