imcalc provides basic arithmetic operations plus a host of other functions described in the help file.
cl> images
im> imcalc ``imdd = 1.72* imcc.imh '' # multiply the value in each
# pixel of imcc.imh by 1.72.
# write output to imdd.imh
im> imcalc ``temp_sub=cyg_HSD.imh-40*prf_smo.imh'' # 40 times the
# (smoothed) model prf is subtracted from cyg_HSD.imh
See Section for another example.