how to take pictures from webcam connected from phone on matlab

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Sang 2022-11-9

0
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https://ww2.mathworks.cn/matlabcentral/answers/1847078-how-to-take-pictures-from-webcam-connected-from-phone-on-matlab

评论： DGM 2022-11-9

i have a video connected webcam from phone as follows. so how can i capture images directly from them

url = 'http://192.168.2.6:8080/shot.jpg';
    ss = imread(url);
    fh = image(ss);
    while(1)
        ss = imread(url);
        set(fh,'CData',ss);
        drawnow;
    end
try
    info = imaqhwinfo;
catch 
    errordlg('Webcam aquisition not supported.')
    return
end

回答（1 个）

Adam Danz 2022-11-9

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https://ww2.mathworks.cn/matlabcentral/answers/1847078-how-to-take-pictures-from-webcam-connected-from-phone-on-matlab#answer_1095088

Use exportgraphics to capture the image within your axes.

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Adam Danz 2022-11-9

If there cases where exportgraphics distorts image geometry, I'd like to be aware of them. imwrite is another good option, thanks @DGM.

DGM 2022-11-9

在 MATLAB Online 中打开

I wouldn't say "distorts", but if it behaves like print() or saveas(), then the output geometry will be a function of figure geometry instead of strictly being equal to the image geometry, (e.g. with any added padding, etc)

hi = imshow('peppers.png'); % [384 512]

% use print

print('useprint.png','-dpng')

S = imfinfo('useprint.png');

[S.Height S.Width]

ans = 1×2

656 874

% use saveas

saveas(gca,'usesaveas.png')

S = imfinfo('usesaveas.png');

[S.Height S.Width]

ans = 1×2