How can i make an array of 100 images ?

2014 12 8
3 个回答
更新时间：2018 2 6
6 次查看（30 天）

0 个投票

I want to perform some feature vector operations on 100 images directly , how can i do that?

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回答（3 个）

Guillaume
Guillaume 2014-12-8

0 个投票

You didn't give enough information to answer in any detail (for example what is the size of the images, how many channels, how are they stored, etc.), so:
If the images are all the same size concatenate them in a new dimension (dim 3 for single channel, dim 4 for RGB) with cat
If they're all different size, use a for loop.

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Himanshu
Himanshu 2014-12-8
They are of different sizes RGB image .....Below is the code
image_folder = 'C:\Users\user 1\Desktop\New folder (2)\my code\rear'; % Enter name of folder from which you want to upload pictures with full path
filenames = dir(fullfile(image_folder, '*.png')); % read all images with specified extention, its jpg in our case total_images = numel(filenames); % count total number of photos present in that folder
for n = 1:total_images
full_name= fullfile(image_folder, filenames(n).name); % it will specify images names with full path and extension
our_images = imread(full_name); % Read images
figure (n) % used tat index n so old figures are not over written by new new figures
imshow(our_images) % Show all images
end
Guillaume
Guillaume 2014-12-8
Change your loop to:
files = dir(fullfile(image_folder, '*.png')); %filename as a variable name is not accurate
total_images = numel(filenames)
for n = 1:total_images
our_images{n} = imread(fullfile(image_folder, file.name));
feature{n} = your_feature_code(our_images{n});
%display code if you wish
%...
end
This assumes your_feature_code returns something else than a scalar. If it returns a scalar you can replace the {} with ()
amara zafar
amara zafar 2018-2-6
my images arre in tiff format does it work same way
Walter Roberson
Walter Roberson 2018-2-6
Yes, you can use imread() with tif images. However, tif can store multiple images in the same file, so in some circumstances you might need to take extra steps.

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Himanshu
Himanshu 2014-12-8

0 个投票

image_folder = 'C:\Users\user 1\Desktop\New folder (2)\my code\rear'; % Enter name of folder from which you want to upload pictures with full path
filenames = dir(fullfile(image_folder, '*.png')); % read all images with specified extention, its jpg in our case total_images = numel(filenames); % count total number of photos present in that folder
for n = 1:total_images
full_name= fullfile(image_folder, filenames(n).name); % it will specify images names with full path and extension
our_images = imread(full_name); % Read images
figure (n) % used tat index n so old figures are not over written by new new figures
imshow(our_images) % Show all images
end
Stalin Samuel
Stalin Samuel 2014-12-8
编辑：Stalin Samuel 2014-12-8

0 个投票

for example if u have images named as 1.jpg,2.jpg,....n.jpg then
for i = 1:no_of_images currentimage = imread( sprintf('ur_image directory_folder/%d.JPG',i) ); //your feature calculation feature(i)=your calculation end

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