Method to generate training samples for neural network used in target recognition

Training neural network to recognize targets needs a lot of samples. People usually get these samples in a non-systematic way, which can miss or overemphasize some target information. To improve this situation, a new method based on virtual model and invariant moments was proposed to generate training samples. The method was composed of the following steps: use computer and simulation software to build target object's virtual model and then simulate the environment, light condition, camera parameter, etc.; rotate the model by spin and nutation of inclination to get the image sequence by virtual camera; preprocess each image and transfer them into binary image; calculate the invariant moments for each image and get a vectors' sequence. The vectors' sequence which was proved to be complete became the training samples together with the target outputs. The simulated results showed that the proposed method could be used to recognize the real targets and improve the accuracy of target recognition effectively when the sampling interval was short enough and the circumstance simulation was close enough.