Figure 2. Ridgelet function

From

Palmprint Recognitionvia Bandlet, Ridgelet, Wavelet and Neural Network

Mohanad A. M. Abukmeil, Hatem Elaydi, Mohammed Alhanjouri

Journal of Computer Sciences and Applications. 2015, 3(2), 23-28 doi:10.12691/jcsa-3-2-1