openCV打开图像或视频时绝对路径输入格式

1、只需输入文件名和后缀名

    当需要打开的文件存放在工程文件下的test文件夹下时，只需输入文件名和后缀名，博主在这提醒初学者，一定注意后缀名问题，我已吃过很多次亏了，一个有效的办法是加一个验证过程，如下代码所示：

Mat image = imread("pp.jpg",0);
 if (image.empty())
 {                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
  cout << "error";
  return -1;
 }
 cout << "image尺寸：" << image.rows << "  " << image.cols << endl;

 

2、绝对路径

    当需要打开的文件存放在自己指定的文件夹下时（最好不用中文路径，你懂的）会用的绝对路径，这里需要注意的是绝对路径的格式问题。从地址栏直接粘贴复制过来时不能用。如：VideoCapture capture("E:\zipai.wmv");。正确的格式是：VideoCapture capture("E:\\zipai.wmv");不知你看出区别没有。