1 wyswietlenie,przyciemnienie
a = imread ('maki.jpg');
figure (1);
subplot(2,2,1);
image(a);
b = a;
b=double(b);
c= input ('Podaj wartosc przyciemnienia: ')
b= b-c;
subplot(2,2,2);
b=uint8(b);
image(b);

2
a= imread('maki.jpg');
a= double(a);
figure (1);
subplot(2,2,1);
a=uint8(a);
image(a);
b=a;
r=b(:,:,1);
g=b(:,:,2);
b=b(:,:,3);
b=0.299*r+0.587*g+0.114*b;
subplot(2,2,2);
image(b);
czarno=0.299*r+0.587*g+0.114*b;
czarno=uint8(czarno);
[m,n]=size(czarno);
p=80;
for i=1:m
    for j=1:n
        if czarno(i,j)<=p
            czarno(i,j)=0;
        else
        end
    end
end
czarno(i,j)=255;
colormap(gray(256));
subplot(2,2,3);
image(czarno);

3 zmiana koloru
close all;
clear all;
d=imread('maki.jpg');
image(d);
[y x] = ginput(1);
x=floor(x);
y=floor(y);
punkt=d(y,x,:);
figure(2);
image(punkt);

4
clear all;
img = imread('maki.jpg');
kolum = size(img, 1);
wiersz = size(img, 2);

img2 = zeros(kolum + 30, wiersz +30, 3);
for i=1:kolum+30
    for j = 1:wiersz+30
        img2(i,j, 2) = 255;
    end
end

for  i = 16:kolum+15
    for j = 16:wiersz +15
        img2( i, j, :) = img(i-15, j-15, :);
    end
end
img2 = uint8(img2);
figure(1);
image(img2);