• Joint Bi-layer Optimization for Single-image Rain Streak Removal

## Terms

Frobenius norm

a.k.a Euclidean norm, $\left\lVert A \right\rVert = \sqrt{\sum{i=1}^m{\sum{j=1}^n{|a_{ij}|^2}}}$

fidelity term

Jensen’s inequality

The mean value of a convex function is never lower than the value of the convex function applied to the mean.

L0 regularization

l0 norm 是统计数组中的非零元素