how can i get screenshot continuously by pressing key?

Question

a.s 2020-9-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/590041-how-can-i-get-screenshot-continuously-by-pressing-key

编辑： a.s 2020-9-8

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This is my program that I can take a screenshot only once.

i want to take screenshot continuously in video by pressing key.

Can I do this by adding an index?

thanks before.

a = imaqhwinfo;
vid = videoinput('winvideo',1);
set(vid, 'FramesPerTrigger', Inf);
set(vid, 'ReturnedColorspace', 'rgb')
vid.FrameGrabInterval = 5;
start(vid) 
while(vid.FramesAcquired<=200)
    
    Key=get(gcf,'CurrentKey');
    if Key =='s'
        img1 = getsnapshot(vid);
        break;
    end

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KSSV 2020-9-7

You need to remove break and use strcmp instead of ==

a.s 2020-9-7

在 MATLAB Online 中打开

data = getsnapshot(vid);

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Answer 1

KSSV 2020-9-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/590041-how-can-i-get-screenshot-continuously-by-pressing-key#answer_490921

在 MATLAB Online 中打开

a = imaqhwinfo;
vid = videoinput('winvideo',1);
set(vid, 'FramesPerTrigger', Inf);
set(vid, 'ReturnedColorspace', 'rgb')
vid.FrameGrabInterval = 5;
start(vid) 
while(vid.FramesAcquired<=200)
    
    Key=get(gcf,'CurrentKey');
    if strcmp(Key,'s')
        img1 = getsnapshot(vid);        
    end
end

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a.s 2020-9-8

编辑：a.s 2020-9-8

thank you so much.....Now I want it to show me the frames every time I press the button. For example, I pressed the button 4 times.How can I see these 4 frames?

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