The VICAR image processing system is now available in Open Source form: http://www-mipl.jpl.nasa.gov/vicar_open.html
VICAR is an image processing system developed and used by the Multimission Image Processing Lab at JPL. With origins in 1966, it is quite possibly the oldest continuously used image processing system in the world.
VICAR was developed for use with JPL’s planetary missions, from Surveyor up to the present day. The majority of JPL’s planetary missions that have cameras use VICAR in some way, up to and including the current Mars landers/rovers (MER, MSL, InSight, Mars 2020).
The VICAR format is compatible with both PDS 3 and PDS 4. Many missions have supplied data to PDS 3 in VICAR format, with detached or attached PDS labels: MSL, MER, Phoenix, Cassini, Galileo, Voyager, Magellan, MEX (HRSC), and many older missions. InSight and Mars 2020 will supply VICAR images with detached labels to PDS 4.