Algorithms 2 Ant colony optimization 2 Artificial intelligence 2 Binary ant colony optimizations 2 Binary optimization 2 Binary particle swarm optimization 2 Bins 2 Character recognition 2 Classification (of information) 2 Feature extraction 2 Fish 2 Fish school searches 2 Handwritten digit recognition 2 Optimization 2 Particle swarm optimization (PSO) 2 Pattern recognition 2 Support vector machines 2 Wavelet transforms 2 advanced binary ant colony optimization 2 binary fish school search 2 binary optimization 2 binary particle swarm optimization 2 feature selection 2 handwritten digit recognition 2 support vector machine 2 wavelet transform 2