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  • 灰度直方图均衡化(源码)

    #计算灰度级别的累加概率,然后:当前像素值 = 当前像素的累加概率 * 255
    import cv2
    import numpy as np
    img = cv2.imread('D:/pythonob/imageinpaint/img/flower.jpg',1)
    imgInfo = img.shape
    height = imgInfo[0]
    width = imgInfo[1]
    gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
    cv2.imshow('gray',gray)
    count = np.zeros(256,np.float)
    for i in range(0,height):
    for j in range(0,width):
    pixel = gray[i,j]
    index = int(pixel)
    count[index] = count[index]+1
    for i in range(0,256):
    count[i] = count[i]/(height*width)
    #计算累计概率
    sum = float(0)
    for i in range(0,256):
    sum = sum + count[i]
    count[i] = sum
    #计算映射表
    map = np.zeros(256,np.uint16)
    for i in range(0,256):
    map[i] = count[i]*255
    for i in range(0,height):
    for j in range(0,width):
    index = gray[i,j]
    gray[i,j] = map[index]
    cv2.imshow('aftergGray',gray)
    cv2.waitKey(0)

    效果图:

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  • 原文地址:https://www.cnblogs.com/cxxBoo/p/11480681.html
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