How to change width and height of image?

Hey, I'm trying to reduce the size of the height and width of an image only if the image width or height is over 400 pixels. Anybody know how I can do that? Here's the code:

im = imread('harry.jpg');

info = imfinfo('harry.jpg');

hoyde = info.Height;

bredde = info.Width;

if hoyde > 400 bredde > 400

    nyhoyde = hoyde/2;
    nybredde = bredde/2;
    [nyhoyde,nybredde,kanaler] = size(im);

end

Answer 1

[Image Analyst]

Not sure I understand the language you used, but I'd do it like this:

reductionFactor = 0.5; % whatever...
[rows columns numberOfColorChannels] = size(im);
if rows>400 || columns > 400
  im = imresize(im, reductionFactor);
end

[andrew_cup]

Thank you! :-)

Answer 2

[Thomas]

im = imread('harry.jpg');

info = imfinfo('harry.jpg');

hoyde = info.Height;

bredde = info.Width;

if hoyde > 400 ||  bredde > 400   %if rows or columns have more than 400px

     iq=imresize(im,0.5);   % reduce by factor 1/2=0.5

end

figure
imshow(im)    % actual image
figure
imshow(iq)    % reduced image