To extract edges from a binary imag

To extract edges from a binary image, we use a four pixel window in output pattern that keep all pattern except black-black-black-black and white-white-white-white.These patterns don’t include intensity variation and aren’t edge points and neural network returning white-white-white- white (Whitewash) for both. We can also reduce noisy pattern by Whitewash. Noisy patterns contain one black pixel that replace by Whitewash (see TABLE. 1). In Fig.2 output patterns also represented. After the network is trained, it can recognize the input pattern as a most like pattern in our edge pattern bank.