指纹增强，使用的是ＳＴＦＴ短时傅里叶方法，可用。
资源文件列表
╓╕╬╞╘÷╟┐/angular_distance.m , 89
╓╕╬╞╘÷╟┐/compute_coherence.m , 499
╓╕╬╞╘÷╟┐/compute_mean_angle.m , 311
╓╕╬╞╘÷╟┐/compute_mean_frequency.m , 190
╓╕╬╞╘÷╟┐/enhance.m , 4312
╓╕╬╞╘÷╟┐/freqest.m , 1279
╓╕╬╞╘÷╟┐/get_angular_bw_image.m , 224
╓╕╬╞╘÷╟┐/get_angular_filter.m , 578
╓╕╬╞╘÷╟┐/get_radial_filter.m , 389
╓╕╬╞╘÷╟┐/imscale.m , 101
╓╕╬╞╘÷╟┐/normalise.m , 341
╓╕╬╞╘÷╟┐/otsu_threshold.m , 455
╓╕╬╞╘÷╟┐/raised_cosine.m , 206
╓╕╬╞╘÷╟┐/raised_cosine_window.m , 108
╓╕╬╞╘÷╟┐/ridgefilter.m , 2048
╓╕╬╞╘÷╟┐/ridgefreq.m , 631
╓╕╬╞╘÷╟┐/ridgeorient.m , 1576
╓╕╬╞╘÷╟┐/ridgesegment.m , 421
╓╕╬╞╘÷╟┐/segment_print.m , 414
╓╕╬╞╘÷╟┐/smoothen_frequency_image.m , 1282
╓╕╬╞╘÷╟┐/smoothen_orientation_image.m , 372