From: "doodlebun" <gbleser@bellsouth.net>

Date: February 16, 2009 8:38:46 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: double hump histogram question

 We've been doing a lot of photography of Saturn lately and although 

we usually get a single hump histogram after image analysis, we often 

get two humps with a large distance between them. We proceed to slide 

the confidence lever anyway to get a portion of frames to use for 

stacking and usually everything seems OK in the final processed image. 

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.

  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.