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BlockHead
About
- Username
- BlockHead
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Comments
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HI Pschemek, 1. Technically no matter what you call them- they are subtracted from the light frame. So functionally it doesn't matter where you put them. BUT...in terms of what they *mean* - a Bias frame has two purposes. It can be used as a "dark" …
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Yes, exactly. You could make a masterlight from the frames that are less impacted and then use one of several techniques (substitution or normalization (NSG)) to minimize the issue in real masterlight. However, this less impacted masterlight would s…
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Hmmm... I am sorry, I do not have an answer for this. It does sound like a graphics issue.The official PI forum is likely the best place to get relief. (if you have another computer.. you might want to try and convince yourself it is machine specifi…
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Hi Richard, I did get into the habit of putting a "Published Date" on most videos over the past few years.Please look for that text. Going forward... Courses that I make will have a Published date- and all of the videos under them will be "locked i…
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Hi Daniel, You can see it also at the top left. It is an arc of scattered light that goes through your field. This means there is a cylindrical surface creating this. It could be from a shiny tube/adapter or it could be a result of not quite perfect…
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Let me check it out...(you need to change permission to anyone that has the link..)-the BLockhead
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What you are describing is what I might call a dither- albeit large. Well.. we know that AlignByCoordinates works. Really all you need/want is the working mode of AlignByCoordinates to be Union (Mosaic).This is available as you know in StarAlignmen…
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I just don't understand how NGC 1514 (a PNe) can be a 10 frame mosaic...NGC 1514 is 2+ arcminutes.JWST FOV is 3 arcminutes.
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Yeah..it might.
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I did write you an e-mail:Yes, I think you need to combine the ideas behind a few of my videos. Stretch the image, likely the starless image, to bring out the IFN. Don't over do it. Do it incrementally... it is OK for the galaxies to become nearly …
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JWST comes with a solution already in the data. NGC 1514 is in multiple images? So JWST does not specify the coordinate origins (or flip/mirror) as part of the solutions..they need to be the same. MbC is the correct tool if the coordinate systems …
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A couple of comments... 1. BXT early on needs to be done with care. Since you are doing LRGB...it is more important to do it to the RGB component..but not the L early. 2. BXT can now be used to operate on high or low frequency as well as luminance o…
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Got it... sorry.So... this isn't about poor quality data... not at all.This is all about choices. I agree with both parts of "To me its all a bit overcooked, maybe i should be more cautious with processing (or accept i cannot pull out of the data w…
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The Luminance looks good to me.So... please make links to some screenshots that show where you are ...and what you think needs to be "improved." -the Blockhead
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I get it. You might not like this answer though- The reason I seem to know more isn't because of some magic stuff or skill... it just comes from practice. Now, when I practice (process different images over and over) I do pay attention to patterns. …
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I did have examples that start from data that is perhaps more challenging because of light pollution, lack of exposure time and so on. Here is the thing, members wrote back to me. They said that they did not want to see all of the extra information…
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What exactly does not work? I think there may have been an old example that I demonstrate...but this is likely no longer available. Can you please indicate step by step what you are doing and where there is an issue? -the Blockhead
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I think just looking at the values as you are doing is good enough. I don't think image statistics will necessarily provide more information for these purposes. It is enough to know your calibration frames and light frames do not match. The calibra…
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Wes, Please look at the values of your masterdark compared to your masterbias.They are incompatible. Your masterdark has values of 0.0000xxxx whereas your masterbias (which should be equal to or maybe a tiny bit less than this) have values of 0.015…
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Sorry I forgot to mention this.. you also need to set that link you created/copied to have permissions for "anyone that has the link" . I do not have permission currently to see your files. You need to adjust the permissions for that link. I demon…