Active type optical motion capture system

Abstract

The invention discloses an active type optical motion capture system which comprises a camera, a switch, a host and an active light emitting device which are connected in sequence. The switch is used for transmitting a shutter and exposure signals of the camera to the host; the host is used for supplying power to an active light emitting device and controlling the active light generation device to be turned on or turned off; the active light emitting device is adopted as a mark point, and identity information is transmitted to the camera through lamplight changes. According to the active type optical motion capture system, the active light emitting device is adopted for replacing a passive witch ball as the mark point, when an infrared light emitting diode of the active light emitting device is turned on, infrared light is emitted out, and the camera can sense the mark point when the camera is far away from the camera; by means of communication means and the switch, the shutter and exposure information of the camera is transmitted to the host, the host controls the active light emitting device to achieve synchronization of the shutter of the camera and the time sequence of the infrared light emitting diode, and the recognition precision and stability of the motion capture system are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and in particular relates to an active optical motion capture system. Background technique [0002] Motion capture is a high-tech technology that accurately measures and records the trajectory or posture of an object in a real three-dimensional space in real time, and reconstructs the motion state of the moving object at each moment in a virtual three-dimensional space. [0003] Optical motion capture is based on the principle of computer vision, and multiple high-speed cameras monitor and track target feature points from different angles for motion capture. Theoretically, for any point in space, as long as it can be seen by two cameras at the same time, the position of the point in space at this moment can be determined. When the camera shoots continuously at a high enough rate, the motion trajectory of the point can be obtained from the image sequence. The acquisition sensors o...

AI Technical Summary

Problems solved by technology

Its main advantages are mature technology, high precision, high sampling rate, accurate motion capture, flexible and fast performance and use, Marker points can be added and arranged at will at low cost, and have a wide range of applications; the disadvantage is that it is uncomfortable due to sunlight interference in the field of view For outdoor applications, Marker points are easily confused and require manual intervention in post-processing for data cleaning, which requires a large workload

Moreover, as the distance between the camera and the reflective ball increases, the reflected signal weakens, which is not conducive to the positioning of the marker point, and is also not conducive to the recognition of the marker point

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