Fix incorrect determinant calculation; included reference for equation.

aces / brainbrowser

Web-based visualization tools for neurological data.

https://brainbrowser.cbrain.mcgill.ca/

GNU Affero General Public License v3.0

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Fix incorrect determinant calculation; included reference for equation. #271

Closed rdvincent closed 8 years ago

rdvincent commented 8 years ago

I discovered that my calculation of the determinant was just wrong. It gave nearly-correct results in some cases, but it was not correct in others. This correction improves the registration of NIfTI-1 files.