I would like to ask you how to generate an equalized number of random points in Erdas Imagine 2013 for doing an accuracy assessement.
I did an image difference (thematic layer, produces 5 categories) and than I recoded this .img into 3 categories (change, no change, background), bud Erdas mixed the category "no change" with "background" - so Erdas has produced just 2 categories.
I did the "add/create equalized random points", I selected my classes bud the Erdas didnt generate required number of points and these points were not only in my selected classes. And I would like to create them just in my area of interest (AOI) not in the background. (using of clip tool didnt work and I cant just delete the points with class values "0" because of confusing the background with the categorie "no change"). All the found examples on this questions are just for "add random points" not for this "equalized number in specified AOI.