I’m trying to use this for two different sources for ESB, one from 2004 and another the 19SE. I align the images as best I can before generating the two frames to feed into the tool, but I can’t get it to be exact.

Would it be better to use a higher smoothing parameter? I haven’t seen DrDre recommend anything higher than 0.1, but it can go as high as 1. If the two images are not totally identical (same frame, but the sources aren’t pixel-perfect), is there a drawback to using 1 as the smoothing parameter?