I made two problems for myself:
1. I didn't make my bias frames the same temperature as my lights, the lights are at -10c and the bias frames are at 0c. Darks are same temperature as lights. Is there anything I can do to compensate for this other than re-shoot the bias frames? I use the bias frames to calibrate flats, but only use darks and flats to calibrate lights.
2. A few days ago I changed the filter name in the filename from "UV-IR" to "UV-IR Cut" and some of the frames have one or the other. Pixinsight's WBPP thinks they are different filters and will output them as 2 masters (OSC) rather than just one. What's the best way to combine these 2 unstretched, integrated calibrated masters? The PI Light Integration process requires 3, not 2 images, so I guess I could merely duplicate one, but is there a better way to combine these 2 masters?
Thanks,
Jerry
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1. Temperature of bias frames will not make any difference. The exposure time is too short for thermal noise to contribute.
2. Go into the images that have the old filter name and edit the FITS header values to match the new name
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Thanks David. Changing the FITS header manually for 160 fie names is too laborious. I think there's a better way..
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2. Average them together with PixelMath, don't need to do anything else.
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https://youtu.be/fuyI0_FHQmI?si=QuEw8j_LY6KlshnEAdam Bloch video on how to edit a batch of fits file headers.
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There are two batch scripts for PI that can edit multiple FIT headers at once to modify any part of the header but neither of them work. The first one is:=elementor-heading-title elementor-size-default BatchFITSKeywordEdit ( https://cosmicphotons.com/scripts/)I get an error message when I try to install it. The other one also won't open, ti's called BatchEditFITSSingleKeyword |
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andrea tasselli:
2. Average them together with PixelMath, don't need to do anything else. andrea tasselli:
2. Average them together with PixelMath, don't need to do anything else. When you say average them together do you mean "Image01+Image02"? I tried that with 2 different images and it doesn't seem to add them together..
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Jerry Gerber:
When you say average them together do you mean "Image01+Image02"?
I tried that with 2 different images and it doesn't seem to add them together.. Average means (Image01+Image02)*0.5. There is also a weighted average procedure which is: (Image01*TotalTimeImage01/TotalTime+Image01*TotalTimeImage02/TotalTime)
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You can rerun them through wbpp using the "add custom" tab to add one of the set of lights and change the filter name. I have had to do this multiple times. It will then combine them into one masterlight.
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Doug Crowe:
You can rerun them through wbpp using the "add custom" tab to add one of the set of lights and change the filter name. I have had to do this multiple times. It will then combine them into one masterlight. That sounds like the simplest approach, I'll try that.
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Doug Crowe:
You can rerun them through wbpp using the "add custom" tab to add one of the set of lights and change the filter name. I have had to do this multiple times. It will then combine them into one masterlight. Hi Doug, I'm not sure how to proceed with the "add custom" dialogue box. \ Do I put the original filter name I want to change (UV-IR)? Or do I put the new filter name I want to change it to (UV-IR Cut?)
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For me, I prefer to use “Custom” routinely.
It takes a minute longer, but eliminates little differences in datasets.
For “Add Custom “, I believe that you can call the filter anything you like (custom). It won’t matter as long as you do it for all lights.
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As Jim stated you can name your filter anything you want. I have had a few times where one set says filter "1" and the other set says "no filter". I just add the "no filter" set under custom and name the filter "1".
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If your image files are on a Windows machine, you can use "Power Rename" to change 160 files at once it will take you about a minute after downloading the tool. I use this all the time when I shoot on different nights with different plan names. It allows me to rename files and works great every time.
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If your image files are on a Windows machine, you can use "Power Rename" to change 160 files at once it will take you about a minute after downloading the tool. I use this all the time when I shoot on different nights with different plan names. It allows me to rename files and works great every time. Is "Power Rename" an app or utility?
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Will wbpp combine subs of different filter names if you just change the file name? Doesn't wbpp get the filter name or number from the fits header?
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I have found that PixInsight likes the filter names to all have the same number of characters. Otherwise you get an error message.
so H, O, R, G, B etc. Not Ha, R, G, B….
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Bill Becher:
I have found that PixInsight likes the filter names to all have the same number of characters. Otherwise you get an error message.
so H, O, R, G, B etc. Not Ha, R, G, B.... deleted.
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Bill Becher:
I have found that PixInsight likes the filter names to all have the same number of characters. Otherwise you get an error message.
so H, O, R, G, B etc. Not Ha, R, G, B.... Are you sure about that? I've been using filter names that don't have the exact same number of characters, such as UV-IR and Ha-Oiii and Sii-Oiii and have not had a problem. Maybe something else is going on?
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Hmmm, good point about the filter name being pulled from the FITS header, honestly, I am not sure. I will say Power Rename is a great tool for changing bulk file names if that is ever needed. I would test the Filter renaming and see what happens, worst case you are back to bulk changing the FITS header.
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