How Can I Solve the imread Error?

Question

Qvna Lhyvnav 2019-5-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/462780-how-can-i-solve-the-imread-error

评论： Qvna Lhyvnav 2019-5-18

I am currently working on a project of flower identification by using RGB color extraction, but I get some errors when I want to read the image files. It said :

Error using imread>get_full_filename (line 516)

File "Image_Folder\Image_Files(n).name" does not exist.

Error in imread (line 340)

fullname = get_full_filename(filename);

Error in Latih (line 8)

Img = imread(fullname);

How can I solve this? Here is my code:

Image_Folder = 'D:\TUGAS KULIAH\PEMODELAN KECERDASAN BUATAN\Tugas Pengganti UAS\Data Latih';
Image_Files = fullfile(Image_Folder,'*.jpeg');
Total_Images = numel(Image_Files);
Training_Data = zeros(3,Total_Images);
for n = 1:Total_Images
    fullname= fullfile('Image_Folder', 'Image_Files(n).name');
    Img = imread(fullname);
    Img = im2double(Img); 
    % RGB Color Extraction
    R = Img(:,:,1);
    G = Img(:,:,2);
    B = Img(:,:,3);
     
    CharR = mean2(R);
    CharG = mean2(G);
    CharB = mean2(B);
    
    Training_Data(1,n) = CharR;
    Training_Data(2,n) = CharG;
    Training_Data(3,n) = CharB;
end

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Answer 1

Walter Roberson 2019-5-18

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https://ww2.mathworks.cn/matlabcentral/answers/462780-how-can-i-solve-the-imread-error#answer_375594

在 MATLAB Online 中打开

Image_Files = dir( fullfile(Image_Folder,'*.jpeg') );

and

fullname= fullfile(Image_Folder, Image_Files(n).name);

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Walter Roberson 2019-5-18

在 MATLAB Online 中打开

In your previous code, Image_Files would have held

'D:\TUGAS KULIAH\PEMODELAN KECERDASAN BUATAN\Tugas Pengganti UAS\Data Latih\*.jpeg'

not a list of files in the folder. numel() of it would be the number of characters in the vector. It would not have a .name field to use with fullfile()

If you are finding that Image_files is empty and Total_images is 0 and n is coming out empty, then the reason for that is that you have no files whose name end with .jpeg inside a folder named D:\TUGAS KULIAH\PEMODELAN KECERDASAN BUATAN\Tugas Pengganti UAS\Data Latih . That could happen if you have a mistake in the name. It could also happen in the situation where the JPEG files are named with .jpg instead of .jpeg .

Qvna Lhyvnav 2019-5-18