cv::Mat image = cv::imread("test.jpg", cv::IMREAD_GRAYSCALE); std::cout << " Element size: " << image.elemSize() << " Bytes" << std::endl;
cv::Mat mat = cv::Mat::zeros(4, 4, CV_64FC1); std::cout << "Matrix size: " << mat.total() << " bytes (" << mat.elemSize() << " Bytes per element)" << std::endl;This example creates a 4x4 cv::Mat object filled with zeros and uses the total and elemSize functions to calculate the total size of the matrix. The output will be in bytes. In summary, the elemSize function is a useful tool for calculating the size of individual elements in a cv::Mat object, which can be helpful for memory management and optimization. It is an integral part of the OpenCV package library.