opencv 对RGB图像直接二值化

 #include <opencv2/opencv.hpp>
 #include <iostream>
 using namespace cv;
 using namespace std;

 int main()
 {

     const char* inputImage = "33.jpg";
     Mat img;

     img = imread(inputImage, );
     if (img.empty())
     {
         cout << "Could not read input image file: " << inputImage << endl;
         return -;
     }

     img = img >;
     imshow("Img", img);
     waitKey();
     return ;
 }