Reinterpretation of TV
HDTV regularization
Motivation
Steerability of directional derivatives
Total variation (TV) penalty
Total variation (TV) penalty
Limitations: patchy artifacts
Extend to higher order derivatives
1D: Straight forward
2D: Multiple partial derivatives
1st degree directional derivatives along
Rotation steerable
Vector form
Generalize to nth order derivatives
L1 norm of directional derivatives
