显示图像失败,但是注销掉namedWindow("disp")就可以正常显示
void _stdcall RawCallBack(LPVOID lpParam, LPVOID lpUser) { imshow("disp",img); waitKey(1); } int main() { namedWindow("disp"); return 0; }
waitKey有两个作用:
1. It waits for x milliseconds for a key press. If a key was pressed during that time, it returns the key's ASCII code. Otherwise, it returns -1.
2It handles any windowing events, such as creating windows with cv::namedWindow(), or showing images with cv::imshow().
格式 waitKey(x)
第一个参数: 等待x ms,如果在此期间有按键按下,则立即结束并返回按下按键的
ASCII码,否则返回-1
如果x=0,那么无限等待下去,直到有按键按下