import cv2
import numpy as np
import math
def stretchImage(data, s=0.005, bins = 2000): #线性拉伸,去掉最大最小0.5%的像素值,然后线性拉伸至[0,1]def stretch
import cv2
import numpy as np
import math
def stretchImage(data, s=0.005, bins = 2000): #线性拉伸,去掉最大最小0.5%的像素值,然后线性拉伸至[0,1]def stretch