DMD-based multi-target laser tracking for motion capturing

Abstract

The two approaches presented in this paper consist of splitting the tracking action into two sub-systems. The decoupling of local scanning and global scanning functions is an alternative solution to the use of fast-steering, power-consuming galvanometric scanner. Applications targeted are multi-object tracking and 3D perception in safe condition. This paper presents more specifically an approach based on a Risley prism configuration steering a laser pattern dynamically shaped by a DMD * allowing a good compromise for the refresh rate and the precision.

An Automatic Calibration Method for the Field of View Aberration in a Risley-Prism-Based Image Sensor

“…In robotic vision tracking, Souvestre, F. et al [ 21 ] used the Risley-prism-based imaging sensor to dynamically deflect the laser beam to realize overall scanning and to expand the scanning field to realize multi-target laser tracking. Li, A. et al [ 22 ] proposed a visual tracing model based on Risley prisms and two real-time visual tracing strategies, which effectively avoid the problems of target loss and tracking instability.…”

Comparison of refractive rotating dual-prism scanner used in near and far field

“…In the field of robot vision tracking, rotating dual-prism scanner is also applied to achieving overall scanning by dynamically deflecting the laser beam and realizing multi-target laser tracking by expanding scanning filed [11,16,17].…”

“…Using rotating dual-prism scanner to accomplish long-distance target detecting and tracking instead of traditional system such as universal rotating bracket and universal rotating mirror can not only meet the requirements of large-aperture beam deflection to realize stable pointing with high resolution, but also make the system more compact and convenient for the structure design and installation of carrier platform. Deflecting laser beam by rotating dual-prism scanner can realize beam scanning and target pointing and tracking for laser radar, laser guidance, laser weapon, and laser designator [8][9][10][11].…”