In principle, the OOT and FWC image can be subtracted directly from the observation images and the resulting image can be divided by the exposure map. However, the subtraction of the images is not done by eimageget, because in most cases the statistics will require some smoothing. In the case of adaptive smoothing, images from individual exposures should be combined first and be smoothed with the same smoothing template. The task eimagecombine can be used to conveniently combine the individual output images of eimageget.
