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BlockHead
About
- Username
- BlockHead
- Joined
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Comments
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Hi Jean-Francois, I would like to make a series of videos on how to approach solving issues like this. I think there is a standard approach to doing so that will be helpful to people. Can you make your raw data available to me? I don't know if a sub…
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Marsha, The way to do this is to measure your frames with SubFrameSelector. It shows you the weights of each image (each type of method). You can also output these values to a CSV file and make your own graphs as I did in my weighting videos (I hope…
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NB ColorMapper (behind the scenes) uses screen blending to make the color images. In that sense, there is a similarity. But I think that is it. ImageBlend it a more general tool that offers the complete standard set of blending operations with the a…
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Excellent!!Stars look great... color detail good as well. -the Blockhead
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Why is your scaling Multiplicative with Scaling??Why do you have no normalization for the Pixel Rejection??-the Blockhead
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I saw the frames.. They do not.So, when I integrated them I get the expected result. There are no black anythings in the result.
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Wait... does the original raw data have the black spots?(This is a common effect for certain kinds of CCD cameras... )-the Blockhead
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Hi Hans, Setting aside the Trian Ultra Quad...etc This video is in Horizons:https://www.adamblockstudios.com/articles/spcc-narrow-band-mode (I cannot put everything in Fundamentals...NB is a specialization of image processing) In it I explain that …
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Ah... this is good news.Lately I have been striking out quite a bit! lol-the Blockhead
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Well.. .first it is possible to Drizzle at 1x so there would not be a change of scale in this case.You are correct that Drizzle at 2x will change the plate scale. It effectively doubles your focal length or halves your pixel size (which halves the a…
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No... but you need to take enough to get a good sky brightness and also so when you combine the images all of the stars will be rejected. So take like 50 or more frames.If your sky is very bright... even 120 seconds would be fine. -the Blockhead
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Night sky flats require no clouds. -the Blockhead
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So I suggest you attempt some night sky flats...You should confirm these work... and work backwards from there.-the Blockhead
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Hi Edoardo, In Horizons I have a video on Night Sky Flats that might be helpful to you. You do not have Horizons though... I did make this information available through my Patreon account. This is the video:https://www.adamblockstudios.com/articles…
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Yeah... it just isn't possible to go back and re-record for every change. I rely on the viewers (and my own judgement) to know when a video is so stale it really isn't useful. In this case, I think it is still OK without having to re-record. I will …
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Hi Mark, 1. You should use the search tool on my site. Did you try it? It is at the top right of the page next to the login/logout button. Typing MLT will certainly show you some videos. Google should also work. 2. MLT and LHE are two very differen…
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Hi Don, In PixInsight you need to make a linear image a non-linear (permanently stretched) image. Then you save it as a TIFF image at 16-bits. So the answer to your question is with the understanding of the STF and HistogramTransformation. This is …
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Hmmm... It reminds me of microlensing a little bit. I do not know what the surface of that sensor is like...but my guess would be it is from the sensor. Note it is not aligned with your diffraction spikes. An interesting test would be to slightly r…
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Well..the tool actually works like DBE but with AI placing the samples. As the AI gets better...it will indeed be a more generalized tool. This is my understanding anyway.I agree that for fields filled with nebulosity- it does not always give an opt…
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Rex, 1. I am REALLY trying to be clever here. You have neglected a possibility. What if SXT removes part of the comet nucleus? This is a common issue. if you first remove the stars... you cannot use a mask on the comet to save the nucleus because it…