Lab1 - AI

img = imread('football.jpg');
%figure; imshow(img)
A = imresize(rgb2gray(img), [100, 100]);
%figure, imshow(A)

%1.2
%a)
x=sort(A(:)); %vectorizarea matricei

%figure; plot(x);

%b)histograma
%figure; hist(double (A(:)),32);

%c) 50x50 colt dreapta sus
c = A(1:50, 51:100)
colt = A(size(A,1)/2+1:end, size(A,2)/2+1:end);
%figure; imshow(colt)
%figure; imshow(c)

%d)
t = median(A(:))

%e)
B = ones(size(A))*255;
B(A<t) = 0;

%figure; imshow(B)

%f)
medie = mean (A(:));
C = A-medie;
C(C<0)=0;
%figure, imshow(C)

%g)
min(A(:))
%[L, C] = find(A == min(A(:)))

%1.3
close all
dirPath = 'D:\Ghinea Alexandru George\colectiiImagini\colectiiImagini\set1\'
[ imgColor, imgGray, X ] = colectieImagini(dirPath);




EX 1.3
function [ imgColor, imgGray, X ] = colectieImagini(dirPath)

filelist = dir([dirPath '*.jpg']);

imgName = [dirPath filelist(1).name];
nextImg = imread(imgName);
imgGray = zeros(size(rgb2gray(nextImg)));
imgColor = zeros(size(nextImg));

cG = zeros(size(rgb2gray(nextImg)));
cR = zeros(size(rgb2gray(nextImg)));
cB = zeros(size(rgb2gray(nextImg)));

for idxImg = 1:length(filelist)
imgName = [dirPath filelist(idxImg).name];
nextImg = imread(imgName);
nextImgGray = rgb2gray(nextImg);

%pentru calculul imaginii imgGray
imgGray = imgGray + double(nextImgGray);

%pentru calculul imaginii imgColor

cR = cR + double(nextImg(:,:,1));
cG = cG + double(nextImg(:,:,2));
cB = cB + double(nextImg(:,:,3));

end
cR = cR / length(filelist);
cG = cG / length(filelist);
cB = cB / length(filelist);

imgColor(:,:,1)= cR;
imgColor(:,:,2)= cG;
imgColor(:,:,3)= cB;

imgGray = imgGray/length(filelist)

imgColor = 1;
imgGray = 1;
X = 1;
end