C实现椒盐噪声生成

实现代码如下：

void salt_peper_noise(uint8_t* gray, int width, int height){    uint8_t* img;    int i, j;    int low;    int h;    int tmp;    uint32_t n;    img = gray;    n = width * height;    low = RAND_MAX >> 7;    h = RAND_MAX - low;    for (i = 0; i < height; i++)    {        for (j = 0; j < width; j++)        {            tmp = rand() % n;            if (tmp < low)            {                *img = 0;            }            if (tmp >  h)            {                *img = 255;            }            img++;        }    }}

上面实现的是灰度图像，彩色图像类似。
效果如下：