From: "Milton Aupperle" <milton@outcastsoft.com>

Date: February 16, 2009 2:18:27 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: double hump histogram question

--- In Astro_IIDC@yahoogroups.com, "doodlebun" <gbleser@...> wrote:

I wish there was a way to see what the images looked like that were 

analyzed and wound up in the "little hump".  I suspect that passing 

clouds dimming some of the images in the movie frame are involved.

You can already.

In the "Stacking Option" Window, check mark "Manually select frames

for stacking" (page 29 of the manual).

When you get to the "Sharpness Histogram" sheet, set the Confidence

Interval slider so that it is on the middle of the lower second hump

(page 36 of the manual).

When the "Manual Frame Selection" sheet appears scroll down to the

bottom of the sharpness list and then click on the last number shown

(page 39 to 41). On the right hand side is the list is the frame  that

corresponds to that sharpness value, which shows you the frame(s) in

the middle of the second Hump.

  Also we overexposed Saturn to bring up the intensity of the moons 

nearby but Astro IIDC will often say "cannot stack images. Perhaps 

something is wrong with the parameters we are choosing. Obviously these 

deep images have Saturn completely saturated to white with fuzz around 

the boundry.

Then don't pick Saturn as the subject for pixel alignment, as big

white blobs with changing fuzzy edges have nothing solid to lock onto

for pixel comparisons. Pick the small moon(s). I am revising the

section on picking selection areas, and some of it is covered in the

early partial draft of it is included in the Read ME First document

for the beta version of Astro IIDC 4.02.00.

And since I haven't seen your stacking log or which version of Astro

IIDC your using, I'm guessing at what options your actually using, so

some of this may or may not even apply or be relevant. That's why I

prefer this to be all off list and direct e-mail, because right now we

have clutters up the board with at least 5 messages before I can even

guess at what your actually doing.

HTH..

Milton Aupperle