Position detection with high precision using novel compound-eye sensor

Hao Zhang; Keyi Wang; Zhaolou Cao; Qinglin Wu

doi:10.1117/12.839170

23 November 2009 Position detection with high precision using novel compound-eye sensor

Hao Zhang, Keyi Wang, Zhaolou Cao, Qinglin Wu

Proceedings Volume 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications; 75081L (2009) https://doi.org/10.1117/12.839170
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

A new compound eyes model is designed to track the fast-moving object and detect its position with high precision in complex background. The compound eyes that consist of several eyelet channels have good nature of wide fields of view and high update rate for vision systems. Adjacent eyelet fields of view have certain degree of overlapping for detecting 3D coordinates of an object. Gradient lenses, instead of fiber bundles, are used below each eyelet lens in order to transfer eyelet image onto a re-image structure in simulation. And the eyelet image is projected onto a Charge Coupled Device (CCD) detector array through the gradient lens, avoiding expensive fiber bundles and complex assembly. Besides, simulation and analyze of the compound eyes model is performed. Neural network calibration algorithm has been adapted to build the relationship between the object points and corresponding image points for each eyelet. This calibration algorithm provides a highly accurate prediction of object data points from their corresponding image points. After getting the intrinsic and extrinsic parameters of each eyelet channel, 3D coordinates of an object can be calculated from its image points. Preliminary experimental results for Neural Network calibration are presented and evaluated, showing residual errors between actual and predicted direction angles of around 10^-3~10^-4 rad. And errors between actual and calculated coordinates of position are within 3%.

Citation Download Citation

Hao Zhang, Keyi Wang, Zhaolou Cao, and Qinglin Wu "Position detection with high precision using novel compound-eye sensor", Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 75081L (23 November 2009); https://doi.org/10.1117/12.839170

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