how to expang an image

i am working on "Center Point Determination & Cropping",wen i divide the image into blocks of 8*8,the image appears too small on screen,how to enlarge it,can anyone help me please

[Jan]

Please explain any details. Dividing the image into block do not display *anything* on the screen, and in cosnequence it cannot be dispalyed too small. Please post the code, hwich you use for displaying.

[Pat]

MY CODES

% imshow(IMGcells)

% I=imread('1.tif');

% [r c]=size(I);

% bs=8; % Block Size (8x8)

%

% nob=(r/bs)*(c/bs); % Total number of 8x8 Blocks

%

% % Dividing the image into 8x8 Blocks

% kk=0;

% for i=1:(r/bs)

% for j=1:(c/bs)

% Block(:,:,kk+j)=I((bs*(i-1)+1:bs*(i-1)+bs),(bs*(j-1)+1:bs*(j-1)+bs));

% end

% kk=kk+(r/bs);

% end

%

% % Accessing individual Blocks

% figure;imshow(Block(:,:,1)) % This shows u the fist 8x8 Block in a figure window

% figure;imshow(Block(:,:,2)) % This shows u the second 8x8 Block (i.e as per my %coding rows from 1:8 and col from 9:16) in a figure window and so on.....

THE TWO FIGURES ARE DISPALYED ARE VERY SMALL,CAN U HELP PLEASE

[Walter Roberson]

See Sean's answer, or switch to using image() instead of imshow and then read my answer.

[Walter Roberson]

By the way, your line

Block(:,:,kk+j)=I((bs*(i-1)+1:bs*(i-1)+bs),(bs*(j-1)+1:bs*(j-1)+bs));

can be written more efficiently as

Block(:,:,kk+j)=I((bs*(i-1)+1:bs*i),(bs*(j-1)+1:bs*j));

There are additional efficiencies that can be used as well.

Answer 1

[Walter Roberson]

Changing the axes limits via xlim() and ylim() will make the image appear larger or smaller.

Answer 2

[Sean de Wolski]

Look at the 'InitialMagnification' option in both imshow and imtool