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Messages - STAstro

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31
Wish List / GPU Utilization
« on: 2018 February 20 07:59:06 »
Haven't come across a thread suggesting this, so forgive me if there is one.

With GPU's having a lot more cores/resources is there a plan to offload some functions like DrizzleIntegration which are pretty...let's face it...intense tasks for even the later CPUs, especially with Camera sizes getting bigger also, it makes sense to leverage the GPU, or have an option to leverage the GPU

32
Just completed my BIAS to SuperBIAS

Went through the process of:

1. Creating 251 BIAS Frames
2. Integrating them to a MasterBIAS Frame
3. Creating a SuperBIAS based on Columns
4. Used PixelMath with the following MasterBIAS_251_Frames - superbias_h + 0.1
5. The resulting frame then had a SuperBIAS applied to it using Rows
6. A Pixelmath was then applied using superbias_v + superbias_h - 0.1

Resulting in a SuperBIAS Frame with horizonatal and vertical BIAS corrected, here's the results, left is the MasterBIAS of 251 frames, right is the SuperBIAS, both had auto STF applied

33
But if all my dark masters are the same exposure and temperature of my lights then the "Scaling" and "Optimizing" of the darks during Light integration is not neccesary right?  That's if I am reading correctly...lol

34
After reading that, I get

1. Do not Calibrate my Darks, just Integrate them as a MasterDark-Uncalibrated
2. Calibrate your Flats - With SuperBIAS (That post doesn't talk very much about flats), don't see the point in calibrating a dark with the Flats, correct me if I am wrong here, but the exposure is so small my lowest Dark Frame exposure is 90 seconds
3. During image integration do not select calibrate or optimise against the MasterDark and since I am using a Temperature Cooled Camera, I do not need to optimise the Darks, so therefore I do not need a SuperBIAS in the image calibration.  So I will just be calibrating against my Un-Calibrated Master Dark and my Calibrated Master Flat


35
So the tip here is to use "Uncalibrated" Darks and Flats and just chose the option during the ImageCalibration

Pitty the Pre-Process script doesn't have the option of calibrating them :(

36
Thanks Rob

I have been using this guide for my SuperBIAS and Master Darks, and it talks about creating the Calibrated Master Darks in there, so I do that part

However when it talks about generating the master flat, it is refering to calibrating them with a SuperBias as well as a Master Dark, which I find a little odd considring my flat frames are all below 3 seconds (Including Narrowband)

"As with the master dark, before we proceed with stacking the flat frames, we need to calibrate them individually with the master superbias and the master dark. To do this, we return to the ImageCalibration process. To avoid confusion, we can click the Reset button to reset the process back to defaults. "

Hence my post, this is where I am confused, I thought that if you do not take BIAS frames you need to do dark flats at the same exposure length of your flats, but if you take BIAS frames you should not need to do dark flats....now you see where the confusion comes from?

37
Thanks Rob

Yes my Master Darks don't need to be scaled as they're all done at the same exposure length and temperature as the light frames.  So if I hear you

1. Subtract the SuperBIAS from Flats during Flats Calibration and then Combine Master Flat(s)
2. Subtract the SuperBIAS from Darks during Darks Calibration and then Combine to Master Dark(s)
3. Subtract the SuperBIAS, Master Darks and Master Flats during Light Calibration and then combine Light(s)

Correct?

Simon

38
General / Re: How to disable thumbnail opening?
« on: 2018 February 12 14:33:20 »
You can do this in Global Preferences under File I/O Settings, as well as when you save the file there's an option to generate the thumbnail

See attached

Regards
Simon

39
Hi All

I am reading a lot of contradictory posts on here as well as the PixInsight Tutorials.

I am using the QHY183M Camera, and I am just building my Darks, Bias and Flats, I have created my SuperBIAS already.

Now I know I have to apply the Super BIAS to my Dark Frames before Integration to create my Master Darks, however for the flats, since my exposure for flats are all below 2 seconds, do I really need to subtract darks from my flats?  Surely I just subtract the SuperBIAS from my flats no?

Also should all my masters be saved in 32Bit Floating?

Many thanks all
Simon

40
General / Re: BPP does not see my master flat frames
« on: 2017 March 27 07:13:08 »
I had the same issue, I solved it by adding them as custom, but you had to enter the Filter detail in the same way it had for the light frames, this resulted in me identifying what was wrong with my flat masters in the first place

If your light frames are added as Red, Green, Blue and Lum but you "Custom" add with RED, GREEN, BLUE and LUM it will not match them as Red is not the same as RED!!!

I chekced all my Masters and they are all in Capitals, changing the headers to match the case of the light frames worked, I worked this out because it did not have any issues with my HA Lights and Flats.

Maybe the script can be changed to not be case sensitive?

41
Bug Reports / Re: Network error: HTTP response code = 302
« on: 2017 March 26 15:14:05 »
Thanks Juan

42
Bug Reports / Re: Network error: HTTP response code = 302
« on: 2017 March 26 12:05:25 »
I just purchased the full commercial license and I am unable to activate the software on my PC and my MAC, same HTTP 302 error

43
New Scripts and Modules / Re: New script: ColorMask
« on: 2017 January 13 02:04:22 »
Is there an updated tutorial, I have installed 0.7 and I do not have options for things like "Curvature Mask" etc, and I have noticed, if I click on Magenta for example, and I then click on the "Start Hue" box to enter a value, it automatically selects "Red" again

Simon

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