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Svbony driver issues

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Replied by R Dan Nafe on topic Svbony driver issues

I am trying to capture FITS format images in 16-Bit-RGB, but they are coming in as 16-Bit monochrome.
4 months 3 weeks ago #100540

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Replied by tkakura on topic Svbony driver issues

Have you debayer your images?
The BAYERPAT in the FITS Header should be 'GRBG'.
You should be able to get a color image when you Debayer with this pattern.

I have checked all the FITS Header by running a sequence of RAW8, RAW16, Luma 8, RGB24, RAW16 one by one.
The first, second, and fifth images all had a BAYERPAT of 'GRBG'.
This means the images are in color.

Perhaps you should try attaching your FITS and Sequence files?
Last edit: 4 months 3 weeks ago by tkakura.
4 months 3 weeks ago #100541

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Replied by R Dan Nafe on topic Svbony driver issues


Rendering Error in layout Message/Item: array_keys(): Argument #1 ($array) must be of type array, null given. Please enable debug mode for more information.

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Replied by tkakura on topic Svbony driver issues

NAXIS = 2 is correct.
Fits that represent colors in Bayer structure are not a problem.
It is the normal way to color in image processing applications that can Debayer.

No problem for Kstars/Ekos/Indi.
4 months 3 weeks ago #100551

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Replied by tkakura on topic Svbony driver issues

A fits file with a Bayer structure stores the luminance transmitted through the 2-dimensional Bayer filter in cmos as it is in a 2-dimensional structure.
This is how fits are generated in an astrophotography application.

Next, the file is converted to RGB using the debayer operation in an image processing application.

For more details, please search the Internet.
4 months 3 weeks ago #100552

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Replied by R Dan Nafe on topic Svbony driver issues

So how do I coerce my SV405CC into producing 16 bit <strong>color images</strong> , within the KStars/Indi/Ekos eco-system?
Last edit: 4 months 3 weeks ago by R Dan Nafe.
4 months 3 weeks ago #100553
Attachments:

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Replied by Jasem Mutlaq on topic Svbony driver issues

Can you share a link to one of the FITS images?
4 months 3 weeks ago #100554

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Replied by R Dan Nafe on topic Svbony driver issues

Ok, I have found a way to do this:
Load all the Ekos produced FITS files into the "Conversion" tab of Siril
Use the "Convert" button, with the "Debayer" box checked to create new FITS files that have R,G, and B channels.
This method changes the FITS header from:

BITPIX = 16 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 4144 / length of data axis 1
NAXIS2 = 2822 / length of data axis 2

to:

SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 4144 / length of data axis 1
NAXIS2 = 2822 / length of data axis 2
NAXIS3 = 3 / length of z axis (mostly colors)
4 months 3 weeks ago #100555

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Replied by tkakura on topic Svbony driver issues

You don't have to debayer by yourself, I think it will be automatically debayered if you use a script that stacks multiple images in Siril.
I have never used Siri, so I don't know the details, but all well-known astronomical image processing applications such as PixInsight, DSS and Astro Pixel Processor will automatically debayer when stacking.

For more information, please visit the Siril forum.
4 months 3 weeks ago #100557

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Replied by R Dan Nafe on topic Svbony driver issues

Here is an example: drive.google.com/file/d/11NssYCMxaoCgud5.../view?usp=drive_link
4 months 3 weeks ago #100558

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Replied by R Dan Nafe on topic Svbony driver issues

Yeah, stacking in SIril debayer's the image.
4 months 3 weeks ago #100559

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Replied by R Dan Nafe on topic Svbony driver issues

Now I understand. As this is my first real Astrocamera, I did not know how the FITS files were different than those from my DSLR.
The following user(s) said Thank You: tkakura
4 months 3 weeks ago #100573

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