椒盐噪声图片 python opencv实现[附代码]

今天爱分享给大家带来椒盐噪声图片 python opencv实现[附代码]，希望能够帮助到大家。
方法

import random
import cv2
import numpy as np
'''
    添加椒盐噪声
    :param img: 原始图片
    :param prob: 噪声比例
    :return: resultImg
    '''
def noiseSP(img, prob):
    resultImg = np.zeros(img.shape, np.uint8)
    thres = 1 - prob
    for i in range(img.shape[0]):
        for j in range(img.shape[1]):
            rdn = random.random()  
            if rdn < prob:  
                resultImg[i][j] = 0
            elif rdn > thres: 
                resultImg[i][j] = 255
            else:
                resultImg[i][j] = img[i][j]  
    return resultImg
 
img = cv2.imread('test.jpg')
resultImg = noiseSP(img, 0.05, 2)
cv2.imwrite('result.jpg',resultImg)

效果