Semaphore letter code recognition system using wavelet method and back propagation neural network

The semaphore is one method of communication that can be used for long distances [1].This method is a way to convey information non-verbally with the help of additional signaling tools.This step is taken because there is a relatively long distance between the information giver and receiver.The message is conveyed using this method with the help of two semaphore flags, colored red and yellow, tied to a pole approximately 60cm long and held by the right and left hands, as shown in Figure 1.In Indonesia, semaphore usage as a communication tool is still implemented by the Marines [2] and is part of basic training for scout members.