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BlockHead
About
- Username
- BlockHead
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Comments
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Mark, Currently MosaicByCoordinates has a bug... needs to be fixed. Just FYI. -the Blockhead
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Are you using Winsorized Sigma Clipping?GESD is harder to get to work... -the Blockhead
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Hmm... I do not know.I am currently creating a video on another Mosiac example (literally right now). So I will need to get to that point and see for myself. It sounds like the script is looking for a view that doesn't exist on your desktop. -the B…
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Yeah, you would need to do it in two steps... you couldn't use WBPP from the beginning in one go. My suggestion is to do everything in WBPP except ImageIntegration. This is the part you will need to do your selective rejection on the images... and t…
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I am making the video on this right now.You need to keep everything linear for Photometric Mosiac to do its things.You cannot do LRGB combination (which results in a non-linear image) and then SPCC. So you would make the linear RGB mosaic.Then make…
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Please let other people know... thanks-the Blockhead
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The only purpose for NB mode in SPCC is for the calibration of your data for purposes of astrophysical signal strengths in each filter. There are some people that want this capability for various reasons. But it is not the reason that the vast major…
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I am trying to maintain a collection of videos to help... as we go along. https://www.adamblockstudios.com/articles/new-pixinsight-release-1892 -the Blockhead
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Scattered light... yeah. It depends on how many subframes it occurs in.If a small number- then straight up rejection. (Selective Rejection)Selective Rejection:https://www.adamblockstudios.com/articles/new-selective-rejection-the-game-script-best-met…
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Yep, master flats are CALIBRATED images... no more calibration to be done that uses the biases.Great answer @Ray Hansen -the Blockhead
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Yeah, this is a John Murphy question.... It does appear to be memory related based on your description. John maintains a forum/thread on the official PI pages. I would suggest asking there. He does frequent here... but for whatever reason I can't g…
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I guess I am confused. When using Photometric Mosaic you build things up from pairs of images. So you have two images... use Mosaic by COords. Stitch together.Do this for another pair. Then put your two new panels together (using MosaicbyCoordinates…
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If you are talking about Subframe selector- if you have plenty of stars and things then perhaps the images do not need to be registered. However... I think registered images will give you more precise (better) answers. Just consider optical aberrati…
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I would recommend watching my instructional videos on SPCC.There is a distinction between color calibration (something you can do for both broadband and narrowband) and a white reference color balance (which is only broadband). So SPCC is removing …
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Yeah, I think there is something fundamental here that is not well understood.When you use SPCC you can color calibrate your narrowband data and find the true line strengths. But then what? All nebulae are brighter in Ha compared to SII... And OIII …
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Before we go down that road... Can you say why you want to use SPCC for this narrowband data in the first place?Is there something about SPCC and narrowband processing you think is mandatory or desirable? -the Blockhead
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Stretch Academy has its own page and list of videos: https://www.adamblockstudios.com/categories/stretch-academy Just go in order down the list. -the Blockhead
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There are a couple of different areas on this topic. My initial guess is based on this:https://pixinsight.com/forum/index.php?threads/drizzle-star-core-artefacts.14725/ Find Juan's answer on the first page. There was a suggestion this is an issue wi…
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Hi Stacey, Here is some information that will be helpful.Although you have two flats- I *think* you are using the same flat for each night. Correct?You have ONE ldas flat and ONE Lpro. Otherwise I would expect to see four flat field images in your F…
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In an ideal world you should be able to leave any weighted image in the stack and it will contribute for what it is worth and improve the SNR. However, there is a correlation between bad frames (poor quality/weights) and other kinds of issues (gradi…