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Messages - alcol

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General / Re: register new images with existing ones
« on: 2018 June 20 12:07:32 »
Thanks everyone, most helpful.

General / Re: register new images with existing ones
« on: 2018 June 19 21:34:10 »
Thanks Chris much appreciated

General / register new images with existing ones
« on: 2018 June 19 18:18:22 »
Hi folks, looking for advice.

If I have a batch of images that I calibrate, register and integrate. Can I save one of the registered images from this batch so that if I take more images at a later date I can simply register them against the saved registered image from the earlier batch?

Thanks for clarification.

General / Re: Gradient Merge Mosaic error message
« on: 2018 February 06 16:53:21 »
Hi John

pretty sure I followed the process, as per your note, to get to GMM


General / Re: Gradient Merge Mosaic error message
« on: 2018 February 06 09:31:44 »
Hi John
These are the images that have the black areas in and contain the mosaic part and show its position in the overall mosaic. The measurements I have quoted are the size of these images, they are indicated in the process window when the images are opened.

Not sure why these very slight differences occur but I have found a way round it by opening the 2 images (in the 4 I quoted) and cropping 1 pixel off the 6302 measurement and 1 pixel off the 8446 measure. The 4 images are then the same size at 8445 x 6301 and are loaded into GMM and the mosaic is produced, no joins showing or pinched stars.

I have to say, it has worked without a problem in the past, so I'm not sure how 2 of the images gain an extra pixel, one in width and one in height.

General / Gradient Merge Mosaic error message
« on: 2018 February 05 20:26:59 »
Hi Folks help required.

I have been successful in the past with mosaics but I seem to have run into trouble with the 4 part HA Rosette nebula. I have cropped the 4 integrated images and ran through the mosaic process (in fact 2 or 3 times) all seems well until I put the images into the Gradient Merge Mosaic tool and it gives me a message "Error: Current image width differs from first image width.
<* failed *>
Checking the 4 image sizes I get 8445 x 6302  8445 x 6301  8446 x 6301  and 8445 x 6301  before starting the mosaic process all 4 images were identically cropped.

Anyone any idea where the process may have changed the image sizes? I followed Kayron's tutorial at


General / Re: combining images from different scopes and cameras
« on: 2018 January 16 11:37:41 »
Thanks Mike, appreciated.

General / Re: combining images from different scopes and cameras
« on: 2018 January 06 10:59:06 »
Hi folks
I haven't explained too well what my problem is.

It is not with the production of the mosaic itself it is about how to combine data sets from different times and different FOV and how to handle the dark areas left on the integrated image (without cropping it out). The images I posted are about the use of subs taken some time ago of the full rosette nebula (two images on the left) and adding this data to an image of one quadrant of the rosette nebula taken recently (the same data would be added to the other 3 quadrants of the nebula).

The problem is what to do about the dark area that result because the old data only contributes to part of the quadrant image - as illustrated by the image bottom right.

As suggested I did re run the star alignment using FrameAdaption but this made no difference.

Thanks for any further help

General / Re: combining images from different scopes and cameras
« on: 2018 January 05 19:17:45 »
Thanks Guys, I have checked the settings I used on Staralignment and i didn't have Frame adaption ticked. Will retry with this enabled. Tutorials I have read suggest that this is disabled, but I will give it a try and report back.


General / combining images from different scopes and cameras
« on: 2018 January 04 16:34:05 »
Hi folks

Any feedback on the following would be welcome. I have a number of Ha subs taken last year some from an Atik383 camera and some a ASI1600 both on  an ED80 scope (unfortunately the 2 batches rotated by 90 degrees). I recently decided to produce a 4 part mosaic of the Rosette Nebula used the ASI1600 camera on an ED120 scope and wanted to add the data gathered last year.

I read up on how to combine the subs simply using StarAlignment and ImageIntegration.  I have attached the view of the various subs. The 2 images on the left are from the 2 batches subs taken last year with the ED80 scope and the one at top right is a sub of 1 part of the 4 part mosaic taken on the ED120, there are obviously also 3 other sections (not shown). The image, bottom right is the integrated image of all the subs, this is produced using the top right part mosaic sub as the reference image. The other 3 sections of the mosaic would be integrated in the same way.

What I don't quite understand is how to get rid of the various shades of mainly background in the integrated image? It could be cropped out but it would get very close to the nebula in places. Using DBE as the next stage without cropping out the various shades of background would presumably cause some distortions to the image?

Advice on how to progress the mosaic would be appreciated

Announcements / Re: PixInsight 1.8.5 Released
« on: 2017 November 10 20:06:13 »
I noticed the SHO-AIP script is missing; is this script no longer supported in 1.8.5?

What is the answer has it gone and never to return?

General / Re: using workspaces
« on: 2017 November 05 16:15:51 »
Thanks for your input Mike, most helpful.

General / Re: using workspaces
« on: 2017 November 04 20:21:20 »
Thanks Mike, presumably that means that you might have to have a fair number of them if you want to divide projects up into subcategories?

General / using workspaces
« on: 2017 November 03 21:04:30 »
Just started to put imaging files etc into Projects and decided to split data and processing into a number of Workspaces.
My first project involves a 3 part mosaic so I decided to put images for each part in a separate Workspace and renamed them mosaicpart1, mosaicpart2 and mosaicpart3 plus a 4th workspace renamed "masks". Saved the whole lot as a Project.

However, I then set up another project for an LRGB image and set up 2 Workspaces  "Limage" and "RGBimage" and saved it.

When I open either of the projects all 6 Workspaces set up open in the window, albeit only the data relevant to the project opened appear in the relevant Workspace and the others are empty.

I thought opening a Project would only open the Workspaces relevant to it?

Am I missing something?

Release Information / Re: New in PixInsight 1.8.5: FrameAdaptation
« on: 2017 September 28 14:51:06 »
Can someone give me some clarification. I am getting some odd master images resulting from running using localnormalization (LN) on sets of Andromeda Galaxy images I have. these images were taken at 60s, 120s and 300s. I have registered them all together, is the process to produce LN images in batches aligned with the exposure lengths or can they all be run together. ie add all the images into LN and run it and then all the images into Image Integration?

Putting all the subs into LN together give me an image, but still with a gradient. When I apply DBE to it I get a rather horrible result.

Any ideas please?

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