Usage: mrcImageSubtraction Options: [-i1[input1] In1 (NULL )] :Essential :InputDataFile1 [-i2[input2] In2 (NULL )] :Essential :InputDataFile2 [-o[utput] Out (NULL )] :Essential :OutputDataFile [-rmsd RMSD (stdout )] :Optional :Output: [-c[onfig] configFile (NULL )] :Optional :ConfigurationFile [-m[ode] mode (0 )] :Optional :Mode ----- Additional Usage ----- mode 0:out = in1 - in2 1:out = abs (in1 - in2)