Questions about the configuration step

[PeifengJi]

Hi,guys:
I've read your paper, very excellent work!
Currently, I'm trying to run the demo data provided. But I have some questions about the configuration.

1. the tomography.ReconstructionConfig module, need user to provide mask file ( binarized image) and mask threshold for masking. But it also requires a reference image. Is it redundant if I provides both two images, as the masked image could be generated by masking the reference.
2. also the angle_names and ange_values parameters (ange_values could be generated by extracting the values from the ange_names if I provide the ange_names following the cases you provided ).
3. Could you please explain more detail about the first_point parameter?

Thank you very much!

Best regards,

Peifeng