高维数据的统计挑战 Modern applications of statistical theory and methods can involve extremely large data-sets, often with huge numbers of measurements on each of a comparatively small number of experimental units. New methodology and accompanying theory hav
关于灰度直方图
灰度直方图是反映一幅图像中各灰度级像素出现的频率与灰度级的关系，以灰度级为横坐标，频率为纵坐标，绘制频率同灰度级的关系图像就是一幅灰度图像的直方图。
简单地说，就是把一幅图像中每一个像素出现的次数都先统计出来，然后把每一个像素出现的次数除以总的像素个数，得到的就是这个像素出现的频率，然后再把像素与该像素出现的频率用图表示出来，就是灰度直方图。
代码实现
import numpy as np
import matplotlib.pyplot as plt
from skimage.
