Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - frasax

Pages: [1] 2 3

i thought about english subtitles, but i assume that would be much more work then just record it in english.

CS Frank

General / Re: Widespan Milkyway Mosaic?
« on: 2019 February 05 08:24:24 »
Hi Juan,

thanks for replying, thats good news! Maybe you need some Data for Betatesting?
CS Frank

General / Widespan Milkyway Mosaic?
« on: 2019 February 05 06:29:19 »

i´ve captured a pretty Milkyway Mosaic last year, spanning from Aquila to Musca with the Galactic Center in Centerposition. I did this with a 24mm Lens on a Canon6D.
I thought processing would be easy, but i gave up on it. I can match together two panels of it but no way to match al 4 panels. It seems like the distortion is just to strong.

Are there any recommendations or tricks out there ? I would love to hear.

Thanks in Advance


i did a YouTube Series with what i call my standard workflow. Its only in German yet, but maybe i will do it in english as well.

The Series covers a whole Workflow from beginning to End, covering the following tasks:
-image inspection with blink module
-batchpreprocessing script for calibrating ccd and dslr data
-star align and image integration
-DBE and ABE
-noise reduction with MLT
-colorsaturatin and colorcalibration
-stretching with HT and Maskedstretch
-final processing and tweaking
-image formats and sizes

further i plan to add more advanced videos and maybe english versions.

CS Frank

General / Photometric Normalization
« on: 2019 January 28 07:58:49 »

i´d like to compare two images based on their photometric values and normalize them to each other. A broadband red filtered image to a narrowband Ha filtered image.
I think a photometric nomalization is part of the photometric color corrrection, but i have no clue how to interfere into that process to get out what i need?

Anybody any Ideas how the job can be done in PI? Again, the goal ist to have comparable photometric brightness in a broadband and narrowband filtered image.

Thank You


i´ve compared different stretching Methods in PixInsight and noticed, that Automatic Histogram (which i like, cause it gives me tighter Stars) leads to a color shift towards Blue and Green (or less Red so to say) in my case.
Is there an explanation for that, am i doing something wrong with it?
As i always do a Color Correction (PCC in this case) i´d like to have the Colors untouched from that point on.


General / Re: optimized image subtraction
« on: 2017 May 09 12:12:30 »
Hi Carlos,

what could Linear Fit do? Leveling the Background or the Signal? It can´t level out the Starsize i guess.

CS Frank

General / optimized image subtraction
« on: 2017 May 09 10:41:45 »

i´d like to subtract two images but don´t want to simply use pixelmath. Both images should first of all be adjust to get the same stars FWHM, the same Signal Levels and Background Levels. So in the End there should be no Artifacts from not matching stars, or negativ values, because of mismatch of signals.
Does anyone have an idea, how can i reach that goal without just try and error (which works, but i´d like to optimize this)?

CS Frank

General / Purple and cyan Stars DSLR
« on: 2017 February 22 13:56:50 »

i´ve processed my first image completely in PixInsight. Its a 2hours Image of the Milkyway with a Canon 6D and a 24mm Lens.
In the final image you can see that most of the bright stars are purple or do have purple centers, while dim stars have a cyan color cast (see attached crop).

Here is what i did:

BatchProcessing (against all recommendations) of Flats, Bias and Lights
Linear Fit to Green
Background Neutralization
SCNR remove green
Masked Strech

Do you have any ideas if i did something wrong here, or how i could avoid this.

CS Frank

General / Re: Theli an PI Channel Combination
« on: 2017 February 14 06:58:51 »
Hola Juan,

its all cool now, thanks for your answer.

CS Frank

General / Re: Theli an PI Channel Combination
« on: 2017 February 14 05:39:11 »
Hello Thomas, Hello Juan,

i´ve slept about what you wrote, and i will give some answers.

I see now, that my first Posting was very unlucky, because my formulation sounds like i´m blaming PI for working wrong, but it is not.

Many apologies for that, that was totally not my Intention. My words werent choosen well, and from that perspective i can understand parts of Juans reaction.
I´d rather should have asked why my data is differently treat by different softwares. And i´m sure the answer is interesting not only for me, beside the fact that i use Theli or not.

In my earlier postings i´ve also said, that i really like PI and have full respect for its developer. I´ve used PixInsight already way back, when it was called PI LE. I´ve buyed my Core License a couple of years ago, but never worked seriously with it, until now. I´ve watched hundreds of Videos, buyed Warrens Book and i´m really curious about the Software Package. Also my latest pictures were partly processed in PI, and i´m very Happy with that. So, to say it clear again: I´m a Fan of your Software.

What i didn´t liked was the way Juan reacted. Again, even from the perspective that i used totally wrong words, to describe my problem, Juans reaction was for me, very angry, almost personal and disrespectful. If someone uses phrases like "not my friend" over and over again, than i reply: Yes, and you are not my friend either.
Maybe Juan got things wrong, and maybe i got things wrong. Well it is like it is now.

For me two things are important:

1. i like to choose whatever software i use by myself. I don´t need to tell someone the reasons why i use specific software. It is my personal choice and no one elses. If you´d ask me, i will tell you the reasons, but still this is only my business. Especially because it is just my Hobby.

2. Someone elses buisness is not my business, because i have to pay my biils and run my own business. So we all have to carry our packet.

@Thomas: Yes i agree, my initial posting was not based on knowledge and facts. As i said above this is a big misunderstanding, and i´ve caused that because my words werent choosen wisely. BUT: Anyway i´m allowed to have no Knowledge:-) As Juan said, it´s just my Hobby. My Knowledge about Mathematics is just OK to write my bills, my program language skills are not more than two command lines in Basic which i´ve learned as a Kid. I´m not an astronomer and i´m not a Software Developer. Yet i´m allowed to work with this softwares and expect an outcome. And based on the quality of this outcome i choose my tools to work with. That does not mean, that i don´t want to learn about whats going on, but i will never get the full knowledge, because i´m not an engineer.

When i´ve started digital Astrophotography in 2006 i´ve tried very fast different free to use Softwares, and i was not satisfied with the results. Thats why i´ve choosed Theli, way back when PIxInsight was still in its beginnings. Meanwhile PIxInsight became (quiet rightly) THE Standart for astronomical imageprocessing. And believe it or not, last week i´ve considered seriously to quit with Theli and start completly with PI. Two things holding me back, first of all i´m just used to my workflow, and i need to learn a new one. 2nd i´m missing at least two things in PI, one is the star catalog the other the B-V color calibration. But there are workarounds for both.

Concerning Theli, yes it is not up do date, and honestly i don´t know if it will become in the future. Mischa is busy with his Job and Family, and i think the Time for Theli is over. I´ve talked to some users and sooner or later they will all switch to PI.

Lots of Words and i could go on and on. I hope my point of view is somehow understandable.

CS Frank

General / Re: Theli an PI Channel Combination
« on: 2017 February 13 06:10:26 »
Never Mind Juan,

i will do so.

Have a nice day.

General / Re: Theli an PI Channel Combination
« on: 2017 February 12 06:40:56 »
Hi Thomas,

thank you very much for your answer. This explains everything.

CS Frank

General / Re: Theli an PI Channel Combination
« on: 2017 February 12 04:03:06 »
Regarding the initial posts in this thread, just a quick remainder of three important facts:

- This is PixInsight Forum, not a general astrophotography forum where you can talk freely of anything.

- This is professional software development: I need to sell licenses to pay the invoices. PixInsight exists and will exist exclusively if we can sell licenses; nobody helps us economically at all.

- Competing applications are not my friends. The developers of competing commercial applications are not my friends. The developers of competing freeware or open-source applications are not my friends. I respect them and I hope they'll respect me, but we are competing and will be competing. It would be nice if we'd collaborate, work together, share experiences, etc, but unfortunately this is not how things are.

There are thousands of hard work hours and lots of hope behind PixInsight and its tools. I understand that this is a hobby for you, and that's great, I hope PixInsight will help you to enjoy it much more. But please understand that I am not here to enjoy hearing how you prefer using other software applications instead of PixInsight, especially when they offer nothing more or better than PixInsight. Please respect my work and the work of other developers that have created and create PixInsight, that's all I ask for.

Hi Juan,

My (our) Problem is not e general Problem of Astrophotography, it´s a problem that is specific in PI. So i thought it´s the best to ask this question here.

I respect the fact that you need to sell licenses. Guess what, i´ve buyed one, telling everyone what a great peace of Software PI is. And you are getting personal on the fact, that i also use other softwares?

I´m not into Software Development so i can´t say anything about competition between developers. A fact is: Theli was never written for Amateurastrophotographers. It was supposed to used by professionals who either way use the professional softwares which are implemented in Theli (Astromatics Tools). So no competition at all! Just a bunch of people from Austria and Germany tried working with Theli a couple of years ago, and some did succesfully while many failed. When PI Core came out almost everyone of those guys switched over to PI! PI destroyed a vivid Community of a minority of astrophotographers. Some of them are giving PI workshops today:-) So come on what is your problem? I did a Workshop about Theli at CEDIC in 2013. 15 people sitting there. A day later Vicent did a PI Workshop with 150 people. Still not satisfied?

The Author of Theli is a nice guy. You want some collaboration? Did you ever asked him?

As far as i know,most of the PI user will also work with Photoshop. You don´t like to hear this either? Well then you have a lot of work to do.
Concerning Theli: Just offer some B-V Calibration and a registration based on Star Catalogs and i´m yours! :-)

Back to topic:

I do have three color channels, already background substracted and Color Calibrated. All i need is to combine them in a 1:1:1 ratio. That works in all other softwares except for PI. Who, if not you could help us with this problem? I suspect the FITS Format, and so do you. If you do don´t want to investigate on this because you don´t like me, fine:-) But i hope you jump over your own shadow.

CS Frank

General / Re: Theli an PI Channel Combination
« on: 2017 February 11 17:20:46 »

Could you please upload the color image you generate in PixInsight?


Hi Vicent,

i will, but not before Monday, as i´m not at Home.

Just a suggestion: I suspect the Format Settings more, than the Algorithm of the Channel Combination Module. What about the Override Embedded Settings? Like ICC Profile for example?

CS Frank

Pages: [1] 2 3