Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A system and method for surface profiling via a projection system, such as a position enabled projector. By way of example, a three-dimensional representation of a physical object, such as an uneven surface of the object, may be generated and profiled. The three-dimensional representation may be a 3D point cloud, a surface mesh, or any other suitable type of representation. A two-dimensional image to be projected onto the surface may undergo an image transformation based on the generated 3D representation of the surface. The transformed image is then projected onto the surface, where the image points projected are at their true positions with true scale. Moreover, the projected image may be automatically updated when the projector is moved to a new position.

Abstract: The invention is directed to a system and method for recalibrating a projector system. The projector may be calibrated using one or more cameras arranged near or adjacent to a projector of a projector system. The one or more cameras may be calibrated once and made mechanically stable so that they do not move relative to each other. During operation of the projector system, the projector may project one or more specific patterns onto a work surface, where the one or more cameras capture each of the projected patterns. All the captured images of the patterns by the one or more cameras may be used to determine projector calibration parameters in order to recalibrate the projector.