[APML] TSP wide field images and film grain question

["Dick L." <rlocke1@houston.rr.com>]

Dave, excellent images.  I get the same issues (dark/green noise) with LE 400, which is very close or identical to the old supra you're using. I'm using NEAT image now (noise reduction for photoshop, works great but $$$) and it handled that very well.  You can also do a selective color range of the green color, then then play games with desaturating and/or blurring your selection.

-Dick Locke
http://www.dl-digital.com/Astronomy_main.html

Date: Sun, 20 Jun 2004 10:28:42 -0600
From: "Dave Dockery" <dave.dockery@zianet.com>
Subject: [APML] TSP wide field images and film grain question
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Message-ID: <LMEGKILOJHOOGALBDJIBEEIMCNAA.dave.dockery@zianet.com>
Content-Type: text/plain;	charset="iso-8859-1"

Hi All,

I finally had a chance to process some film shots from this year's Texas
Star Party and I wanted to share them and hopefully get some tips on
processing dark nebula to remove noise.  One image in particular (Pipe
Nebula - high res version) has some dark green pixels spread throughout the
dark regions that I assume are some kind of film grain artifacts???  Anyone
know what causes this and how to best process it out?

See: http://www.zianet.com/dave.dockery/NewImages.htm

Comments and suggestions are always welcomed.

Thanks much,
Dave

Dave Dockery
Las Cruces, NM


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