star alignment process with different sized images?

[h0ughy]

Can the star alignment process be used to align say a widefield image (lets say taken with a canon 20D and a 200mm lens) and a narrower image (lets say a 8" f4 scope image? but with same camera) so as to provide finer detail to the final image.   like say an orion widefield shot normally overexposing the core of M42, and adding in a processed closeup image of m42?

[dhalliday]

Hmmmnnn...(!!!)
I think SA will ALIGN just about ANYTHING...including two photos of you,taken 40 years apart...,as long as your eyes and two teeth remain
BUT...to COMBINE them,somehow....the wide field is going to be contributing about 4 pixels to the image.
I would combine two disparate images with DYNAMIC alignment,for starters...
But with vastly different scale,I think the point of combining is lost,no?
Try and flesh out for me how you feel that sticking these two images together will help you...(!!)
Dave

[h0ughy]

Hmmmnnn...(!!!)
I think SA will ALIGN just about ANYTHING...including two photos of you,taken 40 years apart...,as long as your eyes and two teeth remain
BUT...to COMBINE them,somehow....the wide field is going to be contributing about 4 pixels to the image.
I would combine two disparate images with DYNAMIC alignment,for starters...
But with vastly different scale,I think the point of combining is lost,no?
Try and flesh out for me how you feel that sticking these two images together will help you...(!!)
Dave

well i watched the video Juan did and that filled me with hope - -will try it sometime soon and get a result - LOL good or bad

[Jack Harvey]

Not exactly what you asked but a bit related?  http://www.pixinsight.com/nsaunders/Combining_Different_Exposures.wmv

[h0ughy]

Not exactly what you asked but a bit related?  http://www.pixinsight.com/nsaunders/Combining_Different_Exposures.wmv

Jack I get a HTTP 404 error on the link

[Jack Harvey]

Hmmm Niall posted the video so maybe he took it down?

[Juan Conejero]

Sorry, this video is still on the old server. You can download it here:

http://74.50.19.20/nsaunders/Combining_Different_Exposures.wmv

I'll try to move all pending files to the new server ASAP. Sorry for the inconvenience!

[Juan Conejero]

Can the star alignment process be used to align say a widefield image (lets say taken with a canon 20D and a 200mm lens) and a narrower image (lets say a 8" f4 scope image? but with same camera) so as to provide finer detail to the final image.

Probably not with the default SA parameters. If the scale difference is large and the images are dissimilar in their contents, you'll have to tweak star detection parameters.

Although it can register images under these conditions, StarAlignment has not been designed specifically to carry out these tasks. In this case, the DynamicAlignment process is probably your best option in PixInsight.

[h0ughy]

Can the star alignment process be used to align say a widefield image (lets say taken with a canon 20D and a 200mm lens) and a narrower image (lets say a 8" f4 scope image? but with same camera) so as to provide finer detail to the final image.

Probably not with the default SA parameters. If the scale difference is large and the images are dissimilar in their contents, you'll have to tweak star detection parameters.

Although it can register images under these conditions, StarAlignment has not been designed specifically to carry out these tasks. In this case, the DynamicAlignment process is probably your best option in PixInsight.

so how does that work?

[Niall Saunders]

so how does that work?

I have a video almost completed, not quite ready for upload, which deals with Dynamic Alignment.

I just need some more spare time - maybe by this weekend . . .


Cheers,

[h0ughy]

so how does that work?

I have a video almost completed, not quite ready for upload, which deals with Dynamic Alignment.

I just need some more spare time - maybe by this weekend . . .


Cheers,

oh fantastic Mr Saunders- i will be looking forward to this. Between you and Harry and  Juan the videos are brilliant, thanks for your help.

[Harry page]

Hi


If you look at this video http://www.harrysastroshed.com/lrgb.HTML

It does show how to use it 

The reason I used it in this video was there was a scale difference between my rgb and lum 


Harry

I will forgive you for not watching it earlier