How can I make the centroid of bounding box to react to the line drawn inside a "LIVE" video?

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Akira Chan
Akira Chan 2014-5-5
评论： Image Analyst 2018-3-21
Greetings,
As stated in the question title, I have a program that will help track object and have already draw a line so that it will show up a video only if the object was detected. However, no matter what I do, the centroid of the bounding object will not react to the line, any ideas on how to solve this? The figure below will show you a better idea on what I am trying to do. Here, I am trying to make a counter in such a way that, when an object(centroid of object) was crossing the green line, it will add 1 to the counter. I tried putting when the X-coordinate is less than 50, then the line will turn purple while it adds a counter. Of course, seeing that I posted it here means that it is a failure.
Thank you very much.
Regards,
Chan
  2 个评论
Image Analyst
Image Analyst 2014-5-5
Well, not much we can do with what you have given us so all I can do is to give you encouragement that if you learn how to debug with this link that you'll eventually figure it out.
Akira Chan
Akira Chan 2014-5-5
Oh sorry, I got it now, I am very stupid. Thank you for your time Image Analyst. However, now that I can detect the line with centroid, I have faced another problem. Can you suggest a way so that I can increase my frame per second so that it is smooth? Because my detection when crossing the line is poor, i think it might be the smoothness of the video.

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采纳的回答

Image Analyst
Image Analyst 2014-5-5
Your video adapter might have a frame rate property you can set. Run imaqtool and see what's there.

更多回答（1 个）

haseeb zia
haseeb zia 2018-3-21
hi i am also working on such type of project , kindly tell me how to change the color of line if centroid of bounding box is above the line. there is multiple object in my video
  1 个评论
Image Analyst
Image Analyst 2018-3-21
Something like
if yTop + height/2 > rows/2
% Above middle
rectangle('Position', [xLeft, yTop, width, height], 'EdgeColor', 'r');
else
% Below middle
rectangle('Position', [xLeft, yTop, width, height], 'EdgeColor', 'b');
end

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