Hilti Aktiengesellschaft

Trimble Inc.

Vinod Khare

Sascha Korl

Scott Graybill

Ashish Dhital

Matthew Fonken

Yujia Zhang

Two-dimensional targets, such as AprilTags, are used as control points. AprilTags can be used as cost effective alternatives to traditional prism targets without losing accuracy. AprilTags can be placed precisely around a construction site as 'permanent' survey control points, like positioning reflector targets. A robotic total station, equipped with a camera sensor, can image the two-dimensional targets to efficiently resection itself.

Total station re-sectioning using two-dimensional targets

A system and method for recalibrating a projector system. The system includes one or more cameras, a projector, and at least one processor. The at least one processor is configured to execute stored instructions to project one or more patterns on to a work surface via the projector, capture images of the projected one or more patterns via the one or more cameras, perform analysis on the captured images of the one or more patterns, determine projector calibration parameters based at least in part on the performed analysis on the captured images, and recalibrate the projector system such that an image is projected onto the work surface by the projector at a correct position based on the determined projector calibration parameters.

System and method for recalibrating a projector system

Growing community of inventors

Westminster, CO, United States of America

Vinod Khare