OpenCV图像像素逻辑操作

cv::Mat m1 = cv::Mat::zeros(Size(256, 256), CV_8UC3);
  cv::Mat m2 = cv::Mat::zeros(Size(256, 256), CV_8UC3);
  rectangle(m1, Rect(100, 100, 80, 80),Scalar(255,255,0),-1,LINE_8,0);
  rectangle(m2, Rect(150, 150, 80, 80), Scalar(0, 255, 255), -1, LINE_8, 0);
  imshow("m1", m1);
  imshow("m2", m2);
  Mat dst;
  bitwise_and(m1, m2, dst);
  imshow("与操作", dst);
  bitwise_or(m1, m2, dst);
  imshow("或操作", dst);
  QString appPath = QCoreApplication::applicationDirPath();
  imagePath = appPath + "/A.jpg";
  img = cv::imread(imagePath.toStdString());
  if (img.empty())
    return;
  bitwise_not(img, dst);
  imshow("非操作", dst);
  bitwise_xor(m1, m2, dst);
  imshow("异或操作", dst);
  cv::waitKey(0);
  cv::destroyAllWindows();