alpha and eta values for the MEI model

[mcamurri]

Hi all,
I'm not particularly familiar with the MEI camera model, so I had a look at the paper first.

It seems the matrix K depends on two parameters that are not provided by the yaml: alpha (required to get the skew) and eta, which depends on the parametric curve used.

What assumptions have been made for alpha and eta?
Can in first approximation assume alpha = 0 and eta = -1?

Thanks,
Marco.

[shaozu]

Hi, @mcamurri. The misalignment is ignored so alpha is assumed to be zero. The parameter eta is mixed with the focal length parameters implicitly. BTW, you can use camodocal to handle the camera models.