Patent ID: 10816632

Abstract:
To accomplish 360-degree 6-DoF LED-based visual tracking, a tracked object has to be covered with sufficient number of LEDs so that when observed at any angle from an optical sensor, there are enough features to estimate the 6-DoF pose. Depending on the algorithm, typically, at least 4 feature points need to be seen in order to calculate the 6 DoF pose accurately. However, that would require many LEDs to be placed on the device for 360-degree visual coverage. As the number of LEDs increase, the device size increases because the LEDs need to be spaced out so that they will not fuse together into connected/overlapped blobs when seen from the optical sensor. Uniquely designed Lambertian Diffusers significantly reduce the number of LEDs required for 360 degree-6 DoF tracking and hence enable tracking with small form factor devices.