JPG files from cameras contain EXIF data. This describes the picture, the camera, when the shot was taken, etc.

In order to read the EXIF data you need libexif. This is probably already installed. Another thing you need is exif. This doesn’t seem to be available in an RPM. You have to build it yourself with the usual, download, tar zxf (for tar.gz), ./configure, make, make install. There’s also a graphical version. You need to use the same incantation for libexif-gtk and gexif in that order.