opencv 随机数使用

包含头文件

#include <core.hpp>

//返回随机int的函数原型

   //! returns a random integer sampled uniformly from [0, N).

    unsigned operator ()(unsigned N);

例子：RNG rng=theRNG();

            unsigned int rand_num = rng(256);  //返回[0,256)之间的随机数

    //! returns uniformly distributed integer random number from [a,b) range//返回[a,b)的int随机数

    int uniform(int a, int b);

例子：RNG rng=theRNG();

             int rand_num = rng.uniform(0,100);  //返回[0,100)之间的随机数

    //! returns uniformly distributed floating-point random number from [a,b) range//返回[a,b)的float类型随机数

    float uniform(float a, float b);

例子：RNG rng=theRNG();

             float rand_num = rng.uniform(0,1.0);  //返回[0,1.0)之间的随机数

    //! returns uniformly distributed double-precision floating-point random number from [a,b) range//返回[a,b)的double类型随机数

    double uniform(double a, double b);

例子：RNG rng=theRNG();

             double rand_num = rng.uniform(0,1.0);  //返回[0,1.0)之间的随机数

    //! returns Gaussian random variate with mean zero.//返回均值为0的高斯随机数

    double gaussian(double sigma);//sigma为标准差

例子：RNG rng=theRNG();

            
double rand_num = rng.gaussian(1);  //返回均值为0标准差为1的高斯随机数