Low-cost active stereo vision system delivers 3D depth maps

October 16, 2019 //By Julien Happich
depth maps
ams has announced a new Active Stereo Vision (ASV) technology product portfolio which enables manufacturers of consumer, computing and industrial products to implement face recognition and other 3D sensing applications more easily and at lower cost.

The new hardware and software solution generates accurate 3D depth maps using twin infrared cameras that sense the target illuminated by miniature laser projectors. The system supplied by ams includes: the ams Belago product, a

4.2x3.6x3.3mm vertical-cavity surface-emitting laser (VCSEL) illuminator which projects a semi-random high-density dot-pattern on the target; the ams PMSILPlus (VCSEL) flood projector, which features an improved wafer-level optical diffuser for uniform irradiance over the target plane; dual infrared cameras; the company’s software for generating a depth map image from the reflections captured by the cameras; system calibration software and face-recognition software. Compared to structured light solutions, the new solution is more cost effective without compromising on depth map quality and resolution and supports easier assembly processes. The depth maps generated by the ams ASV technology enabling face recognition to meet payment-grade quality standards, an industry first. They can also be used in other 3D sens-

ing applications such as: AR/VR using simultaneous localization and mapping (SLAM); driver moni-toring in automotive systems; 3D scanning in smart factory production systems; and eLock and Point-of-Sales systems.
The launch version of the ams ASV reference design is based on the Qualcomm Snapdragon platform optimized for mobile phones. Both the Belago and PMSILPlus emitters incorporate an eye-safety interlock to shut down the device in the event of lens crack or lens detachment.

ams - www.ams.com

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