Astronomical images are not easily viewed on standard image processing / showing software. You need to perform an initial stretch of the data. All the capture software makes a "virtual stretch" while they are capturing images, so you can see what you are shooting at. But they store the original (linear, non stretched) data.

The best approach will be to use some viewer specific to handle astronomical image. For example, you can use SiriL (siril.org/download/). It's open source and it can help you to align / stack / colour correct and save as stretched TIFF or PNG image

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There are also errors when trying to install pyindi-client on Astroberry or macOS. So basically it's only working on desktop Linux

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Rafa Barberá replied to the topic 'Announcing StellarSolver 2.0' in the forum. 3 days ago

Yes, now I see... I've used a FITS directly extracted from a OSC camera, that's a mono one with the bayer pattern on it. The use case is first, debayering this image, and the pass the RGB image to stellarsolve. Understood. Now I'm able to see the differences clearly.

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Rafa Barberá replied to the topic 'Announcing StellarSolver 2.0' in the forum. 5 days ago

Hi Rob,

I've been playing with some images and Stellarsolve test program and there is a thing that I can't understand. I've used the attached image. As you can see red/blue channels are complete different (red focused, blue out of focus), but when I use SEP w/HFR or External SExtractor w/HFR I get the same value for the HFR for each star on both channels. I expected very different results when I select red or blue channel and this is not the case. What I'm doing wrong? Because if Stellarsolve can't see any difference on HFR, the focuser algorithm will be unable to use those different channels to improve the focus point.

File Attachment:

File Name: M_51_Light_RGB_300_secs_2022-05-07T21-10-33_006.fits.zip
File Size: 12,806 KB


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Rafa Barberá replied to the topic 'Announcing StellarSolver 2.0' in the forum. 1 week ago

Yes, don’t worry, I understand the process. I’m currently using your test program. I’ve only checked out your colourChannel branch and built the test program. I was playing with it. The detail I was missing was the HFR option in the combo. Thanks for this clue ;)

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Rafa Barberá replied to the topic 'Announcing StellarSolver 2.0' in the forum. 1 week ago

Hi Rob,

I've been able to compile and run the new version on a Raspberry PI, but after source extraction or plate solving, I can't find any reading of the HFR to FHWD. I've assumed that was Stellarsolve who compute those magnitudes. I know that I must be missing something

Regards

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Rafa Barberá replied to the topic 'Announcing StellarSolver 2.0' in the forum. 1 week ago

Yes, I'll follow this route. In fact, my next step on the first clear night will be to get a complete set of OSC images around the focus point, so we can experiment with them

Regards

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Rafa Barberá replied to the topic 'Announcing StellarSolver 2.0' in the forum. 1 week ago

Good to know about your progress. Very encouraging indeed :). I've been looking at the sources, so now I have more questions:

* I like the approach to use only monochromatic images. I've seen that you have limited the code, by now, to the individual channels (ColorChannel enum and the new m_ColorChannel property), but with the current the implementation it will be also posible to change the InternalExtractorSolver::getFloatBuffer and ExternalExtractorSolver::saveAsFITS to easily handle the "average" mode (in which the three color channels are averaged to generate a "Luminosity" channel). It's still not clear for me which approach will be the best: use the green channel or compute a synthetic luminosity one and work with it, and it's encouraging to see that the current implementation will allow to experiment with this also.

* How is StellarSolver linked with KStars?. Dynamically or statically? As I'm an Astroberry user, I've setup a Raspberry Pi to build KStars / StellarSolver. But it's a real pain to build KStars each time (it takes multiple hours)... do you have any trick to accelerate build times?

Thanks a lot for all the work on this issue!

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Rafa Barberá replied to the topic 'Announcing StellarSolver 2.0' in the forum. 2 weeks ago

Hi Rob,

How are those experiments progressing?. Did you manage to advance on this issue?

Regards

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There were a bug on 2.7.09. Please download the new 2.7.10 release. It should works

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