Back to Search
Start Over
Light Structure from Pin Motion: Geometric Point Light Source Calibration
- Source :
- International Journal of Computer Vision. 128:1889-1912
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- We present a method for geometric point light source calibration. Unlike prior works that use Lambertian spheres, mirror spheres, or mirror planes, we use a calibration target consisting of a plane and small shadow casters at unknown positions above the plane. We show that shadow observations from a moving calibration target under a fixed light follow the principles of pinhole camera geometry and epipolar geometry, allowing joint recovery of the light position and 3D shadow caster positions, equivalent to how conventional structure from motion jointly recovers camera parameters and 3D feature positions from observed 2D features. Moreover, we devised a unified light model that works with nearby point lights as well as distant light in one common framework. Our evaluation shows that our method yields light estimates that are stable and more accurate than existing techniques while having a much simpler setup and requiring less manual labor.
- Subjects :
- Physics
Caster
Plane (geometry)
business.industry
Epipolar geometry
020207 software engineering
02 engineering and technology
law.invention
Optics
Artificial Intelligence
law
Position (vector)
Shadow
0202 electrical engineering, electronic engineering, information engineering
Pinhole camera
Structure from motion
020201 artificial intelligence & image processing
Point (geometry)
Computer Vision and Pattern Recognition
business
Software
Subjects
Details
- ISSN :
- 15731405 and 09205691
- Volume :
- 128
- Database :
- OpenAIRE
- Journal :
- International Journal of Computer Vision
- Accession number :
- edsair.doi...........fad1659105b50420700145275ac1f5d9