#1  
Old 18-10-2009, 04:40 PM
TheDecepticon
Registered User

TheDecepticon is offline
 
Join Date: Feb 2008
Posts: 1,223
Green Stars

Another question, can anyone tell me or have they experienced green stars with any of their WO scopes. I can't seem to work out why the M110 shows green stars and seemingly good colour otherwise in the same field captured.
Attached Thumbnails
Click for full-size image (03092009 Lagoon M110 Test.jpg)
125.6 KB40 views
Reply With Quote
  #2  
Old 18-10-2009, 05:40 PM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,704
For one shot colour cameras, the Bayer Matrix over each set of 4 pixels for recording the RGB colour components of the image is made up of x1 Red, x2 Green and x1 Blue pixels due to the filters above those pixels. Therefore, there are twice as many G filters as there are R or B.

When using one shot colour cameras, should one be compensating for the x2 Green filtered pixels?

Cheers

Dennis

PS - nice image!
Reply With Quote
  #3  
Old 19-10-2009, 04:23 PM
spearo's Avatar
spearo (Frank)
accepts all donations

spearo is offline
 
Join Date: Feb 2006
Location: Braidwood (outskirts)
Posts: 2,281
Decepticon,Dennis,
Is it just an artifact of processing?
I've found inthe past using DSS to stack my dslr shots that i still need to check levels inPS.
What seems like ok colors may actually be a tad off.
in PS i use the the eye drop to select a star that should be white and then adjust the three levels of red, blue and green to ensure they all hit the same number, usually 255 inthe info window
hope this helps

frank
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 08:26 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
Bintel
Advertisement