opencv像素整体取反

cv::Mat pimg;

pimg = ~pimg;

#include<opencv2/opencv.hpp>
 using namespace cv;
 
 int main()
 {
 		Mat src = imread("001.png");	
 		imshow("src", src);
 		
 		waitKey(0);
 		Mat srcimg = ~src;
 		imshow("src", srcimg);
 		waitKey(0);
 }