Accidental pinhole and pinspeck cameras: revealing the scene outside the picture

Antonio Torralba, William T. Freeman (2012)

Key points

Smaller occluder or smaller window: sharper image, at the cost of increased noise
Increase SNR: increase occluder size (up to windows size)
- So: best results with small window and small occluder
Limitation of pinhole cameras: images need to be taken from the same point