is it possible to make an image in GUI matlab which is not predefine but define by user input?

is it possible to make an image in GUI matlab which is not predefine but define by user input?

Answer 1

[Walter Roberson]

n = input('how big a square do you want?');
v = input('how bright do you want, 0-255');

MyImage = zeros(n,n,'uint8');
MyImage(:) = v;

image(MyImage);
colormap(gray(256))

[Walter Roberson]

http://www.mathworks.com/help/matlab/ref/image-properties.html ButtonDownFcn callback, together with get(gcf,'CurrentPoint')

Or use ginput(). Or datacursormode