Search found 184 matches

by almcl
Tue Jan 12, 2021 5:05 am
Forum: Image Processing Troubleshooting
Topic: strange data from narrowband
Replies: 14
Views: 761

Re: strange data from narrowband

The ASTAP stack is less noisy and I think shows slightly better detail. Here is crop of the central area of a run of 30 lights and 30 flats from last week, side-by-side for comparison:. The DSS stack first: DSS Stack.jpg --- ASTAP stack.jpg They may have been processed slightly differently in StarTo...
by almcl
Mon Jan 11, 2021 5:15 pm
Forum: Image Processing Troubleshooting
Topic: strange data from narrowband
Replies: 14
Views: 761

Re: strange data from narrowband

I mis-spoke above - it actually took 31 minutes to process 30 light frames.
by almcl
Mon Jan 11, 2021 12:46 pm
Forum: Image Processing Troubleshooting
Topic: strange data from narrowband
Replies: 14
Views: 761

Re: strange data from narrowband

I think so, although I may have left the Colour smooth box checked and it definitely did not like my Bayer pattern setting. Just running it through again with (hopefully) these points addressed, but it is still looking to be a 15 minute job.
by almcl
Mon Jan 11, 2021 10:25 am
Forum: Image Processing Troubleshooting
Topic: strange data from narrowband
Replies: 14
Views: 761

Re: strange data from narrowband

I've tried ASTAP a couple of times and had great difficulty getting it to work with the Canon raw files, but have since tried with the .fit files generated by my (new) ASI 2600. While it seems happier with these, it is painfully slow. A stack that DSS would have dealt with in under 3 minutes ASTAP i...
by almcl
Fri Jan 08, 2021 10:32 am
Forum: Image Processing Troubleshooting
Topic: strange data from narrowband
Replies: 14
Views: 761

Re: strange data from narrowband

Hi Richard, nice to hear you are still up and running! By no means an expert in this, but I think you need to stack all the narrow band images separately but use just one reference frame. There is, as you say, quite a bit of displacement between the Ha channel and Sii and Oiii and I don't think it w...
by almcl
Mon Dec 14, 2020 9:33 am
Forum: General Discussion
Topic: tool tips for 1.7
Replies: 11
Views: 1119

Re: tool tips for 1.7

I have found this too, in particular in the Shrink module none of the '?' buttons respond.
by almcl
Sun Nov 22, 2020 12:04 pm
Forum: Image Processing Troubleshooting
Topic: Tiff file from ICE not accepted.. (mosaic stitching)
Replies: 2
Views: 146

Re: Tiff file from ICE not accepted.. (mosaic stitching)

Perhaps the answer is to process each part of the mosaic in StarTools first, then import the StarTools images into Microsoft's Image Composite editor?

I find ICE can deal with this very well, particularly adjusting background levels.
by almcl
Fri Nov 20, 2020 10:56 pm
Forum: Image Processing Troubleshooting
Topic: Auto star shrink
Replies: 6
Views: 791

Re: Auto star shrink

Don't use the 'Shrink' button within the mask module - that's for changing the size of the mask. To change the size of the stars, having created your mask, 'Keep' it and then, when back on the main page, select the Shrink button there: shrink.jpg Here's what I got when operating on your image above,...
by almcl
Mon Nov 16, 2020 10:24 am
Forum: General Discussion
Topic: Help Me Process My PacMan Data
Replies: 6
Views: 686

Re: Help Me Process My PacMan Data

I thought this dso object should be reddish, am I wrong? Maybe these colors are due to the filters used? This object has been acquired using narrow band filters. Each filter produces a monochrome image. These individual monchrome channels can be assigned to any colour when combined in post processi...
by almcl
Sun Nov 15, 2020 10:27 pm
Forum: General Discussion
Topic: Newbie trying to figure out StarTools,
Replies: 15
Views: 1398

Re: Newbie trying to figure out StarTools,

I think it would definitely be worth stacking the different exposure lengths separately - almost uniquely for this target this seems to work. But normally settle on an exposure length that doesn't blow out the star cores and gives a histogram (if your camera and software support that) somewhere betw...