How to turn a camera webcam into a video.

Question

bo hyeoun lee 2019-12-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/495360-how-to-turn-a-camera-webcam-into-a-video

评论： bo hyeoun lee 2019-12-7

I want to get the value printed on video instead of webcam.

clear
camera = webcame; % Connect to the camera      

==> camera = VideoWriter('slow.avi')
nnet = alexnet;  % Load the neural net
while true   
    picture = camera.snapshot;              % Take a picture    
    picture = imresize(picture,[227,227]);  % Resize the picture
    label = classify(nnet, picture);        % Classify the picture
       
    image(picture);     % Show the picture
    title(int(label)); % Show the label
    drawnow;   
end

I've changed it, but it doesn't work. What should I change?

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Walter Roberson 2019-12-7

I do not understand what you are trying to do?

It looks like you have code designed for webcam . Are you trying to adapt the code to read from a video instead? Or are you trying to write the titled image out to video?

bo hyeoun lee 2019-12-7

I want to make it possible to read the code by video instead of webcam.

Thank u

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Answer 1

Walter Roberson 2019-12-7

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/495360-how-to-turn-a-camera-webcam-into-a-video#answer_405283

在 MATLAB Online 中打开

camera = VideoReader('slow.avi')
nnet = alexnet;  % Load the neural net
pic = image([]);
while hasFrame(camera)  
    picture = readFrame(camera);              % Take a picture    
    picture = imresize(picture,[227,227]);  % Resize the picture
    label = classify(nnet, picture);        % Classify the picture
    pic.CData = picture;     % Show the picture
    title(round(label)); % Show the label
    drawnow ratelimit;   
end

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Walter Roberson 2019-12-7

在 MATLAB Online 中打开

I tested with the following code.

camera = VideoReader('rhinos.avi');
nnet = alexnet;  % Load the neural net
pic = image([]);
while hasFrame(camera)  
    picture = readFrame(camera);              % Take a picture    
    picture = imresize(picture,[227,227]);  % Resize the picture
    label = classify(nnet, picture);        % Classify the picture
    pic.CData = picture;     % Show the picture
    title(char(label)); % Show the label
    drawnow limitrate;   
end
delete(camera);