OpenCV中Mat操作clone() 與copyto()的區別
// Mat is basically a class with two data parts: the matrix header and //a pointer to the matrix containing the pixel values #include <iostream> #include <highgui.h> using namespace std ; using namespace cv ; int main() { Mat image = imread("1.png" , 0) ; //Mat image1(image) ;//僅是創建了Mat的頭部分,image1與image共享數據區 //Mat image1 = image ;//僅是創建了Mat的頭部分,image1與image共享數據區 //Mat image1 = image.clone() ;//完全拷貝,把image中的所有信息拷貝到image1中 Mat image1 ; image.copyTo(image1) ;//拷貝image的數據區到image1中,在拷貝數據前會有一步:image1.create(this->size , this->type) for(int h = 0 ; h < image1.rows ; ++ h) { uchar* ptr = image1.ptr(h) ; for(int w = 0 ; w < image1.cols ; ++ w) { ptr[w] = 0 ; } } imshow("image" , image) ; imshow("image1" , image1) ; waitKey() ; return 0 ; }