Frequently
Approximately Satisfied constraints
•The intensities in a typical image
satisfy many different linear constraints very
accurately, and violate a
few constraints by a lot.
•The constraint violations fit a
heavy-tailed distribution.
•The negative log probabilities
of constraint violations can be used as energies.
Violation
0
Gauss
Cauchy
energy
-
+
On a smooth intensity
patch the sides balance the
middle
-