Binary package “dcraw” in ubuntu trusty

decode raw digital camera images

 This utility converts the native (RAW), format of various digital
 cameras into netpbm portable pixmap (.ppm) image. Supports the
 following models: Canon, Kodak, Olympus, Nikon, Fuji, Minolta and
 Sigma (see http://www.cybercom.net/~dcoffin/dcraw/ for full list)
 Note: This utility does not read directly from the cameras, only
 the files after they have been downloaded, use gphoto2 for that.