Jhead
Jhead is a command line driven utility for extracting digital camera settings from the Exif format files used by many digital cameras. It handles the various confusing ways these can be expressed, and displays them as F-stop, shutter speed, etc. It is also able to reduce the size of digital camera JPEGs without loss of information, by deleting integral thumbnails that digital cameras put into the Exif header. If you need to add Exif support to a program, this is a simple program to cut and paste from. Many projects, including PHP, have reused code from this utility.
| Tags | multimedia Graphics Graphics Conversion |
|---|---|
| Licenses | Public Domain |
| Operating Systems | Windows Windows Windows POSIX BSD FreeBSD Linux |
| Implementation | C |
Recent releases
- 07 Feb 2010 09:19
Changes: The handling of various IPTC variants was improved. Mixed-endian files from newer Canon point and shoot cameras are now handled properly.
- 09 Nov 2009 14:56
Changes: A few more tags are now recognized with "-v". Metering mode display was fixed. A crash on certain corrupted JPEGs was fixed. Handling of extra padding bytes between JPEG markers was improved. The strange date encoding of LG VX-9700 is now accepted. Resolution units of the JFIF header are now preserved.
- 03 Mar 2009 10:08
Changes: A recently introduced bug which caused the "-ce" (edit comment field) option to fail was fixed.
- 16 Feb 2009 16:07
Changes: A recently introduced bug with "-ce" was fixed. The ability to move files with the -n option was added. Various minor typo and documentation fixes were made.
- 05 Oct 2008 23:28
Changes: More EXIF tags are decoded in '-v' mode. Several potential string overflows were fixed. A missing deletion of IPTC section on "-purejpg" was fixed. A GPS altitude decode bug was fixed.
mwandel
13 Apr 2000 20:33
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