In 3.6.6 I added a new feature in the FITS Viewer to overlay DSS on the image with some transparency (50% by default and can be changed in Configure KStars --> FITS). All that is required is a FITS image with WCS headers.



One issue I ran into and is yet unresolved is that of projection system. The DSS image is drawn using a project instance (that defaults to Lambert Azimuthal Equal-Area) and while this a good approximation, I can't get a 100% matching overlay without adjusting offsets in the FITS settings window. Akarsh suggested we use Gnomic projection since it is what a perfect camera would capture, but that didn't make much of a difference. I think the issue is probably related the optical system of the image, each optical system is probably unique and comes with its own distortions and aberrations. At least this is my theory as to why I can't get a 100% match between the DSS overlay and the captured images. Thoughts?

Great addition!

It would be beneficial if this could be added to the Setup tab on the preview window too (while having live stacking capability there would be even greater!)

Jasem, I can see that the feature is not working both on StellarMate OS and Mac OS Kstars version nor on FITS viewer or Preview window.
Are any additional steps needed?

What is the amount of offset you are referring to?

It only works with offline DSS overlay now.

Jasem, do you mean with those packages? Cause this is how I use it.

Yes these should work. Can you share a link to the FITS file above?

Yeah sure.

www.dropbox.com/scl/fi/werhezbdb9uih82pq...bg2xz1gpvk4iskq&dl=0

To anyone who may concern, the features works if you turn on the "Auto WCS" option.




But @Jasem, the HIPS offset doesn't seem to have any effect. I can't see any overall movement, both on the preview window or FITS viewer.

In addition to that, I've tried to open the same FITS file on my Mac and it doesn't work, nor on the StellarMate app.

so it depends if FITSViewer has this feature working? I think DSS Offline is probably not properly set.

I've noticed that I had the Auto WCS feature unchecked, back from the old RPI days

Yesterday I captured with this setting ON and instantly the feature worked on my StellarMare OS mini PC, except for the offset feature. I've messed around quite a bit with those numbers and I couldn't see any change.

My previous post above with the HIPS files, is from my Mac. I think that this is all we have to do for the DSS offline. After a few minutes, this pop-up appeared.

Hi,

I´m not sure if I configured everything fine, but it is not working for me.

I downloaded the DSS files from another post (I think Euripides sent the link a year ago, Norder 1 to 5) and I put them in /usr/share/kstars. I configured Kstars to read the DSS files from this folder:



I also checked the auto WCS option:



But when I open an image I taked some weeks ago with the fits viewer, new button to see the HIPS doesn´t appear:



Does it only works with images taked with auto WCS option checked? Or I forgot something.

Another question I have is: is auto WCS too heavy for a RPi4?

Thanks and regards.

Just checking: Did you try to maximize the window? For example, my images automatically have this size window, and as you can see there is a gap between the EQ grid and Histogram, exactly like yours.

But if I change the window size, all the icons are right there: