Four-point trapezoidal calibration algorithm for human-computer interaction system based on 3D sensor.

• The four-point calibration algorithm is done through the self-developed human-computer interaction touch platform. • The single-touch and multi-touch performance can be accurately achieve through the proposed 3D interactive software system. • The proposed calibration algorithm can achieve precise positioning and real-time interactive control. In the depth image interaction system, there is a deviation between the detection range of the Kinect sensor and the projection interaction surface. Aiming at this problem, this paper proposes a trapezoidal correction algorithm based on the three-dimensional sensor Kinect, and performs the calibration on the interaction space to achieve precise interactive control. The performance of the algorithm is verified by the human-computer interaction control platform, which is developed independently. The algorithm proposed in this paper was applied to the 3D interactive software system, which can achieve accurate single-touch and multi-touch performance. Compared with the traditional optical trapezoidal calibration algorithm, the algorithm tracking accuracy rate and the tracking time have been greatly improved, and a good interactive effect can be well obtained. The presented method can be widely applied to various interactive systems such as image interaction systems, human-computer interaction systems, and multi-touch systems, etc. [ABSTRACT FROM AUTHOR]