i want to write a SImple code to delete frames of a video(simple video with static background) which are below a threshod level??

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Ankur Singh 2014-1-8

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回答： Image Analyst 2014-1-9

please help me..i m getting error..

i have a simple video with static backround..first there is no motion ...after 5 sec there is a motion for 5 sec...again there is no motion..so i just want to keep the frames where there is motion using threshold...

i think..when there is no motion..it will have diff value than when there is motion

please help me to get started

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Answer 1

Image Analyst 2014-1-9

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https://ww2.mathworks.cn/matlabcentral/answers/111823-i-want-to-write-a-simple-code-to-delete-frames-of-a-video-simple-video-with-static-background-which#answer_120369

ExtractMovieAVIFrames.m

Just subtract the frames and retain only those where the sum of the difference image is more than some specified amount. See my attached demo below in blue text.

% Demo macro to extract frames and get frame means from an avi movie
% and save individual frames to separate image files.
% Then rebuilds a new movie by recalling the saved images from disk.
% Also computes the mean gray value of the color channels
% And detects the difference between a frame and the previous frame.