opencv rectangle with dotted or dashed lines

Question

I have a line of code here that uses the python binding for opencv:

cv2.rectangle(img, (box[1], box[0]), (box[3], box[2]), (255,0,0), 4)

Th

Answer 1

Try something like this:

cv::Point P1, P2;

P1.y = 50;
P2.y = 50;

int dot_gap = 50;
int dot_width = 50;

for( int i=0 ; i < in_img.cols; (i = i+d_width) ) {

    P1.x = i;
    P2.x = i + dot_width;
    cv::line(in_img, P1, P2, cv::Scalar(0, 255, 255), 2, cv::LINE_8);
}