Hi, I'm currently working on a project in that area. The main workflow in the system is take a bunch of pictures, SIFT & match them, then generate a sparse model of 2d features (image coords), 3d features (point cloud in relative coords) and camera positions. We then shard and re-combine different models to synthesize larger or more precise reconstructions. I'm building with clojurescript & Three.js[0] in the frontend, and can recommend the stack

Back to your comment I'd love to hear what you're looking to do and what you'd need, sounds like I may have explored the same problem space.

[0] https://threejs.org/