You can create a cell array that holds all the image matrices. Use a for loop to imread each image and then store it in a cell array, in each iteration:
%cell array of your image filepaths
allFilenames = {"0001.png", "0002.png", "0003.png"};
%empty cell that will store all the images
allImages = cell(length(allFilenames),1);
%for loop to imread each image from the the allFilenames cell array and store it in allImages cell array
for i = 1:length(allFilenames);
allImages{i} = imread(allFilenames{i});
end
