Assignment #10

Assignment #9

Assignment 8 (A start)

Assignment #7

function smallimage=shrink2(largeimage,f);

Mp=floor(size(largeimage,1)*f-1);
Np=floor(size(largeimage,2)*f-1);

smallimage(:,:,1)=zeros(Mp-1,Np-1);
smallimage(:,:,2)=zeros(Mp-1,Np-1);
smallimage(:,:,3)=zeros(Mp-1,Np-1);


for i=1:(Mp-1)
for j=1:(Np-1)

a=round(i/f);
b=round(j/f);
smallimage(i,j,:)=largeimage(a,b,:);
end;
end;
endfunction;



A=imread("image.jpg");

B=shrink2((double(A)/255),f);
function smallimage=shrink3(largeimage,f)


Mp=floor(size(largeimage,1)*f);
Np=floor(size(largeimage,2)*f);

smallimage(:,:,1)=zeros(Mp-1,Np-1);
smallimage(:,:,2)=zeros(Mp-1,Np-1);
smallimage(:,:,3)=zeros(Mp-1,Np-1);


for i=1:(Mp-1);
for j=1:(Np-1);
a=i/f;
b=j/f;

r=floor(a);
s=floor(b);

for k = 1:3;

smallimage(i,j,k)=[1-a+r, a-r]*double([largeimage(r,s,k),largeimage(r,s+1,k);largeimage(r+1,s,k),largeimage(r+1,s+1,k)])*[1-b+s;b-s];

end;
end;
end;
endfunction;



A=imread("image.jpg");

B=shrink3((double(A)/255),0.75);

Assignment #6-question 3

Assignment 6 - 3 b)


pkg load image

cd 'C:\pictures'
A=imread("Rainbow.jpg");
B=double(A)/255;
size(B)

ans =
109 200 3

aveB=sum(sum(B))/109/200

ans(:,:,1)=0.56770
ans(:,:,2)=0.34527
ans(:,:,3)=0.30058


aveB(:,:,1)=0.56770
aveB(:,:,2)=0.34527
aveB(:,:,3)=0.30058

imshow(aveB)


6 -3 b)

Find the average colour of two images from the web.

C=imread("green.jpg");
D=double(C)/255;
imshow(D)
size(D)

ans =
110 160 3

aveD=sum(sum(D))/110/160

ans(:,:,1)=0.46077
ans(:,:,2)=0.66349
ans(:,:,3)=0.069944


aveD(:,:,1)=0.46077
aveD(:,:,2)=0.66349
aveD(:,:,3)=0.069944

imshow(aveD)


E=imread("blue.jpg");
F=double(E)/255
imshow(F)
size(F)
ans =

106 160 3

aveF=sum(sum(F))/106/160

ans(:,:,1)=0.24725
ans(:,:,2)=0.35670
ans(:,:,3)=0.76474


aveF(:,:,1)=0.24725
aveF(:,:,2)=0.35670
aveF(:,:,3)=0.76474
imshow(aveF)

When the original image is predominately one colour, the average colour is similar. When the original image has many colours, the average colour is less predictable.