Digital Photo Cameras use the Exif metadata standard to store image metinformation (geotag, image properties, timestamp) in the (JPG, TIFF) image.

• EXIF = Exchangeable image file format
• http://www.exif.org/
• http://www.iptc.org/
• flickr: exif and filename mass-manipulation software

• http://www.controlledvocabulary.com/imagedatabases/programs.html
• http://www.stuffware.co.uk/cheese/
• Image Info Toolkit → http://www.picturefinder.com/software/iit/welcome.html

• Perl library → Image:Exiftool
• Binary → exiftool
• http://en.wikipedia.org/wiki/ExifTool
• http://www.sno.phy.queensu.ca/~phil/exiftool/
• http://www.sno.phy.queensu.ca/~phil/exiftool/ExifTool.html

• use ImageMagick tool to read EXIF in JPG file
  

  > identify -verbose IMG_8148.JPG | grep DateTimeOriginal
      exif:DateTimeOriginal: 2015:11:09 17:18:55

• exiftool (not part of ImageMagick)
  • manual

  • # example
    exiftool "-FileName<CreateDate" -d "%Y%m%d_%H%M%S.%%e" DIR
    # keep original filename:
    exiftool '-FileName<CreateDate' -d d%Y%m%d-%H%M%S-%%f.%%e DIR

  • http://search.cpan.org/dist/Image-ExifTool/