From: Milton Aupperle <milton@outcastsoft.com>

Date: October 21, 2005 3:50:55 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Re: some thoughts on sampling


Hi Tim and Alan;


On 21-Oct-05, at 3:36 PM, Tim wrote:


But it's amazing that I'd forgotten to try different values.  Probably because the Flea is so

much more sensitive than the Aplux or ToUcam, I thought I could keep working at that

scale.


On a side note - don't forget that Alan is using a monochrome camera and Tim is using a color bayer camera. So Alan winds up getting about 2 to 3 times the resolution your getting Tim for the same focal length. The reason is each pixel on a bayer camera is one (Red or Green or Blue) color, so to reproduce the RGB image , we mix the surrounding pixels to recreate them.


So with color bayer cameras you want to be probably 2x the size you would use for monochrome so that the color of a fine feature is "spread" over the 2 adjacent pixels.


It didn't even occur to me that was my problem after trying all the processing software I'm

familiar with - Registax, Keith's IS, Lynkeos, and of course Astro IIDC.  Results for all of

these were pretty similar, though Keith's and Astro IIDC produced noticeably best results.

And for Registax, since I'm processing video's through Virtual PC, I have to first crop them

to 320x240 with AstroYacker and convert them to AVI with Quicktime Pro before I can run

Registax.


You can convert movies to files (ie tiffs etc.), AVI, Movie and MP4 formats using the "Export Movie..." item under the Video menu in Astro IIDC. It's the same functionality that Apple uses in "Quicktime Pro " - just no $30 extra charge for it.


HTH..


Milton J. Aupperle

President

ASC - Aupperle Services and Contracting

Mac Software (Drivers, Components and Application) Specialist

#1005 - 815 14th Avenue. S.W.

Calgary Alberta Canada T2R0N5

1-(403)-229-9456

milton@outcastsoft.com

www.outcastsoft.com