Image processing apparatus and image processing method

An image processing apparatus comprising:

• decoding means for decoding encoded data generated by encoding a line block derived from the division of image data of a predetermined number of lines by hierarchical analysis filter processing into different frequency bands, said line block including at least one line of coefficient data of the lowest frequency component subband, said line block being further made up of a group of coefficient data of different subbands;
• coefficient data sorting means for sorting said coefficient data obtained through decoding by said decoding means from the order in which the data is decoded by said decoding means into an order in which the data is subjected to synthesis filter processing;
• and
• synthesis filter means for performing said synthesis filter processing hierarchically so as to transform into said image data said coefficient data of the different subbands sorted by said coefficient data sorting means.

An image processing method for use with an image processing apparatus, said image processing method comprising:

• causing decoding means of said image processing apparatus to decode encoded data generated by encoding a line block derived from the division of image data of a predetermined number of lines by hierarchical analysis filter processing into different frequency bands, said line block including at least one line of coefficient data of the lowest frequency component subband, said line block being further made up of a group of coefficient data of different subbands;
• causing coefficient data sorting means of said image processing apparatus to sort said coefficient data obtained through decoding from the order in which the data is decoded into an order in which the data is subjected to synthesis filter processing;
• and
• causing synthesis filter means of said image processing apparatus to perform said synthesis filter processing hierarchically so as to transform into said image data said coefficient data of the different subbands having been sorted.