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Messages - cwiede

Pages: [1] 2
1
Bug Reports / Re: Dragging processes and masks
« on: 2017 September 09 10:28:04 »
Dragging STF to HistogramTransformation works hassle-free...

2
Bug Reports / Dragging processes and masks
« on: 2017 September 09 10:21:19 »
Hi,
I installed the latest PI-version (Version 01.08.05.1352 Ripley (x64)) on a late 2009 Imac with El Capitan (12 GB Ram) and have problems when dragging processes or masks on images. When I drag a process on an image PI does not react. When dragging I have to wait over the image fore two seconds with the mouse button pressed and when I let loose the process will be applied. Applying masks by dragging is not possible at all.
Any ideas?
Best regards
Christof

3
Wish List / OIS - Optimal image subtraction
« on: 2016 November 29 11:26:51 »
Hi,
I would very much like to have a tool for OIS (optimal image subtraction) as described by Alard and Lupton in 1995 (https://arxiv.org/abs/astro-ph/9712287) in PixInsight. That would help identifiying transients in image series. Or is there a way in PixInsight I don't know to do this? A simple pixelmath-operation is to coarse.
Best regards
Christof Wiedemair

4
Wish List / Re: Direct Star Subtraction from Images
« on: 2016 September 26 03:12:09 »
Hi,
I also would like to have a tool for OIS (optimal image subtraction) as described by Alard and Lupton in 1995 (https://arxiv.org/abs/astro-ph/9712287) in PixInsight.
Best regards
Christof Wiedemair

5
Wish List / Decompression of fz-files
« on: 2016 August 10 10:39:31 »
Hi!
PixInsight can't read fits-files compressed with the fpack alogrithm (https://heasarc.gsfc.nasa.gov/fitsio/fpack/). If someone would implement this, I would be glad.
Best regards
Christof

6
General / Re: AperturePhotometry question
« on: 2016 February 03 10:43:45 »
Hi,
I suppose this does not mean, that the aperture used to do photometry on a file does depend on the measured FWHM. If you have long time series with changing seeing or focus the script nevertheless uses the same aperture size for all the frames, right? Would it be a good idea to change that?
Best regards
Christof

7
General / Re: Join plots from SubframeSelectorScript
« on: 2016 January 31 08:46:41 »
Hi,
I would like to rephrase the question according to what I've learned in the meantime: I have a fits-file with more than one HDU. How can I arrange all the images (of equal size) one below the other in a fits-file with only one HDU? Is there a way in Pixelmath to access the HDUs in a loop?
Any suggestions?
Best regards
Christof

8
General / Join plots from SubframeSelectorScript
« on: 2016 January 30 10:28:48 »
Hi,
the SubframeSelector-Script produces several plots to describe the data quality of a series of images. It is also possible to export these plots. The result is a single fits-file which seems to contain all the plots. I am looking for a simple way to join all these plots in one single jpg-file or gif-file. For this purpose I would need to put one plot below the next. I think Pixelmath could do this in a loop, but I'm not skilled enough... :( I also tried with PreviewAggregator and ImageInsert...
Thank you
Christof

9
General / Re: Get rid of reflection
« on: 2015 March 14 15:04:40 »
I show you the rest of the image, so you understand, why I really would like to have the problem solved  ;)

10
General / Get rid of reflection
« on: 2015 March 14 12:50:07 »
Hi,
I have a non-astronomical image wich however requires a demanding treatment, so I thought to use PixInsight. I took the image through a window and therefore I have a reflection on it. I tried to remove the pattern with a multiscale-median-transformation following a suggestion from Gerald but I had more success with a  fourier-transformation where I clone stamped away the horizontal pattern. However even if the pattern disappears (more or less) I still have a bluish veil. I tried to subtract the median of a small preview of the bluish veil from the entire image, but I'm not happy with the result. Can anyone suggest a cooking recipe?
You can download the tif-file (8MB) here: www.astrocusanus.org/wiedemair/reflex.tif.zip
Best regards
Christof Wiedemair

11
General / Re: Introduction and calibration question
« on: 2015 January 13 13:32:17 »
Hi Duncan,
I'm a newbie myself, but I also use flatdarks. I build masterflatdarks and masterdarks just by averaging (or by making the median) - no bias correction! Also when I calibrate the flats I don't use a masterbias. Each flat contains the flat signal, the dark current and the bias. The masterflatdark contains the dark current and the bias. So if I subtract the masterflatdark from each flat, the flat signal is the only thing that remains. Same thing with the calibration of the lights. If I subtract the masterdark I get rid of the dark current and the bias. The light signal is the only thing that remains.
I never take bias frames. I think they are only needed if you want to create a new masterdark using another masterdark aquired with different exposure time. In this case you would subtract the masterbias, rescale the dark current and add the masterbias again.
Hope this is correct...
Best regards
Christof

12
General / Re: Equatorial coordinates of cursor position
« on: 2014 November 17 05:23:59 »
Works! Great! Thank you Andres!

13
General / Re: Equatorial coordinates of cursor position
« on: 2014 November 15 09:54:41 »
Ok, that works, thank you. I would however prefer a solution inside Pixinsight. Any other solutions?
Christof

14
General / Equatorial coordinates of cursor position
« on: 2014 November 15 06:33:45 »
Hi,
I recently discovered the image solver script and find it very useful. I suppose there is no way to see the equatorial coordinates of the current cursor position, right? Below on the left I just see the pixel coordinates... Is there any way to change this?
Best regards
Christof

15
General / Re: Fourier transform - what to clone stamp
« on: 2014 August 28 01:32:00 »
Hi Gerald,
works perfectly! Thank you very much! The mask protects more than just the stripes, but the result looks very good. I have to read more about this MultiscaleMedianTransform-Tool!
Best regards
Christof

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