d1) Neural Networks (Cont.4)
Procedure for collecting non-face patterns: (bootstrap technique).
1. Create an initial set of non-face images by generating 1000 images with random pixels intensities.
2. Train a neural network to produce output +1 (face patterns) and -1 (non-face patterns).
3. Run the system on an image which contains no faces; Collect subimages in which the network wrongly identifies a face (output +1).