Posted: August 22nd, 2008
jhead – Exif Jpeg header manipulation tool
Things jhead can extract from an Exif jpeg file
- Time and date picture was taken
- Camera make and model
- Integral low-res Exif thumbnail
- Shutter speed
- Camera F-stop number
- Flash used (yes/no)
- Distance camera was focused at
- Focal length and calculate 35 mm equivalent focal length
- Image resolution
- GPS info, if stored in image
- IPTC header
- XMP data
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Things jhead can modify in an exif jpeg file
- Up-right images according to rotation tag using jpegtran
- Set or relative adjust internal exif timestamps
- Fix date / time offsets in large batches of images
- Re-name or date stamp files according to exif timestamp
- Transfer exif headers between images
- Replace thumbnails inside Exif headers
- Edit jpeg comments (but not the Exif comments)
- Delete exif or comment sections from jpeg images
- Create new minimal exif header containing date and thumbnail
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I wish I had bothered to search for this tool when I bought my Samsung D900 which fails to write the correct timestamp on the damn photos… oh well, better late then never.
Via Mac OS X Hints (or more precisely, google and the keywords on a comment on that post):
Simply use jhead -dsft *.jpg on the files to set
the EXIF date to the file creation-date
Posted: August 22nd, 2008
Link
When: September, 6 & 7
Where: Coimbra, Portugal
Dep. de Engenharia Informática
da Universidade de Coimbra
I’ve proposed talking about the basics of MySQL performance & optimization. A draft topic list is available here.
I would appreciate your comments:
- Is it boring/useless or something like that?
- Should some of the topics in the draft be left out? (I’m inclined to totally remove the section currently entitled “Pointers”)
- Is there something important I’m missing?
- Any other comments