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Improve a 3D distance measurement accuracy in stereo vision systems using optimization methods’ approach

Rodríguez-Quiñonez J. C., Sergiyenko O., Flores-Fuentes W., Rivas-lopez M., Hernandez-Balbuena D., Rascón R., Mercorelli P.

Opto-Electronics Review

2017

Vol. 25, No. 1

24--32

This paper presents a 3D distance measurement accuracy improvement for stereo vision systems using optimization methods A Stereo Vision system is developed and tested to identify common uncertainty sources. As the optimization methods are used to train a neural network, the resulting equation can be implemented in real time stereo vision systems. Computational experiments and a comparative analysis are conducted to identify a training function with a minimal error performance for such method. The offered method provides a general purpose modelling technique, attending diverse problems that affect stereo vision systems. Finally, the proposed method is applied in the developed stereo vision system and a statistical analysis is performed to validate the obtained improvements.

Improve 3D laser scanner measurements accuracy using a FFBP neural network with Widrow-Hoff weight/bias learning function

Rodríguez-Quiňonez J. C., Sergiyenko O., Hernandez-Balbuena D., Rivas-Lopez M., Flores-Fuentes W., Basaca-Preciado L. C.

Opto-Electronics Review

2014

Vol. 22, No. 4

224-235

Many laser scanners depend on their mechanical construction to guarantee their measurements accuracy, however, the current computational technologies allow us to improve these measurements by mathematical methods implemented in neural networks. In this article we are going to introduce the current laser scanner technologies, give a description of our 3D laser scanner and adjust their measurement error by a previously trained feed forward back propagation (FFBP) neural network with a Widrow-Hoff weight/bias learning function. A comparative analysis with other learning functions such as the Kohonen algorithm and gradient descendent with momentum algorithm is presented. Finally, computational simulations are conducted to verify the performance and method uncertainty in the proposed system.