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8 years in the making. The book goes to print in September, but since I self-publish, we're starting to take pre-orders now. This helps us knowing how many books to print for the first batch. Thanks to all who have suggested or even asked me over all these years to get this done!  Paper copy and ebook (plus a couple of videos + some actual data to process).

The link to learn more about the book, preorder it, etc:

The blurb:

Mastering PixInsight does much more than covering PixInsight from A to Z. In addition to including the most complete PixInsight Reference Guide on the planet to date, the book takes an intimate look at RBA's huge private repository of countless personal processing tips, "tricks", methods and know-how accrued over more than ten years.

This is the book where RBA gives everything he's got, and more.

The book has stuff for everyone, from those who enjoy quick and uncomplicated (but effective) image processing sessions to those who address astroimage processing as if their lives depended on it - well, almost :smiley:

The cover (subject to change):

It's being a monumental work but I'm very excited about how it's shaping. I'm working on it this morning in fact!

General / Re: No colour after a simple processing
« Last post by STEVE333 on Today at 13:46 »
Hi Fred - One suggestion for when you are using STF. In the upper Left corner of the STF process there is a "chain" icon for Linking/Unlinking the RGB channels. If you make sure that icon is NOT selected, the STF will try to do color-balancing when stretching the displayed image. This is usually a much more accurate indication of the colors in your final processed image.

General / Re: Sharpening with MLT and deconvolution feedback
« Last post by STEVE333 on Today at 13:35 »
Just a clarification.

When I said I tried the PSFImage script on a Linear image both with/without the STF applied, that was NOT referring to actually stretching the image, only using the STF to view the image on screen so that the stars could be seen.

General / Re: Win 7 to linux
« Last post by msmythers on Today at 11:36 »
From the PixInsight F.A.Q.

2.5 Must I buy several licenses to use PixInsight on Windows, macOS, Linux and FreeBSD?
Absolutely not. The commercial license gives you the right to use PixInsight on all supported platforms and operating systems. This currently includes FreeBSD, Linux, macOS, and Windows.

 2.6 Do you impose restrictions on the number of installations per license?
Absolutely not. Our commercial users have the right to install and use PixInsight on any computer they own. The only limit is that only the licensed users have the right to use their copies of PixInsight. Other than the fact that a commercial licensee cannot share his/her copy of our software, we impose no restrictions.

General / Windows 8.1 and PixInsight Incompatibility
« Last post by BobinBend on Today at 11:29 »
I have a MS Surface Pro 3 running Windows 8.1 and frequently get PixInsight Qt5Widgets.dll crashes. I've been told that PixInsight is not tested against Windows 8.1 but works well with Windows 10. So I'm looking into purchase Windows 10 to run on my Surface Pro 3.

There seem to be multiple versions of Windows including (1) Windows 10 Home, (2) Windows 10 Pro, and (3) Windows 10 S. Before taking a cost hit can anyone recommend which Windows 10 version will work with my MS Surface Pro 3 and will be compatible with PixInsight?

Thanks in advance for your help.
General / Win 7 to linux
« Last post by tloebl on Today at 11:19 »

I am in the process of porting over to Linux Mint from Windows 7 and wonder if I can run on both pcs or if I have to uninstall one.

General / Re: Sharpening with MLT and deconvolution feedback
« Last post by STEVE333 on 2019 March 20 21:44:03 »
Josh -

Deconvolution should always be run on the data while it is still Linear (no stretching). Therefore, the PSF needs to be for the stars in the Linear data. DO NOT STRETCH THE DATA BEFORE RUNNING THE PSFImage SCRIPT!!

I have used the script on Linear data without any problems so far, so, you shouldn't have a problem. I tried it on a Linear image both with/without the STF applied and it didn't make any difference. Worked both ways.

General / Re: Sharpening with MLT and deconvolution feedback
« Last post by gamempire on 2019 March 20 21:03:33 »
One more question for you or Rob: When building the external PSF for the stars, should I build a new one for each filter of the narrowband image, or can I safely get away with using the one I built from the Ha data?


Josh - For my images there can be quite a difference in the star sizes in the R/G/B channels so I need to generate a separate PSF image for each channel. Your situation may vary.

However, there is a new script that automatically creates the PSF image for you which makes it very easy.

The script is located at:


Make sure the image you want (Ha, Oiii, etc.) is selected then open the script.
Using the default settings, click on Evaluate. When the Evaluation is done it will show a PSF graph and a picture of the PSF.
Click on Create and it will instantly create a PSF image.

Really easy to use and saves a lot of work.


Well isn't that script just dandy! Thanks for that tip as well Steve!

One more question: should I use the script on a nonlinear or linear image to generate the PSF? I saw advice going both ways, but was just curious on what you do.

Edit: So I ran the script on the nonlinear image with the default settings and got what appears to be a good PSF. But when I tried to run it on a linear image, that had its STF applied to the HistogramTransformation then stretched, it didn't detect any stars with the default settings.
I'm thinking about writing a script to replace haloed stars in one image with non-haloed stars in another image. The script would scan a star mask showing the halos, determine the center and perimeter of the circle to be replaced, and then pull the pixels from the source, scaling them to a best fit for the target. The source and target would be monochrome, linear fit images, star aligned on the same target for the same filter, but not necessarily integrated from the same number of images.

This would be extremely useful for dealing with CMOS cameras that produce halos when two different cameras, one with halos and one without, are used on the same target. The halos produced by one camera could be replaced with non-haloed stars from the second.

Is there already any script with anything similar for this type of operation?
Wish List / Re: Linear plane manual background extraction
« Last post by Ignacio on 2019 March 20 15:10:31 »
Interesting idea. I use first order background models a lot with ABE, but with the "limitation" that you don't get to pick directly the reference points, and sometimes is hard to capture the right background areas. I would rather have that built into ABE, than manual sliders. Or have DBE work with various order models, rather than splines.

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