pandas.DataFrame.where DataFrame.where(cond, other=nan, inplace=False, axis=None, level=None, try_cast=False, raise_on_error=True) inplace : boolean, default False Whether to perform the operation in place on the data axis : alignment axis if needed,
#include<opencv2/opencv.hpp> #include<iostream> using namespace cv; using namespace std; Rect roi; Mat frame, mask; void processFrame(Mat &binary, Rect &rect); int main(int argc, char* argv) { VideoCapture capture();//打开摄像头 if (!captur