Search found 16 matches

by jimv
Tue Oct 11, 2016 7:14 pm
Forum: Tutorials & Guides
Topic: Video tutorials
Replies: 1
Views: 22948

Re: Video tutorials

admin wrote:Hi all,

We now have 6 video tutorials up on YouTube.

You can access them through the StarTools YouTube channel.
This is great! Thanks!

jim
by jimv
Fri Apr 29, 2016 7:43 pm
Forum: Image Processing Troubleshooting
Topic: [New User] Request Processing Assistance?
Replies: 4
Views: 2541

Re: [New User] Request Processing Assistance?

You know, the background does get handled in the denoise step. It is just that if you have developed so that there is heavy background noise, there is a background that is not too dark, but it is quite smooth. That means that you can open it for example in photoshop and apply a curve to darken it, ...
by jimv
Wed Apr 20, 2016 3:02 pm
Forum: Image Processing Troubleshooting
Topic: [New User] Request Processing Assistance?
Replies: 4
Views: 2541

Re: [New User] Request Processing Assistance?

Hi Jim i had a quick try at you data and below is my result and workflow i think autodev just overdid it on your image. For me, contrary to Ivo's advice, I prefer to use develop instead of autodev. I seem to get better results and have more control that way. I might be able to do better if I devote...
by jimv
Tue Apr 19, 2016 4:39 pm
Forum: Image Processing Troubleshooting
Topic: [New User] Request Processing Assistance?
Replies: 4
Views: 2541

[New User] Request Processing Assistance?

Hi, I'm a new user of StarTools (1.4 alpha). [*]A link to my starting image is: https://onedrive.live.com/redir?resid=83E0AB8033CF6569!570&authkey=!AChkJDNYSkltD9Y&ithint=file%2cfit [*]A link to my final StarTools image is: https://onedrive.live.com/redir?resid=83E0AB8033CF6569!569&authkey=!AGobirNX...
by jimv
Mon Apr 11, 2016 1:13 pm
Forum: General Discussion
Topic: Possible Artifacts in Image Capture?
Replies: 5
Views: 4177

Re: Possible Artifacts in Image Capture?

Hmmm... not sure I can spot it very well, but if we're talking about vertical or horizontal lines, these would be the hallmarks of "banding". Applying bias frames should help with this. Dithering could also help. Sometimes, saturated wells (as caused by very bright stars) can cause blooming (vertic...
by jimv
Tue Apr 05, 2016 8:07 pm
Forum: General Discussion
Topic: Possible Artifacts in Image Capture?
Replies: 5
Views: 4177

Re: Possible Artifacts in Image Capture?

Sorry for the wasted bandwidth. I see the image attachment was not included in my previous post do to a 512kb size restriction. So, I have attached it to this posting.
by jimv
Tue Apr 05, 2016 7:59 pm
Forum: General Discussion
Topic: Possible Artifacts in Image Capture?
Replies: 5
Views: 4177

Re: Possible Artifacts in Image Capture?

Which artefacts are you referring to in particular? The mottling perhaps? Sorry for the lack of clarity in the original post. I am referring to the vertical bands - two of which are enclosed in rectangles in the attached, annotated version of the original, screen capture. Flats may fix that... I do...
by jimv
Sat Apr 02, 2016 8:31 pm
Forum: General Discussion
Topic: Difference between TIFF and FITS files
Replies: 5
Views: 6722

Re: Difference between TIFF and FITS files

These are considerably different file sizes, so what is different about FITS files ... Thanks - Ian I believe the difference is FITS file metadata (headers) are in a human readable (ASCII) form while TIFF file metadata is not. The ASCII format is not as compact. You can load a FITS file into an edi...
by jimv
Wed Mar 30, 2016 5:56 pm
Forum: General Discussion
Topic: Possible Artifacts in Image Capture?
Replies: 5
Views: 4177

Possible Artifacts in Image Capture?

Hi, Attached is another example of artifacts present in a single, non reduced (no bias, dark, flat), debayered exposure as rendered by StarTools version 1.3.5.289. Previous experience ( http://forum.startools.org/viewtopic.php?f=4&t=961 )] revealed an error in the image capture tool (TheSkyX) when s...
by jimv
Sat Mar 26, 2016 1:27 pm
Forum: General Discussion
Topic: [New User] Checkerboard Pattern in Image?
Replies: 14
Views: 11713

Re: [New User] Checkerboard Pattern in Image?

Images captured with one tool (TheSkyX Professional) can not be correctly reconstructed with any x,y offset combination in either PixInsight or Nebuylosity4. As a final followup on this, Terry Platt (Starlight Xpress) has confirmed TheSkyX is introducing a luminance fluctuation ( https://groups.yah...