Python is a great god to explain, what mean the following
Opencv + python

Mat img.
Bg_roi=img [y + dh - resized_hat_h: y + dh, x + dw: x + dw + resized_hat_w]
By the way, ask again, can be turned into a c + +?
S
Can't CSDN for so many years and too few words said this, I almost 40, write code for many years, also waste and this writing was written