Change default filter (ram-lak) for FBP

[EB79]

Hi, I hope you're doing well.

I’m using the Core Imaging Library (CIL) for my 3D cone-beam reconstructions and have been examining the source code to determine if I can change the default filter used in the Filtered Back Projection (FBP). While tracing the code, I discovered that CIL relies on TIGRE’s FBP, with some translation between the geometries defined in the two packages.

Could you clarify where I should make the modification to change the default filter from ram-lak to hamming? Should this be done directly in the TIGRE package, or would it require changes in the CIL package?

Thank you!

[AnderBiguri]

Heya!
Seems that FBP was not accepting optional filters, but it is now.

From TIGRE, you just need to do

recon = fbp(proj,geo,angles,filter="hamming")

or any of the other non-default 4 supported:

TIGRE/Python/tigre/algorithms/single_pass_algorithms.py

Lines 27 to 30 in 6914ca5

	opts: "shep_logan"
	"cosine"
	"hamming"
	"hann"

From CIL, I have no idea, you'd need to ask them.