Soo-Chang Pei, Jian-Jiun Ding. The generalized radial Hilbert transform and its applications to 2D edge detection (any direction or specified directions). In 2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '03, Hong Kong, April 6-10, 2003. pages 357-360, IEEE, 2003. [doi]
Abstract is missing.