OpenMVG
open Multiple View Geometry library. Basis for 3D computer vision
...Its libraries cover image handling, feature description, feature matching, feature tracking, camera models, triangulation, robust estimation, and geometric solvers. Command-line binaries handle individual reconstruction stages that can be combined into complete pipelines. Reconstructed scenes can be exported to other multi-view stereo tools for dense point clouds and textured meshes. The project emphasizes readable, maintainable implementations backed by tests and examples. It runs on Linux, macOS, Windows, Android, and iOS.