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 Post subject: Saturn Colour
PostPosted: Sat Mar 13, 2010 9:04 am 
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Joined: Mon Oct 12, 2009 8:07 pm
Posts: 162
Location: Bury
My Saturn image looked a little washed out so I was wondering how do you get more color into the image?

http://www.boltonastro.org.uk/Gallery/displayimage.php?album=lastup&cat=0&pos=2

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Celestron 11" Telescope
Eq6 Pro Mount
Eq5 Mount
EQ Mod
QHY5 Guide camera
Cannon 1000D SLR Camera

I choose to image with an 11" SCT Celestron in this decade and do the other things, not because they are easy, but because they are hard......


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 Post subject: Re: Saturn Colour
PostPosted: Mon Mar 15, 2010 11:33 am 
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Joined: Mon Oct 12, 2009 6:47 pm
Posts: 1255
Location: Bolton
Well Carl, the image looks rather low in contrast - are you sure that you've optimised the camera settings to get the best dynamic range?

Using my Toucam with my f/10 SCT and a Barlow lens, I've been operating the camera at 1/25 sec with the gain set at about 70%. It's also worth playing with the "gamma" and "saturation" seetings on the camera menu.

And once you've finished processing the image with Registax, you can do some more adjustments of the colour balance in a photo-processing progam, such as IRIS:

Attachment:
File comment: The result of post-processing your image in IRIS.
Carl_Sat2.jpg
Carl_Sat2.jpg [ 2.97 KiB | Viewed 5272 times ]

To do this, I performed the following steps:
  • Load the JPEG file;
  • Digital Photo... RGB separation.. into r.pic, g.pic, b.pic
  • Load r.pic file;
  • Open the View... (L)RGB and move the R +1.5 and B -3.5 to to align the colours. Then save this file as temp.pic;
  • Clean up the noise with Processing... Adaptive filter... Noise 5.0;
  • Then View... Colour stretching... Stretch 0.0010, Intensity 2.50;
  • Then View... Saturation adjustment... 1.25;
  • Next, View... White balance... Green 0.97;
  • Now save the file as Carl_Sat2.jpg


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