Author: Alex Locher

For my 3D project I often use nvm files for storing the data of 3D models. NVM files are originally used in VisualSfM from Changchang Wu. This project contains a bunch of tools I often use for manipulating these files and are just here in case its of any use to somebody..

The specification of the original NVM version 3 file format can be found here

The original file format only allows for a very trivial pinhole camera model with a single radial distortion. I extended the format into V4, which allows for flexible camera models (see CameraModel.h).

In addition measurements of features are stored in absolute image coordinates (with top left pixel beeing (0,0) ) rather than relative to the principal point as in NVM_V3.

Copyright 2017 Alex Locher

nvmtools is realeased under the GPLv3 Licence.