In the first embodiment according to the present invention, for example, to correspond the partial region in the original image specified by the user to {TAIL ~ a position} of the particular region of the compressed image data to be read from the file medium, {HEAD ~ the original image} is subdivided into a plurality of subregions in advance and the recording position of the compressed data associated with each subregion is stored in an index record when the image data is registered to a file 
In the first embodiment according to the present invention , for example , to correspond the partial region in the original image specified by the user to { TAIL ~ a position } of the particular region of the compressed image data to be read from the file medium , { HEAD ~ the original image } is subdivided into a plurality of subregions in advance and the recording position of the compressed data associated with each subregion is stored in an index record when the image data is registered to a file
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH