speed detection using optical flow

Nachiket Patki

2018 5 5

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12 次查看（30 天）

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I was referring to this mathwork's site...

Live motion detection using optical flow

for finding the speed of objects from a video file I have. But the code didn't say anything about how to find a speed. Also when I run the code I could see no optical flow thing...can anyone help me...I must be doing something wrong. Here is the code (the main code is same as that shown in link, just a little addition of reading video file from the disk):

nFrames=0;
opticFlow = opticalFlowHS;
v = VideoReader('Activity1.avi');
while hasFrame(v)     % Process for the first 100 frames.
% Acquire single frame from imaging device.
frameRGB = readFrame(v);
% Compute the optical flow for that particular frame.
flow = estimateFlow(opticFlow,rgb2gray(frameRGB));
imshow(frameRGB)
hold on
drawnow
plot(flow,'DecimationFactor',[5 5],'ScaleFactor',25)
hold off
% Increment frame count
nFrames = nFrames + 1;
end