How can I control the output image pixel size using only the PRINT command?

I need to have a specific pixel resolution in my output image. I do not have the image processing toolbox, and therefore can not use the IMRESIZE command.

Answer 1

[MathWorks Support Team]

You can do this by manipulating the PAPERPOSITION property and the resolution switch in the PRINT command.

surf(peaks)

% control the image pixel size by manipulating the paper size and number of dots per inch
output_size = [500 300];%Size in pixels
resolution = 300;%Resolution in DPI
set(gcf,'paperunits','inches','paperposition',[0 0 output_size/resolution]);

% use 300 DPI
print('test.png','-dpng',['-r' num2str(resolution)]);

% now read the image back in to MATLAB and test its size
a=imread('test.png');
size(a)