Hello Mark,
Alnitak is arguably one of the most difficult stars to tame in an image. The way I approach any bright star is to treat the glare as a point source. You can do this by making quite a large circular mask with a heavy feather . This will allow you to reduce its intensity radially which I tend to do it in smaller increments rather than one large step.
Hope this helps you
Regards
Peter
Alnitak is arguably one of the most difficult stars to tame in an image. The way I approach any bright star is to treat the glare as a point source. You can do this by making quite a large circular mask with a heavy feather . This will allow you to reduce its intensity radially which I tend to do it in smaller increments rather than one large step.
Hope this helps you
Regards
Peter
Peter Shah - Collimation & Telescope servicing.
Visit my personal imaging website at astropix.co.uk
For Image Processing Tutorials
Contact: pete@ccdimaging.co.uk
We can supply your new high quality Newtonian or Dall Kirkham Astrograph
Visit my personal imaging website at astropix.co.uk
For Image Processing Tutorials
Contact: pete@ccdimaging.co.uk
We can supply your new high quality Newtonian or Dall Kirkham Astrograph
Peter Shah
Roboscopes Observatory Controller
Also another point is generally its the shorter wavelengths that are more effected by glare as the signal tends to scatter more. It effects the blue and greens so on images and when you do a brightness change it can cause colour casts in the underlying emission, so you may need to also adjust the colour balance.
Peter Shah - Collimation & Telescope servicing.
Visit my personal imaging website at astropix.co.uk
For Image Processing Tutorials
Contact: pete@ccdimaging.co.uk
We can supply your new high quality Newtonian or Dall Kirkham Astrograph
Visit my personal imaging website at astropix.co.uk
For Image Processing Tutorials
Contact: pete@ccdimaging.co.uk
We can supply your new high quality Newtonian or Dall Kirkham Astrograph
Peter Shah
Roboscopes Observatory Controller
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Peter
Thanks - I shall give this a go. Will look up to see how to do that in PI, but may be this part is easier to do in photoshop...
Regards
Mark
Thanks - I shall give this a go. Will look up to see how to do that in PI, but may be this part is easier to do in photoshop...
Regards
Mark
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