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Messages - gvanhau

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General / Re: Quick and dirty BPP in the field
« on: 2016 March 15 05:45:05 »
If your pointing is not so bad, you could use the Image solver script, using a local star catalog to get the center of your image.
You can afterwards  also use the anotation script to see where your DSO is in yoyr image.

General / Re: Flat field problem
« on: 2016 March 14 11:41:31 »

I normally take my flats using the AV mode.

You can also try this work arround I made to compensate for the over correction:


General / Re: QHY8L FLATS - Problems in BPP
« on: 2016 March 14 11:38:39 »
Hello Paul

I know QHY8L is a bit tricky because of the two exposures on images of less than 4 sec.

For me the best method has been using the manual calibration tools istead of the script.
What I do is:

Asuming  flat duration less than 4 secs. Light duration more than 4 Secs.

Masterbias=integration of bias
Calibrated flat= Flat-MasterBias
MasterFlat= integration of calibrated Flat
MasterDark=integration of Dark ; Dark should match temp and duration of light.
Calibrated light= (Ligt - MasterDark)/MasterFlat.
No auto dark scaling can be used.

If you find that your Calibrated Light is over corrected (light corners, darker center) then you may explore this work arroud I've found to compensate.

Hope this hepls.

General / Re: Color saturation - how to increase safely
« on: 2016 February 18 11:52:13 »
I think you don't have to "linear fit" before combination. (I've never done it this way).
Just combine after DBE or jou can also combine and then DBE.
Next you have to do color calibration...


Hello Alejandro.
The background reference is the image itself (target).
I never had to set a different background refentece before.

Bug Reports / MaskedStrech unable to auto strech (to dark image)
« on: 2016 February 13 09:53:02 »
This is new to me;  I've never had problems with this.

I attached screenshot  of PI, where you can see the console output, the error message and the image I'm processing.


General / Re: Question about persistence of swap files
« on: 2016 February 09 10:13:09 »
Thank you Rob, very clear explanation.

General / Question about persistence of swap files
« on: 2016 February 09 04:34:44 »
I've seen the following behavior using PixInsight Integration module:

If I add some more pictures to the image integration module, the first images (from previous integration) run very quick, but the new added pictures take some time, because there is some math applied to them.
I may be wrong, but I remember having seen in the console, that values for previous images were taken from swap??
Some times, this happens even if I load a saved proyect, and the previous integration was done a few days ago.

Now my question is:  are swap files recorded together with projects? or what is the logic behind this behavior?


Bug Reports / Re: PI SWAP file error, could not save proyect SOLVED
« on: 2016 February 09 04:06:12 »
However, you can select a different directory to store swap files with EDIT > Global Preferences > Directories and Network > Swap storage directories.
That is ok, but as I said above, for some reason PI changed it to default location without any warning.

I disabled Norton Internet Security's automatic cleaning feature. and will also report it to them.


Bug Reports / Re: PI SWAP file error, could not save proyect solved
« on: 2016 February 08 17:47:46 »
I revised the log of my Norton Internet Security, and foud that it deleted a lot of temporal files, including the PixInsight swp files.
Now it is clear why this never happened before,  S: is not considered as temporay, but the location choosen by deffault by PixInsight is teporay....

My sugestion would be that PixInsight chooses another location for its deffault swap and other files.


Bug Reports / Re: PI SWAP file error, could not save proyect
« on: 2016 February 08 10:43:13 »
Hello Juan

I did not remove any file and did not get any warning of my Anti virus program telling me it had removed some file (I will look in the event log to see if something appears).
Also, until now, I've not had any HW Issues with this Work Station either.
This is the first issue of this kind....and until now can't  reproduce the error ....
Is there any log file we can inspect to see what happened? or is there any log we can enable to diagnose any future event?

By the way, I had configured PI to use swap files in drive S: (ssd drive) but don't know when it changed again to C:, most probabily during the last version change....


Bug Reports / PI SWAP file error, could not save proyect SOLVED
« on: 2016 February 07 13:50:57 »

I got the attached message when I wanted to save my proyect.
I am using the latest version (

I checked the path in windows, there was plenty of space in drive c: there were no issues in writing to nor reading from the drive, etc.

After the error, there was no way to save the proyect... even creating a new one.
I could open every image and every process Icon in the workspace, why did it need the swap file?
I saved the process icons and images individually, and then had to build a new  proyect by scratch.  In that action, I lost the whole process history.


New Scripts and Modules / Re: MosaicPlanner
« on: 2016 February 03 12:22:47 »
Hello Andres

I tested the script and found it very usefull.

I also have an item to add to the wish list:

I think it could be usefull to display the center coordinates of each tile in the output image.
And  if posible customize the color of tiles and texts.


General / Re: Integrating single shot colour frames
« on: 2016 February 01 13:20:43 »

If your camera is a DSLR it could be realted tho this:


General / Re: Star Colour Fringing Problem
« on: 2016 February 01 06:57:33 »
I've looked at the images in the first post, and I can see there is as you also say, an elogantion of all stars in the same angle of the color fringing.
In the color image, if you take a close look, yo can also see fringing in the smaller stars, It is less visible because it is also dimmer.
I think there is little that Juan can do about it.
In my opinion, the only rigth thing to do is to enhance the capture.

Of course, there are some tricks that can be done. For instance, you could try motion blur in deconvolution, but at the end, the best is to solve the problems at the root.


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