Use imwrite to save processed images to different folder.

Dear all,

I need help with saving processed images to different folder with imwrite.

Currently, I can save all processed images to a single folder.

Img_filename=ls('C:\Users\User\Desktop\Guanlin_CNN1D\CNN1D\GF_BSIF\*.jpg');
imageSize = size(Img_filename);
Img_filenum = size(Img_filename,1);

for  img=1:Img_filenum
     img_temp=double((rgb2gray(imread(Img_filename(img,:))))); 
     -----------processing--------
     count = count+1;
     FileName = fullfile('C:\Users\User\Desktop\Guanlin_CNN1D\CNN1D\GF_BSIF\folder_1',sprintf('%03d_circle_cropped.jpg',count));
     imwrite(MM, FileName)
end

However, I have 1000 different images in 1 folder and after processing, it will generate 500 images and wanted to save the first 500 processed images into folder_1. And the second 500 processed images to folder_2 and the third 500 images to folder_3 and so on...

How to re-write the imwrite function?

Thank you!

Answer 1

[Image Analyst]

folder = sprintf('C:\Users\User\Desktop\Guanlin_CNN1D\CNN1D\GF_BSIF\folder_%3.3d', img);
baseFileName = sprintf('%03d_circle_cropped.jpg', img);
FileName = fullfile(folder, baseFileName);

[Guan-Lin Chen]

Thank you so much!!

[Guan-Lin Chen]

Hi,

Thanks for the help.

I run the code and have an errer:

Warning: Escaped character '\U' is not valid. See 'doc sprintf' for supported special characters.

Could you please help me check?

Thank you!

[Guan-Lin Chen]

one thing I forgot to mention is that I have 1000 different images in 1 folder and after processing, it will generate 500 images and wanted to save the first 500 processed images into folder_1. And the second 500 processed images to folder_2 and the third 500 images to folder_3 and so on...

[Image Analyst]

Either use double backslashes, or use forward slashes. If you're using Windows, Windows handles forward slashes just fine.

[Guan-Lin Chen]

Thank you!

Could you please help me re-write the function?

Since for each process, 500 images will be generate, and I have 1000 images to be processed, which means there will be 1000*500 images in total.

How to save first batch to my first folder_1, and the second batch to my folder_2 and so on and so forth?

[Guan-Lin Chen]

Img_filename=ls('C:\Users\User\Desktop\GF_BSIF\*.jpg'); % has 1000 images
Img_filenum = size(Img_filename,1);
count = 0;    
    for I=1:Img_filenum
        Img = imread(Img_filename(I,:));
        imageSize = size(Img);
        c_row= 50;                 %center of circle row value. DON'T CHANGE
        radius= 50;                %radius of circle
        StepSizeRow= 50;
        StepSizeCol= 50;
            %%
        c_col=50;                  %center of circle column value. CHANGE BY 120
        col_min= c_col-radius+1;    %column val left side of bounding box. CHANGE BY 120
        col_max= c_col+radius;      %column val right side of bounding box. CHANGE BY 120
        [cols, rows, rgb]= size(Img);
    for j =  c_col:StepSizeCol: cols-radius
        row_min=c_row-radius+1;                  %row val top of bounding box. DON'T CHANGE
        row_max=c_row+radius;                    %row val bottom of bounding box. DON'T CHANGE
        for i= c_row:StepSizeRow:rows-radius
            ci = [j, i, radius];                 % center and radius of circle ([c_col, c_row, r]) og size (1920, 2560)
            [xx,yy] = ndgrid((1:imageSize(1))-ci(1),(1:imageSize(2))-ci(2));
            mask = uint8((xx.^2 + yy.^2)<ci(3)^2);
            croppedImage = uint8(zeros(size(Img)));
            croppedImage(:,:,1) = Img(:,:,1).*uint8(mask);
            croppedImage(:,:,2) = Img(:,:,2).*uint8(mask);
            croppedImage(:,:,3) = Img(:,:,3).*uint8(mask);
            sp(1) = col_min;                    %min(floor(p(1)), floor(p(2))); %xmin
            sp(2) = row_min;                    %min(floor(p(3)), floor(p(4))); %ymin
            sp(3) = col_max;                    %max(ceil(p(1)), ceil(p(2)));   %xmax
            sp(4) = row_max;                    %max(ceil(p(3)), ceil(p(4)));   %ymax
            row_min=row_min+StepSizeRow;
            row_max=row_max+StepSizeRow;
            % Index into the original image to create the new image
            MM = croppedImage( sp(1): sp(3),sp(2):sp(4),:);
            %Display the subsetted image with appropriate axis ratio
            count = count+1;
            %FileName = fullfile('C:\Users\User\Desktop\Tensorflow\1cm 0.27H circle cropped',sprintf('Cropped_Parallel_5x_20_400Radius_%d.jpg',count));
            %FileName = fullfile('C:\Users\User\Desktop\GF_BSIF\temp',sprintf('%03d_circle_cropped.jpg',count));
            folder = sprintf('C:\Users\User\Desktop\Guanlin_CNN1D\CNN1D\GF_BSIF\folder_%d',I)
            baseFileName = sprintf('%03d_circle_cropped.jpg', count);
            FileName = fullfile(folder, baseFileName);
            imwrite(MM, FileName)

I try to rewite the function but have error:

Warning: Escaped character '\U' is not valid. See 'doc sprintf' for supported special characters.

> In batch_crop (line 53)

Error using imwrite (line 528)

Unable to open file "C:\001_circle_cropped.jpg" for writing. You might not have write permission.

Error in batch_crop (line 56)

imwrite(MM, FileName)

[Guan-Lin Chen]

Just figure it out!!!

Thank you!!!!