Load bunch of image from folder s

hi,

i have a bunch of people face image. each image have 32*32 pixel. each people face have 10 images (its name 1.bmp - 10 bmp) and i have 40 different people face sample. every image of a person's face is placed in one folder so I have 40 folders (also name the folder with number "1" - "40". all of these folders are placed in 1 main folder with the name "orlface".

and i want to change every image to matrix of [1024*1] for 1 image and [1024*200] for all image.

is it possible?

thanks

Answer 1

[Vidhi Agarwal]

Hi @Krishna Subiyanto

You can achieve this using MATLAB. Below is a step-by-step guide and sample code to help you accomplish this task:

• Read each image from the folders and convert the image to a grayscale matrix if it isn't already.

% Loop through each person's folder and Loop through each image in the person's folder 
% Read the image 
img = imread(imgFileName); 
% Convert to grayscale if necessary using
img = rgb2gray(img); 

• Flatten each image matrix (32x32) into a vector (1024x1).

% Flatten the image matrix to a vector 
imgVector = reshape(img, [1024, 1]); 

• Store each vector in a larger matrix (1024x200) where each column represents a flattened image.

% Store the vector in the appropriate column
allImagesMatrix(:, imageCounter) = imgVector; 

• Loop through each folder and image to process them.

% allImagesMatrix now contains all images as column vectors 
disp(size(allImagesMatrix)); % Should display [1024, 200] 

For in depth understanding of Flattening, refer to the following documentation:

• https://www.mathworks.com/help/matlab/ref/double.reshape.html

Hope that helps!