1. uvod u digitalnu sliku - Laboratorija za digitalnu obradu signala

x1=imresize(x,[d*3,d*16/3]);
y1=imresize(x1,0.5);
subplot(222)
imshow(y1)
title('{\bfFormat slike 16:9 dobijen razvlacenjem slike}')
[a1 b1 c1]=size(x1);
k=floor((b1-b)/2);
x2(1:a1,b+1:b1,1:c)=uint8(50);
x2(1:a1,1:k,1:c)=uint8(50);
x2(1:a,k:b+k-1,1:c)=x;
y2=imresize(x2,0.5);
subplot(223)
imshow(x2)
title('{\bfPillarbox format}')
a3=floor(b*9/16);
b3=b;
k3=round((a-a3)/2);
x3(1:a3,1:b3,1:c)=x(k3+1:a-k3,1:b3,1:c);
y3=imresize(x3,0.5);
subplot(224)
imshow(y3)
title('{\bfRazvlacenje slike sa gubicima}')
set(figure(1),'Position',[40 200 900 600])
truesize([150 300])
a=imread('1280x720a.jpg');
b=imresize(a,0.5);
figure
subplot(221)
imshow(b)
title('{\bfFormat slike 16:9}')
[p,q,r]=size(a);
d1=gcd(p,q); % q/d:p/d=16:9
p1=9*d1;
q1=12*d1;
k4=round((q-q1)/2);
a11(1:p1,1:q1,1:r)=a(1:p,k4+1:q-k4,1:c);
b11=uint8(imresize(a11,0.5));
subplot(222)
imshow(b11)
title('{\bfFormat 4:3 dobijen odsijecanjem slike}')
set(figure(2),'Position',[40 200 900 600])
truesize([150 300])
[p2 q2 r2]=size(a11);
a31=imresize(a,[p2,q2]);
b31=imresize(a31,0.5);
subplot(223)
imshow(b31)
title('{\bfFormat 4:3 dobijen skupljanjem slike}')
a32=imresize(a,960/1280);
a33(1:p2,1:q2,1:r2)=uint8(50);
[i j l]=size(a32);
k5=round((p2-i)/2);
a33(k5+1:p2-k5,1:q2,1:r2)=a32;
a34=imresize(a33,0.5);
subplot(224)
imshow(a34)
title('{\bfLetterbox format}')
prilog
79