How to plot histogram of multiple images in a for loop and save them in different figures?

Question

Penny13 2019-4-1

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/453613-how-to-plot-histogram-of-multiple-images-in-a-for-loop-and-save-them-in-different-figures

回答： mehedi Hasan 2019-11-1

Hello,

I have 20 images in a directory. I want to plot histogram for each image in a for loop and then store the histogram (each in a seperate figure) in a folder. This is the code that I wrote but it does not generate histogram.Could you guide me how to do that?

Thanks

srcFile = dir('./Registered_to_1_Metastatic8 copy 2/*.jpg');
for k = 1 :length(srcFile)
    nextFilename = strcat('./Registered_to_1_Metastatic8 copy 2/',srcFile(k).name);
    next_An_Img = imread(nextFilename);
    An_gray_Img = rgb2gray(next_An_Img);
     figure
     imshow(An_gray_Img )
     figure
     h = imhist(An_gray_Img );
     imwrite(h,['histo' num2str(k) '.jpg'],'jpg');
end

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Penny13 2019-4-1

Thank you so much. It worked. Your answered this question in the comments section not in the Answers , so I could not figure it out how to accept the answer.

KSSV 2019-4-1

I have given in answer now.

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Answer 1

KSSV 2019-4-1

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/453613-how-to-plot-histogram-of-multiple-images-in-a-for-loop-and-save-them-in-different-figures#answer_368386

在 MATLAB Online 中打开

Wait for some time....if your images are huge..it will take some time to get plotted.

srcFile = dir('./Registered_to_1_Metastatic8 copy 2/*.jpg');
for k = 1 :length(srcFile)
    nextFilename = strcat('./Registered_to_1_Metastatic8 copy 2/',srcFile(k).name);
    next_An_Img = imread(nextFilename);
    An_gray_Img = rgb2gray(next_An_Img);
    figure
    imshow(An_gray_Img )
    figure
    imhist(An_gray_Img );
    %   imwrite(h,['histo' num2str(k) '.jpg'],'jpg');
    saveas(gcf,['histo' num2str(k) '.jpg'])
end