| Author | Message | ||
     Scott Carson New member Username: Scott Post Number: 7 Registered: 02-2004 |
Please use this thread to post astrophotography tips and techniques. | ||
| Scott Carson New member Username: Scott Post Number: 8 Registered: 02-2004 |
Red "hue" removal from Canon Rebel images Jonathan's recommendation... "Try using Color Balance and set the Highlight Color to Remove to varying shades of red." This solution worked well. I used the Probe to select the offending "hue" and then reset the Blue and Green curves to neutral. I then moved the Red curve a bit to fine tune the correction. The profile can also be saved allowing you re-use these Canon Rebel specific settings. After saving the new image, I then re-opened the Color Balance and applied the Full Range option which darkens the sky and brightens the stars. Probably need to experiment more with this option to ensure the finer details are not being removed from the image. | ||
| Scott Carson New member Username: Scott Post Number: 9 Registered: 02-2004 |
Deconvolution - Sharpening Astro Images The following PWP Blur -> Composite process made significant improvements on a globular cluster image (M13) which had significant blurring due to poor focus. Note that a a subsequent post also recommended trying Soft Light which sometimes produces better results. Post by Dieter Mayr Posted on Thursday, July 14, 2005 - 03:31 am: You refer to the following method: http://www.luminous-landscape.com/tutorials/high-pass-sharpening.shtml Translated into PWP this means: Creating the high pass image: Blur, Method: Highpass with Radius 10. Comosite the original image with the high pass, Method: Hard Light. If you look at: http://www.pegtop.net/delphi/blendmodes/ under High Pass, you find the transformations curve and formula. The 50% grey parts (wich are smooth in the original image) are not affected, and at the edges, where the high pass image is not 50% grey, you get an enhanced contrast, wich makes the image look sharper. |
