Controlling where the image is displayed is easy

In most cases, you will be very happy with the way Matlab displays images. But if you are like me, who likes to display images in a predetermined position you may want to read further.


% Lets read the image of lenna in the matrix A

A=imread('lenna.jpg');

figure; % this opens up a new figure. 

imshow(A); % Displays the image A

This will display the image. But if you want to control the position of your image on your computer screen you can try playing with the code below.

figure;

screen_size=get(0,'screensize') 

% this is your computer's screen % size 

screen_width=screen_size(3); % width of the screen

screen_height=screen_size(4); % height of the screen

figure_width=screen_size(4)/2; % width of the figure

figure_height=screen_size(4)/2; % height of the figure

x_lowerbottom=(screen_width-figure_width)/2;

y_lowerbottom=(screen_height-figure_height)/2;

set(gcf,'position',[x_lowerbottom y_lowerbottom figure_width figure_height]);

imagesc(A);

colormap('Gray');

For my computer the command screen_size=get(0,'screen size')  displays the following in the command window.

screen_size =

           1           1        1680        1028

Here (1, 1) are the co-ordinates of the left bottom point of the screen and (1680, 1028) is the top-right point. 


In the above code (x_lowerbottom, y_lowerbottom) is the co-ordinate of the point on the screen where your figure's lower bottom point will be displayed! 


This is confusing a bit. But don't worry, unless you are a control freak like me, you may never be using this ... ever!