Hopfield neural network (HNN) is a well-known bio-inspired,
recurrent neural network given by Tank and Hopfield
in the year 1982 [ 12],[ 13]. HNN behaves as a content
addressable memory i.e. it can retrieve a stored face even if a
subset of the fundamental stored face is given. The operation of
HNN has two phases, the storage phase and the retrieval phase.
All the neurons in HNN are connected to all other neurons by a
symmetric weight matrix W. Hebb rule [ 12], [ 13], [ 14], [ 15]
determines the weight matrix. There are generally two types of
retrieval, synchronous retrieval and asynchronous retrieval. In
this paper, we use a modified retrieval algorithm CHNN [ 16].