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Messages - frasax

Pages: 1 [2] 3
General / Re: Theli an PI Channel Combination
« on: 2017 February 11 08:53:30 »
Hi Juan,

maybe i do from time to time in the future, but for now i don´t change my workflow. I´m very happy with Theli and it is hard to beat by any software speaking of quality.

Any other suggestions?

CS Frank

General / Theli an PI Channel Combination
« on: 2017 February 11 07:47:55 »

i use Theli for my data reduction, and start imageprocessing with already color calibrated Fits Files, out of Theli.
The Channel Combination always fails, and produces very bad looking RGB Images, with totally wrong colors. It seems like PI interprets the Fits Files somehow wrong.

I have to add, that Theli gives out Fits Files with WCS headers and Plate Solvings. These look much different then standard Fits Headers.

What could be the reason for this fail, and what is a possible solution. Right now i open my single R G and B Fits Files in a third party software, combine them to RGB and then open this one in PI.

CS Frank

General / Re: BatchPreProcessing vs single Integration Steps
« on: 2017 January 31 09:55:55 »
Hi Geoff,

i had this paper already, but not studied yet.
Thank You

General / BatchPreProcessing vs single Integration Steps
« on: 2017 January 29 15:42:05 »
Hi there,

i´m looking for the best ImageIntegration Process for my monochrome CCD Images. So, the BatchPreProcessing Script is very handy an so. But are there advantages to go through the single Processing Steps? What would you look for, or do you have any recommendations to yield the best results?

I´ve used a professionell Software for years, but i´m frustrated because of its sensitivity. I´m looking for a way to yield the best SNR, best FWHM and superior Background extraction and resampling.

CS Frank

General / Re: Crop Lum and RGB
« on: 2015 February 17 13:37:59 »
Ahhh Easy, Thank you!

CS Frank

General / Crop Lum and RGB
« on: 2015 February 17 11:10:18 »

i´d like to crop two (or more) already aligned Frames, the Luminance and the RGB Chanel. Is that possible and if yes, how?

CS Frank

General / Image covered with Nebula, DBE?
« on: 2014 May 01 11:06:41 »
Hi there,

i do have an image almost covered with dark nebula. There is just a small filed of "plain" background in one of the corners of the image. how should i do the DBE in that case?

CS Frank

General / Re: Stretching with Masks
« on: 2014 February 07 14:40:04 »
Hi Geoff,

it´s not THAT bad Data:-)
And i´d like to know in general if masking does make sense at a very first stretch.

CS Frank

General / Stretching with Masks
« on: 2014 February 07 12:51:49 »
Hi there,

i´ve browsed through several Postings and Tutorials, but couldn´t find the right answers.

I do have an image, which has some blurred stars due to bad focussing, seeing etc. I´d like to mask the stars from the first stretching on. I´ve tried masked stretch script which seems to work nicely concerning the stars, but which is not aggressiv enough to stretch my image to a good point.

So what would be you´re way to solve my problem?

CS Frank

General / Re: Enhancing Ha Black and White
« on: 2014 February 07 08:03:43 »
Hi Rob,

thanks for your suggestions, i will give it a try.

CS Frank

General / Enhancing Ha Black and White
« on: 2014 February 04 10:52:19 »
Hi There,

to get more comfortable with PI, i´d like to process some Data of an Ha BW Picture. What are the suggested Tools to enhance such Pictures in Contrast, Details and make it more spectacular?

Looking forward to all you suggestions.

CS Frank

General / Re: Stretching in PI
« on: 2013 January 04 16:19:15 »
autoSTF is going to compute some statistics on the image and stretch accordingly. so by "the same" i don't mean stretching with the same parameters/amount but stretching such that the brightness of the results is similar. you just want the L and RGB to have similar histograms before combination. that's what autoSTF does...


this is my Question. What is happening here exactly? I can´t find anything according this "computations" neither in the description of STF nor in any Tutorials.

CS Frank

General / Re: Stretching in PI
« on: 2013 January 03 09:36:36 »
Hello Kai,

of course i know. I´m talking about the possibility of transfering the stf stretch to the histogram.

CS Frank

General / Re: Stretching in PI
« on: 2013 January 02 15:44:32 »

my question was maybe misleading. I thought PI computes the stretching factors (including the background) depending of the S/N ratio of the picture. But maybe this is to complex or it doesn´t make sense at all.

CS Frank

General / Re: Stretching in PI
« on: 2013 January 02 13:48:31 »
Hello Herbert,

frohes Neues Jahr!:-)

OK, i thought the aggressivness is calculated by PI automatically . So if not what is the benefit of using STF instead of a standard histogram curve?

Maybe i have a total wrong idea of stretching at all:-)

CS Frank

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