How do I extract individual frames while taking video input from a webcam?

Question

Deepak Purti 2020-6-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/551137-how-do-i-extract-individual-frames-while-taking-video-input-from-a-webcam

回答： Saurabh Kumar 2020-6-19

Here's a snippet of the program for Fall Detection which analyses a video clip frame-by-frame :

while ~isDone(vid)               % vid = vision.VideoFileReader(vidname);    where vidname is the filename of the video clip
    pause(0.0001);
    frame =  step(vid);
    frameNo = frameNo+1;
    

How do I edit it so that instead of a video clip the input is taken from my webcam?

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Answer 1

Saurabh Kumar 2020-6-19

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/551137-how-do-i-extract-individual-frames-while-taking-video-input-from-a-webcam#answer_453994

在 MATLAB Online 中打开

You just need to create a VideoDevice System object (say vidobj) and replace vid with vidobj :

% Construct a VideoDevice System object associated with the Winvideo adaptor with device ID of 1.
vidobj = imaq.VideoDevice('winvideo', 1);           
    
while true                     % The program will run as long as the webcam is on.
    pause(0.0001);
    frame =  step(vidobj);
    frameNo = frameNo+1;
    