Keyphrases
- np hard
- learning algorithm
- theoretical analysis
- detection algorithm
- optimization algorithm
- computationally efficient
- similarity measure
- particle swarm optimization
- experimental evaluation
- simulated annealing
- worst case
- times faster
- high accuracy
- matching algorithm
- cost function
- computational complexity
- improved algorithm
- space complexity
- linear programming
- experimental study
- recognition algorithm
- segmentation algorithm
- expectation maximization
- maximum likelihood
- data sets
- probabilistic model
- computational cost
- preprocessing
- face recognition
- genetic algorithm