PixInsight Forum (historical)

PixInsight => General => Topic started by: Robert Q. Kimball on 2020 February 05 10:45:52

Title: More Help Needed with Mosaic
Post by: Robert Q. Kimball on 2020 February 05 10:45:52

I am in the process of putting together a six panel mosiac of the Witch's Head Nebula.  I have a synthetic star field that is the right size for my mosaic.  I am able to register all of my panels with the sythetic star field, but when I use the GradientMergeMosaic process i am getting double star images in several of the overlap areas. 

What I think I need is for the Registration process to work harder to distort my images to align with the non-deformed synthetic star field.  I've tried everything I can think of to no avail.

I'm attaching a screen shot of one of the seams.  Some of the seams are perfect, but there are always several with double stars.

Any advice would be welcome.

Title: Re: More Help Needed with Mosaic
Post by: pfile on 2020 February 05 11:31:23

try using MosaicByCoordinates to generate the registered panels. it's designed to undo these distortions.

rob

Title: Re: More Help Needed with Mosaic
Post by: Robert Q. Kimball on 2020 February 06 15:26:05

Thank you for the tip!  Probably 90% of my problems were eliminated.  I'll probably play around with the various combining strategies and clamping to see if I can do better.  This is about the third or fourth time you've helped me.  Thanks

Title: Re: More Help Needed with Mosaic
Post by: pfile on 2020 February 06 16:07:34

that is great to hear, glad i could help!

rob