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Messages - pfile

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1
Release Information / Re: Latest version and MacOS
« on: 2019 May 15 14:14:45 »
yes juan said that 10.11 is not supported in the release notes...

rob

2
that's just how it works - the "namespace" for process icons is global across all workspaces. so every process icon in PI has to have a unique name.

rob

3
General / Re: Batch Preprocessing script - reference image
« on: 2019 May 15 09:18:29 »
i guess it depends on what you are doing. are you trying to register these images to your OSC images?

if not, you can just pick the image with the best FWHM/star count no matter what filter it came from. all images from all filters have to be registered to a single reference, so it kind of doesn't matter which filter's image you choose.

rob

4
use "merge process icons" the 2nd time. you'll get them on both workspaces.

rob

5
i don't think there has ever been a workshop sponsored directly by Pleiades. i could be wrong.

vicent peris has done a workshop from time to time, but i don't think these are in any "official" capacity.

lots of "3rd parties" give workshops and they are announced right here in this subforum...

rob




6
General / Re: HDR composition
« on: 2019 May 12 20:55:03 »
there's no reason why you can't do that... but i think you should analyze the masters first to see if there are saturated stars in the 300" master. if not, integrating everything together is fine. if there are saturated stars in the 300" master, then the HDRComposition tool would be useful. you need to pay attention to the masks it outputs to see if any data has actually been substituted from the shorter exposures into the final product.

rob

7
General / Re: Local Normalization help
« on: 2019 May 12 08:16:48 »
here is a single 1800s lum exposure of M101 that i took from a dark site with a 12" telescope for comparison. there's no real processing in this image other than stretching so i'm fairly confident what's shown is 'real', and so it should be a good reference.

https://www.astrobin.com/full/186892/0/

rob

8
General / Re: Clone Stamp Tool
« on: 2019 May 11 17:35:21 »
if you have a "well behaved" dust bunny (not 'embossed' looking and mostly round) you can probably use pixelmath to brighten (or darken) the spot.

iif(inellipse( 2728, 737, 111, 111 ),$T*1.00075,$T)

i had a spot with radius 111 at 2728,737 which i fixed in my linear master with that expression. you have to experiment with the scale factor. it helps also to use the "super nuclear" STF boost to see if the spot was brightened or darkened enough. it also helps to step away from the screen for a minute and then come back and try to see if you can still detect the spot. your eyes play tricks on you due to persistence of vision, which may make it momentarily seem like the spot is still there.

things get more complicated if you are using an OTA with a central obstruction.

rob

9
General / Re: HDR composition
« on: 2019 May 11 17:31:36 »
HDRComposition is not likely to be necessary for this type of image, unless some of the stars are saturated in the 300" master...

if there's no saturation you can probably just combine all the subs with ImageIntegration.

rob

10
General / Re: Local Normalization help
« on: 2019 May 11 17:30:14 »
i'll just add the caveat that using LN is trickier than the tutorials say. you need to use the cleanest reference you can - for me that's a carefully DBE'd integrated master - and you will likely have to at least tweak the scale parameter to avoid dark patches around some structures. IMO it's not something that you just insert in your flow without careful tweaking and evaluation of the results.

rob

11
General / Re: DynamicAlignment not working
« on: 2019 May 11 11:29:32 »
those positions on frame 2 are just where PI is guessing the stars would be. it's supposed to be a convenience. what you need to do is just grab those samples on frame 2 and slide them over to the stars they belong on.

rob

12
General / Re: Local Normalization help
« on: 2019 May 11 11:28:32 »
well, LN has several modes. the default mode is to generate .xnml files only, when run in global mode. that's probably the mode you want, rather than "apply normalization".

the idea is that rather than outputting a whole new copy of the image which have been normalized, it just outputs a file that describes how the file should be normalized. ImageIntegration knows how to read this file and do the normalization internally while it is integrating the frames. the .xnml files are small in size, which is a bonus.

so what you do then is load the _c_r.xisf files (that is, the calibrated and registered files) into ImageIntegration using the "Add Files" button, then, using the "Add L. Norm Files" button, select all the .xnml files. ImageIntegration will match them all up. then you set the Normalization mode in ImageIntegration to "Local Normalization" to make ImageIntegration use the .xnml files. the nice thing here is that because you are using the same input image files, you can easily compare the results of regular normalization and local normalization just by switching the normalization mode in II and re-running.

rob

13
General / Re: Fixed pattern noise?
« on: 2019 May 06 12:18:47 »
yes - the link works

rob

14
General / Re: Fixed pattern noise?
« on: 2019 May 06 10:19:19 »
upload to google drive, dropbox, etc., allow the file to be read by anyone with the link, and post a link here.

rob

15
General / Re: Misaligned stars??
« on: 2019 May 06 10:18:08 »
OK - in this case i would follow steve's advice. refracting elements can cause issues like this depending on the quality of the optics (and how well they match the telescope they are paired with.)

rob

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