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ZWO ASI294MC-Pro in hi-res mode gives only monochrome

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#1 audioengr

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Posted 22 October 2020 - 04:31 PM

I used SharpCap last night to get color images of M33.  I took flats and darks at 2 minute exposure.  I set the camera mode to 16-bit for the first time, which selects 14-bit mode.  The captures I find this morning are all monochrome, not color. There is also a tiny grid pattern on the low-level details in the photo.

 

I am testing this by capturing terrestrial images today with SharpCap with no flats or darks and they are in color on the screen, but when I take a "snapshot" and look at the PNG or TIF file, it's monochrome and has the grid pattern in the lighter areas.  I think I have tried all of the settings on the right hand side and nothing changes it to color.

 

I recently did a sensor analysis for this camera.  Could it be that went awry somehow?

 

Prior to doing the sensor analysis, I was getting color images using 10-bit mode.

 

Also, when I take flats, it asks whether I want a monochrome flat frame.  Should this be checked for a color camera?

 

Also asks "capture and subtract bias frames" - should I check this one?


Edited by audioengr, 22 October 2020 - 04:36 PM.


#2 John Rogers

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Posted 22 October 2020 - 04:40 PM

I used SharpCap last night to get color images of M33.  I took flats and darks at 2 minute exposure.  I set the camera mode to 16-bit for the first time, which selects 14-bit mode.  The captures I find this morning are all monochrome, not color. There is also a tiny grid pattern on the low-level details in the photo.

 

 

I believe that SharpCap is saving the files in a raw format, so the colors are contained in separate layers.  You need to open the file with a program that will "debayer" the image correctly.


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#3 audioengr

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Posted 22 October 2020 - 04:59 PM

I believe that SharpCap is saving the files in a raw format, so the colors are contained in separate layers.  You need to open the file with a program that will "debayer" the image correctly.

Okay.  Looks like Autostakkert debayers it automatically when you have lots of subs.  Since I am only trying to debayer a single frame, I need to use something else.  Thanks.



#4 BinoGuy

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Posted 22 October 2020 - 06:50 PM

Try Siril, it can debated single frames.

 

 

Clear skies,  BG. {°¿°}




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