I want to write a simple script to rename digital photo files. The counter on the camera sometimes gets reset (so all files are not unique anymore) and I'm combining pictures from several cameras. If I name all the files after the shooting time (in a suitable text representation), they will all sort together in chronological order, regardless of which camera they came from.

The file time is not useful because it sometimes gets lost, and editing the file (even turning it 90 degrees) "touches" it.

The time the picture was taken is recorded inside the JPEG file. All the cameras used by my family (and probably any modern camera) uses the EXIF records, which is embedded in the file. Tools like Thumbs Plus will show this information.

How can I read that info in Perl? Has anyone already come up with a EXIF record reader module, or does one of the graphics modules include this ability?

Thanks,
—John

In reply to reading EXIF tags in JPEG files ? by John M. Dlugosz

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