What is noCQ?

[Miraclelzk]

Why frequencies 0 and 2 do this

[Miraclelzk]

and Why do you need to normalize in the end

[mkazhdan]

In general, the invariance is obtained by storing a value per frequency. However, recognizing that the combination of of frequencies zero and two can be expressed as a quadratic form and using PCA it is possible to get three invariants for frequencies zero and two.

[mkazhdan]

Can't remember why we ended up normalizing in the end as scale is already accounted for...

[Miraclelzk]

I found that the implementation of the code has some details not mentioned in the paper. Are you the author of paper?

[mkazhdan]

Yep

[Miraclelzk]

Your code is awesome and super efficient. I still have a question. Is there any basis for using sqrt(8) for the fallOff parameter of EDT? Is it determined empirically?

[mkazhdan]

I think it's empirical.