Problem on Image Int. persists!!!"God Bless the Ctrl button!!!"

[pmesquita]

Georg,

does the BatchPreProcessing automatically subtract the master dark from each CR2 light file before the Image integration?

if so, then I really need to go back to The BatchPreProcessing. I hope I don't get another debayer surprse pattern :-)

cheers
paulo

1. How to check your aligned images: Just load them into PI and look at them. You can select multiple images in the "Open Copy.." dialog, or you can drag&drop them from Explorer to the PI desktop. There is also an Animation script that can be helpful - see scripts menu.
2. The BatchPreProcessing script does everything that is needed for calibrating your images - provided you give it bias/dark/flat frames.

Georg

[georg.viehoever]

Yes, of course. It does everything that is necessary for image calibration, including bias subtraction, dark scaling, dark subtraction, flat division

Georg

[pmesquita]

Then I'll go for a second round. i always have the emergency parachute...CTRL...button...hehehe.

Thanks Georg for all your time and help.

Cheers
Paulo

Yes, of course. It does everything that is necessary for image calibration, including bias subtraction, dark scaling, dark subtraction, flat division

Georg

[pfile]

1. How to check your aligned images: Just load them into PI and look at them. You can select multiple images in the "Open Copy.." dialog, or you can drag&drop them from Explorer to the PI desktop. There is also an Animation script that can be helpful - see scripts menu.
2. The BatchPreProcessing script does everything that is needed for calibrating your images - provided you give it bias/dark/flat frames.

Georg

i use the blink process to check my subs. it basically makes a movie out of all the images and bad subs stand out pretty easily.

for more advanced analysis you can find the SubframeSelector script here in the forums and do batch FWHM analysis of all your subs. it's a great script.

[cs_pixinsight]

pfile, I did a forum search for subframeselector and "sub frame selector" and the only message that came up is your current post.  Do you have a URL for the script thread containing this script - sounds interesting and helpful?

Thanks,
Craig

[pmesquita]

Can you elaborate on the Blink process please? is it a tool on PI?...newbie here...:-)

cheers
paulo

1. How to check your aligned images: Just load them into PI and look at them. You can select multiple images in the "Open Copy.." dialog, or you can drag&drop them from Explorer to the PI desktop. There is also an Animation script that can be helpful - see scripts menu.
2. The BatchPreProcessing script does everything that is needed for calibrating your images - provided you give it bias/dark/flat frames.

Georg

i use the blink process to check my subs. it basically makes a movie out of all the images and bad subs stand out pretty easily.

for more advanced analysis you can find the SubframeSelector script here in the forums and do batch FWHM analysis of all your subs. it's a great script.

[pfile]

pfile, I did a forum search for subframeselector and "sub frame selector" and the only message that came up is your current post.  Do you have a URL for the script thread containing this script - sounds interesting and helpful?

Thanks,
Craig

i think it's in the thread for PSFEstimation, since it's an offshoot of that script.

yep -

http://pixinsight.com/forum/index.php?topic=4010.msg33616#msg33616


rob

[pfile]

Can you elaborate on the Blink process please? is it a tool on PI?...newbie here...:-)

cheers
paulo

yes, Blink is a process in PI. you load all the images you're interested in into the process, then click either the autohistogram button (if the illumination is very different) or the STF button (if the illuminations are similar), set a speed, and play the movie.

there is also a script called Blink but it's obsoleted by the process, which is faster.

don't forget to "close all images" before closing Blink as otherwise all the images will still be held in memory.

[georg.viehoever]

The Blink process is called Animation 2.95 in PI.
Also, I recommend you learn to use the search functionality of the forum. This will answer many of your questions.
Georg

[pmesquita]

Also, I recommend you learn to use the search functionality of the forum. This will answer many of your questions.

....I'm getting there...I'm getting there...this 52 year old hard disk of a brain has some bad sectors....need formatting. :-))))

I've just posted my 5 th pic..or should I say my 1st pic post apocalypse?

cheers
Paulo

[pfile]

The Blink process is called Animation 2.95 in PI.
Also, I recommend you learn to use the search functionality of the forum. This will answer many of your questions.
Georg

whoops, sorry, yep. it's Animation.

[pmesquita]

I've just tried it out and it's quite neat.

...the good news...I didn't mess anything up :-)))

cheers
PAULO

The Blink process is called Animation 2.95 in PI.
Also, I recommend you learn to use the search functionality of the forum. This will answer many of your questions.
Georg

whoops, sorry, yep. it's Animation.

[georg.viehoever]

I wanted to see what I could do with the M42 data despite missing calibration. Here is what I got going into integration and stretch, but not beyond this (e.g. noise reduction):

- load CR2 files into Animate script. Identify image LIGHT_25s_400iso_+24c_1007stdev_20121109-02h17m48s878ms.CR2 as unusable because it has double exposure
- Align images with default settings in StarAlignment
- Stack images with ImageIntegration, using Average, No Weighting, no rejection
- Crop image not to include the border of the stacked area
- Simulate Bias subtraction with DBE: Place 4 points into the dark corners of the image, correct by subtraction. Need to set tolerance to 10 for this.
- Simulate Flat division with DBE: Place sample points carefully across the image, avoding stars and nebula, correct by division.
- Use STF to get visual impression, see screenshot left. Now compare this to the result immediately after stacking (without "pseudo" calibation) on the right. In the "calibrated" version, you still see some of the artifacts that could have been avoided with proper calibration. Nevertheless, it is a start...

Just an experiment.

Georg

[pmesquita]

Hey Georg,

this is very good help. I have a troublesome M78 and I'm going to apply this technique you just taught me. Thank you very much, you really brought my 1st M42 to proper values.

Thanks a million
Paulo