How to read multiple jpg images in matlab

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djamaleddine djeldjli 2017-1-20

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https://ww2.mathworks.cn/matlabcentral/answers/321305-how-to-read-multiple-jpg-images-in-matlab

评论： djamaleddine djeldjli 2017-1-21

采纳的回答： Niels

i have 250 jpg images stored at in_dir = 'C:\Users\DJDJ\Desktop\pic';

these pictures are arranged as following and named : image1 , image2, image3.....image250

I want to read all these images and processing them starting by image1 after processing go to process image2 .and after image3.to..image250

then saved the resultant images after preproceesing in a specific file,for example at out_dir = 'C:\Users\DJDJ\Desktop\pic output';.

How can i do this in matlab?

thank you in advance

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Niels 2017-1-20

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编辑：Niels 2017-1-20

在 MATLAB Online 中打开

you can use a for loop and save the image data in a cell:

replace png by the file type of your images. result will be a 1x250 cell array

for i= 1:250
    x{i}=imread(['image',num2str(i),'.png'])
end
>> save('image_Data','x')

You need to use exist() to verify that the file exists first. Also, splitting up long lines into multiple lines would make things simpler. Because of that, I can see that you totally ignored my answer to use the code in the FAQ and used your own code, thus causing your problems. I urge you to again look at the FAQ and see what it's doing that you aren't, and then the code will work.

djamaleddine djeldjli 2017-1-21

Thank you very much for your assistance.Now,it's working well.

I have replaced line 11 by current_image = imread(fullfile(in_dir, fname));

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Image Analyst 2017-1-21

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You would use the first code sample in this entry of the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

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Maitham 2017-1-21

Hi Image Analyst. Sorry maybe my comment has not related to this topic. I need your help please with Strehl Ratio. I have a point source image and need to find and draw the Strehl Ratio for it. I would high appreciate it if you could help me please. Very kind regards Maitham