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How does the following code works?

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Dhanubala A
Dhanubala A 2018-2-19
关闭： MATLAB Answer Bot 2021-8-20
r_idx = random('unid', size(listing, 1));
im_input = imread(strcat('D:\project\CVPR17_training_code\data_generation\image\input\', listing(r_idx).name));
I found this code .But ,I couldn't understand how the random() and size() function works.Please explain this...
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Dhanubala A
Dhanubala A 2018-2-19
When i run your code,the following error occurs. "Error using imread (line 349) File "D:\project\CVPR17_training_code\data_generation\image\label\931_4.jpg" does not exist.
Error in generate_train (line 31) im_label = imread(strcat('D:\project\CVPR17_training_code\data_generation\image\label\', listing(r_idx).name)); % label: clean image"
Walter Roberson
Walter Roberson 2018-2-19
As an outside person, I have no reason to expect that you have given the correct path to the files.
You should learn how to use fullfile()
projectdir = 'D:\etc'
listing = dir( fullfile(projectdir, '*.jpg'));
ridx = randi(length (listing))
thisfile = fullfile (projectdir, listing(ridx).name));
imread(thisfile)

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