how to get image from specific folder and resize each image and save them is a new folder

Question

Awais Khan 2019-5-27

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464141-how-to-get-image-from-specific-folder-and-resize-each-image-and-save-them-is-a-new-folder

回答： Rik 2019-5-27

i try below code, but it show error at 'thisimage' variable. whats the problem.

clc;
close all;
clear;
OutputFolder = 'D:\Datasets\handwritten-signatures\sample_Signature\edited';  % Set as needed [EDITED]
dinfo = dir('D:\Datasets\handwritten-signatures\sample_Signature\genuine\*.png');% image extension
for K = 1 : length(dinfo)
  thisimage = dinfo(K).name;
  Img   = imread(thisimage);
  Y     = imshow(Img);
  Gray  = rgb2gray(Img);
  i = imresize(Img, [227, 227], 'bilinear');
  imwrite(i, fullfile(OutputFolder, thisimage));  % [EDITED]
end

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Jan 2019-5-27

"it show error at 'thisimage' variable" - please post the complete error message. For solving a problem it is important to know, what the problem is.

Awais Khan 2019-5-27

在 MATLAB Online 中打开

Error using imread>get_full_filename (line 516)
File "NFI-00101001.png" does not exist.
Error in imread (line 340)
    fullname = get_full_filename(filename);
Error in resizing_dataset_images (line 9)
  Img   = imread(thisimage);

above error show as a result of above provide code. but in data set file with this name exist.

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Answer 1

Murugan C 2019-5-27

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464141-how-to-get-image-from-specific-folder-and-resize-each-image-and-save-them-is-a-new-folder#answer_376745

编辑：Rik 2019-5-27

在 MATLAB Online 中打开

HI,

Before reading the image (imread), you shoud change directory, where the files are present, as like as below

clc;
close all;
clear;
OutputFolder = 'D:\Datasets\handwritten-signatures\sample_Signature\edited';  % Set as needed [EDITED]
dinfo = dir('D:\Datasets\handwritten-signatures\sample_Signature\genuine\*.png');% image extension
for K = 1 : length(dinfo)
    thisimage = dinfo(K).name;
    cd 'D:\Datasets\handwritten-signatures\sample_Signature\genuine\'
    Img   = imread(thisimage);
    cd ..
    Y     = imshow(Img);
    Gray  = rgb2gray(Img);
    i = imresize(Img, [227, 227], 'bilinear');
    imwrite(i, fullfile(OutputFolder, thisimage));  % [EDITED]
end

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Murugan C 2019-5-27

Refer below link also.

https://in.mathworks.com/matlabcentral/answers/460320-how-to-change-image-format

Rik 2019-5-27

You shouldn't be using cd in your functions. imread will accept a full path without requiring the current folder to be changed. Also, why are you using clc,close all,clear? Most of the times that is cargo cult programming. (and you should use the layout tools to make your code more readable)

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Answer 2

Rik 2019-5-27

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464141-how-to-get-image-from-specific-folder-and-resize-each-image-and-save-them-is-a-new-folder#answer_376757

在 MATLAB Online 中打开

This is how you can provide the full path to imread:

for K = 1 : length(dinfo)
  thisimage = dinfo(K).name;
  Img   = imread(fullfile(dinfo(K).folder,thisimage));
  Y     = imshow(Img);
  Gray  = rgb2gray(Img);
  i = imresize(Img, [227, 227], 'bilinear');
  imwrite(i, fullfile(OutputFolder, thisimage));
end