How to select only first picture from a given file using GUI, then use variables from one function in another???

Hi everyone,

I have a pushbutton in a gui and I want to use the 'uigetdir' function, or something similar, to make it load ONLY the first image from a file. I then want to use the 'roipoly' function on this picture. So is there a way something like Image = uigetdir(roipoly(1)); ???

Also, when I have used this roipoly function I will be left with the points that have been clicked on in the image (xi, yi etc..). If I save these values as xMin = min(xi) and yMin - min(yi) etc then how can I use these variables in another function?

So how can I get another pushbutton to the call these values to be used in that part of the code?

Many thanks for all your help,

Ellis

Answer 1

[Walter Roberson]

[filename, pathname] = uigetdir('Select an image');
thisfile = fullfile(pathname, filename);
myimage = imread(thisfile);
roi = roipoly(myimage);

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F