How to create database of 320 images in matlab? for signature verification system how to extract surf features and how to store them?

MathWorks

I = imread('C:\Users\LENOVO\Desktop\MATLAB\Database2\Preprocessed\forged\1\1.1.png');
 
 %Find and extract features.
 points = detectSURFFeatures(I);
 [~, valid_points] = extractFeatures(I, points);
  
  %Display and plot ten strongest SURF features.
  figure; imshow(I); hold on;
  plot(valid_points.selectStrongest(100),'showOrientation',true);

Answer 1

[KSSV]

files = dir('*.png')
N = lenght(Files) ;
for i = 1:N
    I = imread(files(i).name)
    %Find and extract features.
    %  points = detectSURFFeatures(I);
    %  [~, valid_points] = extractFeatures(I, points);
    %Display and plot ten strongest SURF features.
    %   figure; imshow(I); hold on;
    %   plot(valid_points.selectStrongest(100),'showOrientation',true);
   
end

[Regina N]

files = dir('*.png')

N = lenght(Files) ;

for i = 1:N

I = imread(files(i).name)

Is this sufficient for creating database.....bcoz i m new to matlab plz explain me this code

[KSSV]

files = dir('*.png')   ;  % this will get all the files with extension .png in the present folder
N = length(files) ;   % total number of files/ images
for i = 1:N    % loop for each image
    I = imread(files(i).name) ;  % read the present i'th image
end

[Regina N]

Is this code hepl to read the image from database....i have run this code...and it only read the image....bt i want to create the database...plz sir suggest me something related to that

[KSSV]

Reas about imageDatastore

https://in.mathworks.com/help/matlab/ref/matlab.io.datastore.imagedatastore.html