Removing Field Curvature?

[sdh]

Hi, is there a way to remove field curvature in PixInsight?

If not, are there any plans to add this capability?
It seems to me like a combination of existing capabilities
in the amazing StarAlignment tool, and the Resample tool.

Steven

[Carlos Milovic]

Hi Steven

I have plans to work on this problem, but it should not be in the near future (perhaps next year). Right now I have my focus on super-resolution, a new way to automatically register any kind of images (that are closely related), and noise reduction.

To deal with field curvature, and many other similar issues, I want to implement an inverse problem approach that deals with anisotropic deconvolutions. I also want to get deeper into Fourier optics, to better understand the physics behind all kind of optical aberrations. It is a fascinating topic, but I don't expect to have results soon.

[blinky]

Is there any news on this?  Just asking as I would love a way to resolve the blobby stars I get in the corner of my images, I just cant seem to get the field flattener spacing correct.

[Carlos Milovic]

Not directly involved with this... I have a working TGVRestoration module for deconvolutions, that may be used to perform this sort of things with a minimum number of changes. Basically, all I need is a way to model the aberrations (field curvature, astigmatism, chromatic aberrations, etc.), in a global way, hopefully fast. Then, I need to calculate de adjoint operator of that degradation function. With both operations, we are set to feed the iterative algorithm, and restore the image.
If somebody gives me a hand with that, things may speed up. Right now I'm quite busy with another image processing problem, for my Ph. D. degree (magnetic susceptibility maps of brains with MRI).

Sorry for the slow advance in this.