How to store the pixel information of each images in a folder into separate variables?

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Md Farhad Mokter
Md Farhad Mokter 2019-5-28
评论： Md Farhad Mokter 2019-5-28
I have a code that counts black pixels of a given image and stores that in a variable. I want to count and store black pixels from each images of a folder into separate variables.
I = imread('8.JPG');
bw = imbinarize(I);
figure; imshow(bw);
ctr= 0;
for i = 1:224
for j =1:224
if bw(i,j) ==0
ctr = ctr + 1;
end
end
end
How can I implement this code using loop for all the images in a directoy so thati can have a variable that contains numbers of black pixels of each image?

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采纳的回答

Image Analyst
Image Analyst 2019-5-28
How about using save()?
I = imread('8.JPG');
bw = imbinarize(I);
numBlackPixels = nnz(~bw);
folder = 'c:/whereverYouWant';
baseFileName = 'MyData.mat';
fullFileName = fullfile(folder, baseFileName);
save(fullFileName, 'numBlackPixels');
No for loop is needed.
Repeat for all your other images.
See the FAQ for code samples to process a sequence of images: The FAQ
  1 个评论
Md Farhad Mokter
Md Farhad Mokter 2019-5-28
Thank you so much for your quick answer. But I have a large amount of images in the folder and I need to find the ratio of black pixels to other pixels for each image. repeating the process for all images will be hectic Thats why i need variables for each images. I Could not think of other ways. Please let me know if you have better alternatives.

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