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BlockHead
About
- Username
- BlockHead
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Comments
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Personally... I think what would be better than the buttons would be an "h" wheel or geometric form (it might not be a circle) that labels the h values. Then you could simply look at the image to input a desired range. Given what we know now... do …
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Hi Andrew, Great summary! Think the issue that people are running into (which I did not appreciate myself) is that by working in h space, the BUTTONS need to refer to h as well. But as Sedat found out... they do not! If you press the red button... y…
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I agree with you!!There is a shift of 60 degrees or something between h and H.Here is the thing... Color Mask appears to work in h space as you say... but the Buttons seem to describe H space. At the moment...until I look into it more... I think Ric…
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Oooh... I have never thought that a good idea. DBE is a model that truly changes values of an image (in each of the color channels). This is a effectively a non-linear adjustment- which I would not want to perform before color calibration. When I id…
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That is great news!!Sometimes I come to this forum with a little anxiety... usually something not working- it is always great when something goes well!-the Blockhead
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Good technique Chris. -the Blockhead
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I decided to do something different. Instead of uploading a defect map image... how about just generate it with Pixel Math. Here is the expression: ***Bin 2x2***x = x(); iif(x == 119 || x == 190 || x == 468 || x == 736 || x == 794 || x == 819 || x =…
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I usually do turn it on...but it isn't terrible critical to be honest. (You should try and compare- keep all the other parameters constant..and do a mask with Aggregate on..and one with it off. Blink the two versions. It is really more important to …
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Hmm... indeed that is true. You can make the defect map yourself (there are a handful of columns). If I had made the project file available instead of the RAW data, then you would get it.I will work on uploading the files to here: https://www.adambl…
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Yes, I guess I could.I think I do make the numbers (readnoise and gain) available in the video of course (which is what I think my logic was long ago for not including it... you will get the same answer I did). Do you think it is instructional? If …
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Hi Nicholas, You can add this feature once you are a member (instantly). Go under your account and add a new subscription. It is a one-time thing though.Please let me know if you have an issues. (as an admin of the site, I do not see this "My Accoun…
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The rings have too much structure for something like DBE to take care of. This really isn't the right tool. Unfortunately there really isn't a tool for this. If you actually succeed in getting rid of the green- the magenta will probably be an issue …
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*laugh* I will need to look back and see. Doing things "live" is fraught with troubles. I might add a note on the page that you found this error of mine. That is one thing I like about producing videos on a site like this...I can add some informatio…
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Hi Andy, I believe the option Subtract Pedestals only comes into effect IF you have a FITS Keyword "PEDESTAL" and it has a value. Some software programs that calibrate data (that you might get from a remote observatory... already calibrated) add a f…
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Hi Tony, That was not an oversight. (I mention this in my lesson on Image Integration). Local Normalization for purposes of Rejection is not a recommended method. It means the normalization- that is normally a global property of sky brightness (loca…
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You might be interested in seeing Tony's method: http://www.astronomy.com/magazine/tony-hallas/2013/06/the-most-colorful-stars I think only subscribers can see this?If you are not one... I will find another way.This will give you an idea as to the …
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Yes, white star cores is always the default. However, you might want to distinguish between stars that are truly saturated and those stars in your data that are not- but become white clipped as part of the brightening process. For example, do you si…
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When you are ready to upsample the image... use a bi-cubic interpolation... you will certainly get round stars. -the Blockhead
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Ok. Well first comment I would make..and this is a stylistic point- if you look at my "portfolio" of images- all of my stars have whitish cores. The colors tend to come from the halos and diffraction spikes. Unless the object itself is composed of s…
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Ah... well a number of things.First you certainly cannot compare any of the data I have been working with to these!! Narrowband stuff is extremely low signal stuff and not of the type of data I have been dealing with... *not* because it is superior …