The writing means which record

摘要

PROBLEM TO BE SOLVED: To easily recognize the date and time of photographing a photographed image. SOLUTION: Whether or not the name of the last directory is in the form of 'Date1-Date2' is judged (S1). In the case that the directory name is in the form of 'Date1-' (S1), a new photographed image is preserved in the directory 'Date1-' by the file name of 'AbcdXXXX.jpg' (S2). In the case that an image file 'AbcdXXXX.jpg' is the last image file that can be housed in the directory (S3), the name of the directory is changed from 'Date1-' to 'Date1-Date3'. Date 3 is the date and time of photographing the image file housed last. In the case that the name of the last directory is in the form of 'Date1-Date2' (S1), the directory 'Date3-' of the name corresponding to the date and time Date3 of photographing the image file to be housed is prepared (S5) and the photographed image is preserved in the directory 'Date3-' as the image file 'Abcd0001.jpg' (S6).