How do I save multiple images after converting them?

Question

Vinay Chawla 2020-12-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/694645-how-do-i-save-multiple-images-after-converting-them

评论： Vinay Chawla 2020-12-15

Hello,

I am trying to apply Median filter on a set of image data (50 Images) and I was wondering if someone can help me with the code to save each image after coonversion. I am using the following code and tool 'imsave' to save the images, but it is giving me an error

D = 'C:\Users\ChawlaV\Desktop\MATLAB\CNN Input 2\Alligator Cracks';
S = dir (fullfile(D,'*.png'));
for k = 1: numel(S);
    F = fullfile (D, S (k).name);
    I = imread (F);
    grayImage = rgb2gray(I);
    MFImage = medfilt2(grayImage);
    path = ('C:\Users\ChawlaV\Desktop\MATLAB\CNN MF\Alligator Cracks'\'*.png*');
    imsave(MFImage);
    figure, imshow (MFImage);
end

%% ERROR

Thank you,

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Answer 1

Image Analyst 2020-12-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/694645-how-do-i-save-multiple-images-after-converting-them#answer_576400

在 MATLAB Online 中打开

Don't use imsave(). And don't use path as the name of the variable - it's a very important built in global variable.

Try it this way, which has tons of improvements (like better variable names, using imwrite(), etc.).

inputFolder =  'C:\Users\ChawlaV\Desktop\MATLAB\CNN Input 2\Alligator Cracks';
outputFolder = 'C:\Users\ChawlaV\Desktop\MATLAB\CNN MF\Alligator Cracks';
fileListing = dir (fullfile(inputFolder,'*.png'));
for k = 1: numel(fileListing)
	% Get the input filename.
	inputFullFileName = fullfile (inputFolder, fileListing(k).name);
	% Read in the original image from disk.
	grayImage = imread (inputFullFileName);
	% Display the image
	subplot(1, 2, 1);
	imshow(grayImage);
	% Check to see if it's grayscale, like it should be.
	if ndims(grayImage) == 3
		% It's color.  Need to convert it to gray scale.
		grayImage = rgb2gray(grayImage);
	end
	% Median filter the image.
	MFImage = medfilt2(grayImage);
	% Display the image
	subplot(1, 2, 2);
	imshow(MFImage);
	drawnow; % Force update.
	% Save the image to the output folder.
	fullFileName = fullfile(outputFolder, fileListing(k).name);
	imwrite(MFImage, fullFileName);
end