DCRAW is a program, written in C, which takes in raw digital image files (not converted to another lossy format) and decodes them for processing.
Using DCRAW on RCC Resources
DCRAW does not require a module to be loaded before using. In order to run the program, simply call DCRAW from the command line with the options appropriate for your intended application. Use the format:
$ dcraw -OPTIONS FILE
-OPTIONS] is the list of options appropriate for your application and
FILE is the name of your file.
For a quick reference of the available options, simply type the command
dcraw. More detailed usage information is available on the official website.