Being Undigital: The Wyckoff principle
A sufficiently overexposed image provides enhanced shadow detail, since there is sufficient gain to overcome background noise.

We no longer see even how many people are outside in the bright sunlight, yet we see much more of the interiour detail of the building

Contact info: Professor Steve Mann, University of Toronto, Department of Electrical Engineering, 10 King's College Road, Toronto, Ontario, M5S 3G4