5. The JPEG2000 decoding method of claim 2 , further comprising allowing a user to select, using a selector, whether to read XML data stored in an XML box added into a bit stream constructing said JPEG2000 file in the middle of JPEG2000 decoding executed by the JPEG2000 decoder; wherein, when the choice to read the XML data is selected through the selector, the XML data is read.
2. A JPEG2000 decoding method for receiving and decoding a JPEG2000 file produced using said JPEG2000 coding method described in claim 1 , the JPEG2000 decoding method comprising steps of: decoding said JPEG2000 file to convert it to image data; reading XML data stored in an XML box added into a bit stream constructing said JPEG2000 file in the middle of JPEG2000 decoding; and processing the XML data to acquire text data.