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BlockHead
About
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- BlockHead
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Comments
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Yes, sorry I am doing this piecemeal. I haven't made it entirely live yet for separate purchase. I likely will do this VERY shortly. I haven't even announced this yet to the regular PI Horizon members! (Although it is available to them now.) Thanks…
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I hadn't given it much thought. It was my understanding that because I was working on small scales (like the smallest to remove the 1st layer)- I didn't think there would be a difference. According to the rollover information, it appears it matters …
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Hi Wayne, Typically the answer is "yes" in terms of making a grayscale image to operate on . It does depend somewhat on the image itself- so there isn't a general answer really. Certainly if you have the signal for deconvolution and other strong con…
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Hi Tony, My quick answer is ... I don't know. Sorry!I suspect that the issue deals with the fact that the player is embedded in the browser... but I am not certain even if you played in another piece of software that the full screen view issue would…
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Hi Wayne, You will want to save master calibration files physically to your disk as *.xisf files. Then when you use BPP (for example), you can select and use them. I have a directory on my computer that just has the biases and darks. so I just go to…
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Yes, I mention the hue shift in the lesson. At this point, I have been treating ArcSinhStretch as a method for getting color in faint objects (or areas). All of its drawbacks relate to already bright things. In terms of a Hue Shift...I would basical…
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Hi Edwin, I will be including projects in the near future. The star removal section unfortunately isn't a good example... but there will be others that I will. Thanks,-the Blockhead
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Hi Wayne, This topic recently came up in another thread. If your stars are already 1-2 pixels in size- deconvolution as a sharpening method isn't going to really be very helpful. There are other sharpening/contrast adjustments that can do more of th…
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Ah..I see.The condition is that you want values to be less than 200 in terms of a bitmap value in order to more easily color those structures. However, if your object doesn't have anything bright- it is easier! You can just make certain to brighten …
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Hi Alan, If you are talking about the Normalization process- you can either let CCDStack do the job by choosing "Auto" on the whole image. Alternatively, you can pick a star or pair of stars. You will want to have counts on the order of 3000+ but le…
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OK! Wow... I found this useful chart: http://blog.astrofotky.cz/pavelpech/files/2013/03/QE_PBernhard.jpg Your chip is significantly less sensitive in the red... but I am still struggling to see an RGB ratio like you describe. If you get a chance..i…
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ArcsinhStretch is very powerful. The stretch it is doing will mess with the luminance profile (of the color image) and this can cause blending issues. There are some techniques for dealing with the effects of this process- but indeed you need to be…
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By the way Alan... the repair of columns and things is actually easier in PI. Something to consider.I have a section on Defect Map that you will probably like.-the Blockhead
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Wow... that is a really odd result for the RED filter. Can you please tell me the filters and camera you are using? I cannot think of a filter/camera combination that would yield such insensitivity in Red! To answer your question, but I can't wrap…
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Mark, I head you. If I had MORE time, I could probably create different kinds of content to help. Quick reference guides and other things. . Concerning OSC... yes, once you debayer into RGB images... the workflow is pretty much the same. You would o…
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Hi Mark, When you download the file you should have something called "Process_Icons_used_in_workflow.xpsm "Once you have this file in PixInsight you right click on the desktop and under the section called Process Icons you "Load Process Icons." Sele…
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Oh... I think you are referring to the "Zoom" level. 1:1 is the fully zoomed in. 1:2 is an image that is being displayed at 50%... 1:3 is 33%... If you have a mouse with a roller wheel- you can zoom in and out and watch the ratios change. Good catc…
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Hi Edwin, Thank you for the suggestion. There are some basic artistic considerations that apply generally- but are very useful for creating the "appearance" of resolution. Deconvolution on its own is usually something that is subtle and only appreci…
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That is correct! That is what I have been doing (I think I show this in my workflow section.)I usually fiddle with things and then when I am happy I actually apply DBE to the target image. This way everything is in the history state and my view has …
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Hi Alan, The smaller the tolerance the fewer samples you will get when there are larger variations in your data. This parameter in combination with the minimum sample weight will ultimately determine the number of little boxes you get! Of course th…