Most digital cameras produce EXIF files, which are JPEG files with extra tags that contain information about the image. The EXIF library allows you to parse an EXIF file and read the data from those tags.
lrwxrwxrwx 1 root root 16 déc 22 2003 /usr/lib/libexif.so.9 -> libexif.so.9.1.2 -rwxr-xr-x 1 root root 78800 déc 22 2003 /usr/lib/libexif.so.9.1.2 drwxr-xr-x 2 root root 0 déc 22 2003 /usr/share/doc/libexif9-0.5.12 -rw-r--r-- 1 root root 24687 jui 27 2003 /usr/share/doc/libexif9-0.5.12/ABOUT-NLS -rw-r--r-- 1 root root 26426 aoû 10 2003 /usr/share/doc/libexif9-0.5.12/COPYING -rw-r--r-- 1 root root 10795 aoû 10 2003 /usr/share/doc/libexif9-0.5.12/ChangeLog -rw-r--r-- 1 root root 2300 aoû 10 2003 /usr/share/doc/libexif9-0.5.12/README -rw-r--r-- 1 root root 5719 déc 22 2003 /usr/share/locale/de/LC_MESSAGES/libexif-9.mo -rw-r--r-- 1 root root 56607 déc 22 2003 /usr/share/locale/es/LC_MESSAGES/libexif-9.mo -rw-r--r-- 1 root root 26576 déc 22 2003 /usr/share/locale/fr/LC_MESSAGES/libexif-9.mo