Author Topic: Mosaic again....  (Read 1778 times)

Offline paulobao

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Mosaic again....
« on: 2012 November 26 09:22:39 »
Hi,

Previews worked just great! I acomplished the task (all 21 tiles together) :-)
The problem is that some tiles are "lacking the signal"! Maybe these are not the correct words but the background seems realy grey and washed.
Please compare the same 3 tiles assembled via PI and via PS. They are exactly the same! Please note the diference! The resulting 12 tile mosaic will show with 4 tiles washed out even if all were normalized for background and in PS they assembled ok!
Why this happens in PI? Any setting wrong?
Any help would be appreciated :-)

Cheers,
paulo

Offline georg.viehoever

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Re: Mosaic again....
« Reply #1 on: 2012 November 26 11:18:30 »
Did you check frame adaption in StarAlignment? Dont know if it fixes the problem. In general, GMM will not adapt signal levels. So if the source images have different signal levels, you will see this in the result as well. You need to make sure that the tiles are as similar as possible.

Georg
Georg (6 inch Newton, unmodified Canon EOS40D+80D, unguided EQ5 mount)

Offline paulobao

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Re: Mosaic again....
« Reply #2 on: 2012 November 26 12:00:32 »
Hello Georg,

yes I checked Frame adaptation!
The tiles seems similar inn CCDstack and in PS but not in PI  :-[

I realy would like to solve this because is my major issue now (for making mosaics)!
Anyway I managed to make part of the 21 tile mosaic (the Heart nebula) with good results (because it was just a 1 light of 15 min per tile...not a stack of lights!). Here the resulting 12 tile mosaic (12x 1x15 min in Ha made with my Tak FS102NSV @ 631mm + QSI532WS-M1):

(small version...)



Cheers,
paulo

Offline georg.viehoever

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Re: Mosaic again....
« Reply #3 on: 2012 November 26 13:53:41 »
Hmm, I am out of ideas.... :-[
Georg (6 inch Newton, unmodified Canon EOS40D+80D, unguided EQ5 mount)

Offline paulobao

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Re: Mosaic again....
« Reply #4 on: 2012 November 26 14:06:00 »
Thanks anyway :-)
What intrigues me is that when I use the exact same 3 files for the example the results are quite diferent in PS and in PI. In PS it seems all the background is more similar in the 3 files! In PI the one at the right is washed! All 3 files where calibrated and normalized in CCDStack.

Chhers,
paulo