'imread' was not declared in this scope

在opencv3中，会报这个异常：

'imread' was not declared in this scope

解决方法：

#include <opencv2/core/core.hpp>   #include <opencv2/highgui/highgui.hpp>using namespace cv;

  Mat imgMat = imread("20160802.jpeg");//const String* filename);

如果没有引用vc命名空间，则需要加cv::

  cv::Mat imgMat = cv::imread("20160802.jpeg");//const String* filename);