Displaying random image from array of file names

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Alisha Arshad
Alisha Arshad 2018-4-7
回答： Image Analyst 2018-4-8
I am trying to figure out how to take an array of png image files and then have MATLAB randomly select one of the file names and then display it.
For example we have an array called red_shirts with 4 png files listed across the first row (4x1). We really have no idea how to go about solving this issue. Any help would be extremely appreciated!!!
We tried:
x=1:length(red_shirts)
y=rand(x)
n=imread(red_shirts(y).name);
imshow('n');
end

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采纳的回答

Image Analyst
Image Analyst 2018-4-8
Try this:
red_shirts = dir('*.png');
numberOfImages = length(red_shirts)
randomIndex = randi(numberOfImages)
randomImage = imread(red_shirts(randomIndex).name);
imshow(randomImage);

更多回答（1 个）

David Fletcher
David Fletcher 2018-4-7
编辑：David Fletcher 2018-4-7
I have no idea what structure you have your image file names stored in, so I can only give an example of something that does work (with the file names stored in a basic cell array):
red_shirts=[{'one.png'} {'two.png'} {'three.png'} {'four.png'}]
y=randi([1 length(red_shirts)]])
image=imread(red_shirts{y});
imshow(image)
  1 个评论
Image Analyst
Image Analyst 2018-4-8
Since red_shirts is a structure with a "name" field, it came from calling the dir() function.

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