How do i go about doing real-time measurement of the width of an object from an image continuously from a video input using image processing?

I will be using a camera to constantly feed a stream of live video of a black tape. I will need to continuously measure the width of the tape(which may vary) as it unrolls, detect and log these changes for a simulink based controller.

Answer 1

[Saeid]

Hi,

First you need to slice your video to solitary frames:

VideoData = VideoReader(Video Path);
NFrames = VideoData.NumberOfFrames;
for i=1:NFrames
    CurrentFrame = read(VideoData, i);
    % here you do your measurments on each frame
end;

And the measurment of the object really depends on the nature of your object and imaging condition.