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BlockHead
About
- Username
- BlockHead
- Joined
- Visits
- 257
- Last Active
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- Member, Administrator
Comments
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Some cameras (you didn't say what you are using... have a "traffic" control setting that minimizes noise when sending the data over cables. Many variables.-the Blockhead
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Thanks for addressing this Mike... I had hoped this might happen. :)-the Blockhead
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Not the moment. This isn't an area of expertise for me right now.-the Blockhead
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When you are using a narrowband filter you are observing (letting through) only particular wavelengths of light. So when you look at the histogram of an image that shows each of these wavelengths (since you are using a triband filter) you will see t…
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I did explain it...but you should not take it seriously. There is the WBPP weighting formula (about Nebulae, Galaxies... etc). This is COMPLETELY obviated by SFS which is pretty much obviated by the new weighting schemes of PSF Signal Weight and PS…
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It isn't just a bandpass issue with the bayer filters...they generally have too great an overlap in transmission which leads to less color contrast. So that is one. Two, as you mention is the transmission efficiency of the filters... that hurts in a…
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Yes, I see it.The first question I have...is if you are using a Pedestal (as likely you should be).This is always the question for NB images... -the Blockhead
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I swear I demonstrated this with some TL data recently and made a video on it. Reggie... you should look at the set of videos that come up when you search for plate solution or image solver. I make too many videos...too many questions. lol The main …
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There are some "clever" and more importantly complicated ways you can attempt to effectively create halos of a give size from the stars themselves and subtract the halos away. This is the Fabian Neyer technique...but it is ALOT of work. So at the e…
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One of the problems I see here is that you are using GAIA DR2 which is not complete...nothing like the new GAIA files. So you are putting yourself behind the eight ball and expecting to pocket the nine and win the game. I know you might think it cra…
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Hi Rafael, The sky brightness is changing every second- so the light levels will be changing for each picture. For some filters where the exposure time is shorter- that change in light level may not be as obvious...but it is there. Having flats at …
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Sorry...I did get a little lost.You said you want to "multiply the two images.." I am not certain which two images are you talking about. But...I can say that the flatted flats are not going to be useful in any form.A flatted flat is very nearly one…
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Great.Sorry I was unable to reply to this. I was out of the country.-the Blockhead
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Hi Joseph, Please check out the text above any videos. I will offer summary information as well as any hiccup info you need to know in advance (like this example). -the Blockhead
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Well... it is complicated. First I would likely just compare subframes- or a very small group of the best subframes from each.By looking at the integrated images you are mixing the relative image qualities. Even better, perhaps... Put all of the fra…
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Hi Bryan, I understand that there is confusion. However, I have to say that one issue is that people do not want to see perfect data all the time- and this is precisely the danger of using imperfect data where you need to do other things which make …
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Excellent!-the Blockhead
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There are a number of ways of doing it- but typically you will use channel combination, pixel math, or a whole host of scripts that mix this for you. For example you can use the NBColourMapper script that Mike Cranfield and I worked on which will al…
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Well.. there are more visual ways of going about doing it:https://www.adamblockstudios.com/articles/continuum-subtraction-using-nb-colourmapper-script Remember, you can search for a word like "continuum" on my site and it will show you related video…
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Hmmm... I don't think there is a clear cut question/answer. Really I suggest to look at the videos as a set of knowledge. There are ideas and demonstrations I show in older videos that are 100% valid. Other aspects of the software or techniques do a…