How can I display images from image names in a matrix?

Question

Amanda 2016-7-31

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评论： Image Analyst 2020-12-31

Hello,

I'm reading image names into MATLAB from an excel file, and I'd like MATLAB to display the images associated with those image names, but I keep getting error messages when I try to use imread or imshow. All of the image names within the matrix are written as imagename.jpg and the image file is in the same folder as the saved MATLAB code, but I keep getting error messages for syntax.

I'm reading the image files into the matrix, and then trying to create the new variable images, so I can easily call them to display later.

[numbers,imagenames]=xlsread('filename.xlsx')
images=imread(imagenames) %syntax error
images(1:total)=imread(imagenames(1:total)) %syntax error

If someone could please explain how to do this properly I would really appreciate it!

Thank you.

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Answer 1

Image Analyst 2016-7-31

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在 MATLAB Online 中打开

If you want to see all of them at once, in one image, use montage

montage(imagenames);

If you want to see them all in separate figures, you can use subplot and put them in a loop

for k = 1 : length(imagenames)
    thisName = imagenames{k};
    figure;
    imshow(thisName);
end

If imagenames does not include the folder, then you may have to prepend the folder with fullfile().

thisName = fullfile(folder, imagenames{k});

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Answer 2

Azzi Abdelmalek 2016-7-31

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https://ww2.mathworks.cn/matlabcentral/answers/297868-how-can-i-display-images-from-image-names-in-a-matrix#answer_230365

在 MATLAB Online 中打开

[numbers,imagenames]=xlsread('filename.xlsx')
for k=1:numel(imagenames)
 images{k}=imread(imagenames{k})
end

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Uthara Hari 2020-12-31

Hi Amanda, just found an answer to the error: add the image folder to path, and then the code would be able to read all images.

Image Analyst 2020-12-31

But she said "the image file is in the same folder as the saved MATLAB code" so adding the folder name would not be needed in that situation, though I agree it's always best to add it for completeness and robustness.

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