draw a plot between two center points in real-time

opencv
c++

asked 2013-12-15 17:19:55 -0600

mahsa
58 ●6

updated 2013-12-20 12:33:41 -0600

Moster
1716 ●5 ●24

If I want to draw a line between (center.x , center.y)in the current frame and (center.x , center.y) in the previous frame..should I every time that the code runs keep it in a vector and then take them two by two and use cvPoint() and cvLine() ?

Is this the correct way to do that by using opencv?

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answered 2013-12-20 09:05:32 -0600

Flart

133 ●1 ●3 ●9

updated 2013-12-20 09:07:39 -0600

You can move center from previos frame to current frame, and then draw line.

cv::Point preCenter = cv::Point(0, 0); 

while(true)
{
    cv::Point center = cv::Point (preCenter.x+5, preCenter.y+5);

    cv::line(img, preCenter, center, cv::Scalar(255,0,0));

    preCenter = Point(center);
}