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BlockHead
About
- Username
- BlockHead
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Comments
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Increase of contrast in the color channel does result in an increase of saturation in the LRGB for a given stretch level. BUT it is far more important to show all color in the RGB at a reasonable level. If the color is not present in the faint and b…
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Hi Matt, If you still have the cached WBPP session... yes! You can add the new data. What should happen is that it will only do the preprocessing on the new data. (Calibration and stuff). When it gets to the point of ImageIntegration, WBPP should i…
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Just to follow up... please do watch my series on NGC 3486. In the more up-to-date version- I do not use ArcSin stretch and demonstrate a better result. (If you really have time..look at both versions of my processing... lots to learn there!) https:…
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I would be careful with ArcSinh stretch for color. You can use a tiny bit of it...but it does do some funky stuff. It is better, in my opinion, to just manage the blending of the L with the RGB image at an appropriate brightness and color saturation…
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I am not clear myself on the effectiveness of dual-band filters in front of OSC filters. Sorry, I do not have videos that cover this subject.-the Blockhead
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No... it isn't a header problem.Here is the issue. When you take files that have been processed in CCDStack- they become 32-bit float images. They are also not normalized between 0 and 1. That second part isn't the killer...it is the first part. Whe…
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Hi Matt, Once you have a sharpened luminance image you will want to stretch it and your RGB so that they match each other. Then you combine them back together with LRGBCombination. I have many videos which show how to use LRGBCombination. (just load…
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Hi Reggie, https://www.adamblockstudios.com/categories/m51 andhttps://www.adamblockstudios.com/categories/ngc6250 (super old, but it shows the basic premise of inserting Ha into both the L and R channels so it is colored well) -the Blockhead
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Hmm... well, you might want to rest on the couch again.When doing LRGB combination (with just the L field populated)- you will have a stretched image for L and a stretched RGB image. Hopefully you are not trying to do the four channel combo. Please…
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Bernard, I will tell exactly what is wrong. PixInsight tells you the answer as well in the console. Look at the coordinates for Declination.-40 28 60 This is not a possible coordinate. There is no such F@!IING thing as "60" .It is only -40 29 00 or…
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Hi Bernard, I will need more information. I do not understand what you mean by "will not read them" in terms of WBPP. Can you show some screenshots...errors or make the files available?? -the Blockhead
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Well.... that is quite a question... There are two methods (actually three.... but you will not like the third). 1. You are using a refractor. So you can introduce diffraction artifacts by crossing two strings (black thread work very well) in front …
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Here is the deal, unless you have an amp glow or some other kind of electronic signature that is an issue- just take Bias frames and use them to calibrate all of your flat field images (which might be of varying times). This is the normal way. The r…
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It depends on the data.... but that seems much.My guess is that you might need to adjust the relationship between your color image and your luminance. One, the other, or both could be too bright.If you have watched my videos on this subject closely,…
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Hi Rick, Please watch my latest video in which I announce Stretch Academy on YouTube. I explain this exact behavior at around minute 10... but I would reccommend watching the entire video: The answer is that with a color image you are transferrin…
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Yes...if the Linear FIt is good... putting the Lum in each of the channels should work. The nebula will be the correct color roughly. The stars...probably not since their will be a single scaling factor computed. It is worth a shot. -the Blockhead
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Hi Matt, There are two parts to the answer. 1. Does the image in question represent a small number of the total number of frames? Do you have many better quality images? If so, you can safely leave the frame in. Rejection and weighting will properly…
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Hi Bill, Well... it appears then that ultimately this is a flat fielding issue with respect to the donuts. It might be possible to use a correct technique that I demonstrate where you have one channel where the information is "good." If we assume t…
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Reg, Not in the way I imagine you are considering. (I could be wrong of course...)The GAIA colors are derived from spectra... not color indices. I think you are thinking you would to compare/know a color index of a particular star. -the Blockhead
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That same article uses one of my images as well. 1. HDRMT is the best tool for managing the core of globular star clusters. This is a tool that takes some understanding and practice to use. HDMRT is even easier to use on the core of M31. But still..…