I am doing a project in order to recognize an apple. (I am using Emgucv with Visual Studio 2010 C#, if that's relevant). My project is a classification (is or is not an apple). I have 2000 images of apples but I need images for the second class.
I have read about classification using ANN but they have multiple classes but I need to recognize if image contain an apple or not. So what kind of images do I need for the second classes? I want to use background of apples like second class. Is that a good idea?
I only want that ANN recognize if a image contain a pen or not so I have 2 classes(pen and non-pen) My question is What kind of image can I use to the second class? For example My first class are images of pen and second class are images of non pen (pencil, apples, grapes, tables); is that correct?