Condition on the last last frame of a video

Question

sarah Abdellahi 2018-11-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429469-condition-on-the-last-last-frame-of-a-video

回答： Guillaume 2018-11-12

采纳的回答： Guillaume

在 MATLAB Online 中打开

Hello experts,

I extracted the frames of a video and are visible in the current folder (left column in matlab). I have 168 frames.

Before doing any analysis on the image, I want to put a condition on the last frame in the folder. The following code descirbes what I do.

RGB=imread('168.jpg');
I_gray= rgb2gray(RGB) ;
I_binrzd= imbinarize(I_gray,'global');
stats=regionprops('table',I_binrzd,'area');
C1=max(stats.area);
if C1>200
    fprintf('SOFT');
end

Now I want Matlab to automatically imports the last frame and check the condition instead of me, saying 168! something like RGB=imread('end.jpg') !

Suggestions?

Thank you

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Answer 1

Guillaume 2018-11-12

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https://ww2.mathworks.cn/matlabcentral/answers/429469-condition-on-the-last-last-frame-of-a-video#answer_346573

在 MATLAB Online 中打开

Well, you need to ask the filesystem for the list of files, extract the file numbers from that list then select the greatest one, so:

filelist = dir('*.jpg'); %get list of files
filenumber = arrayfun(@(file) sscanf(file.name, '%d', 1), filelist);  %extract file number
[~, selectedindex] = max(filenumber); %select greatest number
RGB = imread(filelist(selectedindex).name);
%... rest of your code