霍夫变换，包括同心圆、重叠圆以及小间距圆的边缘检测-Hough transform, including concentric circles, overlapping circles, and small pitch circle edge detection

这是一篇论文，说的是关于哼唱检索系统中的基频检测，用的算法是短时平均幅度差函数-This a paper which tell us about the pitch detdcting in the Humming system,the method that used is AMDF