|
Hi
Jim,
I've
tried both Average and Median settings, but personally I prefer to only
register and crop the images in RegiStar, then combine them in Picture
Window. RegiStar is absolutely great for registration and cropping,
but the amount of control available in PW is far superior for the actual
composite. After registration, all you have to do is crop one image to
match the other, and then you can open both in PW and use the Composite
transformation without doing any alignment.
One advantage of doing the composite in PW is that
you can use masks to avoid blowing out stars, bright objects, etc.
It's helpful for stacking meteor shots, for instance, since you can
mask the meteors, and then do an Add composite in PW that only adds
what's in the mask (the meteors) by manipulating the slider controls. The
core of M42 might be an example of doing a Blend in PW where
you combine everthing but the masked core area to avoid blowing it
out. Sometimes I mask off the bright stars in one of the stack images to
avoid blowing them up. You can also try masking just the faint stuff and
doing an Add or a Blend in PW. Building masks is an acquired skill,
but after you get the hang of it, you'll use them all the time for many
operations.
BTW,
thanks so much for the MI-250 manual!!
|