馒头and花卷

摘要： Gonzalez R. C. and Woods R. E. Digital Image Processing (Forth Edition). 令$r_k, k = 0, 1,2, \cdots, L-1$ 表示图片密度值为$k$, \[ h(r_k) = n_k, \: k = 0, 1, \c 阅读全文