How do I perform time lapse image acquisition and save individual images?

Question

MathWorks Support Team 2017-9-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/357424-how-do-i-perform-time-lapse-image-acquisition-and-save-individual-images

编辑： MathWorks Support Team 2021-2-25

采纳的回答： MathWorks Support Team

I want to perform time-lapse image acquisition, saving each acquired frame as a separate image.

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Answer 1

MathWorks Support Team 2021-3-5

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/357424-how-do-i-perform-time-lapse-image-acquisition-and-save-individual-images#answer_282275

编辑：MathWorks Support Team 2021-2-25

Follow a modified form of the approach example is this example:

https://www.mathworks.com/help/imaq/creating-time-lapse-video-using-a-noncontiguous-acquisition.html

Instead of logging to disk, log data to memory. Use the FramesAcquiredFcn callback to save individual frames as images:

​vid = videoinput('winvideo');
%% Do actual time-lapse acquisition
framerate = 17.5296; % Previously calculated according to example
capturetime = 30;
vid.FrameGrabInterval = 10;
vid.FramesPerTrigger = floor(capturetime * framerate / vid.FrameGrabInterval);
vid.FramesAcquiredFcnCount = 1; % Execute callback for each frame
vid.FramesAcquiredFcn = @saveFrame;
start(vid);
wait(vid, Inf);
function saveFrame(vid, event)
    image = getdata(vid, 1);
    imwrite(image, [num2str(vid.FramesAcquired) '.jpg']);
end