Motion Capture

Motion capture is the key part of moving object setting tracker. Motion capture (Mocap) Motion capture (Motion capture) Technology involves data that can be directly understood and processed by a computer in terms of dimensional measurements, object orientation and orientation in physical space.

The tracking device is set at the key part of the moving object. The tracking device is captured by the Motion capture system, and the data of three-dimensional space coordinates are obtained after computer processing. When the data is identified by computer, it can be used in animation production, gait analysis, biomechanics, man-machine engineering and other fields.

The commonly used motion capture technology can be divided into mechanical type, acoustic type, electromagnetic type, active optical type and passive optical type. The equipment with different principles has their advantages and disadvantages, which can be generally evaluated from the following aspects: positioning accuracy; Real-time; Ease of use; The range of motion can be captured; Anti-interference; Multi-target capture capability; And the degree of connection with the relevant professional analysis software. In addition, there is inertial navigation motion capture.

Using motion capture technology in animation production can greatly improve the level of animation production. It greatly improves the efficiency of animation production, reduces the cost, and makes the animation production process more intuitive and more vivid. With the further maturity of technology, performance animation technology will be more and more widely used, and motion capture technology, as an indispensable and crucial part of performance animation system, will inevitably show a more important position.

Motion capture technology is not only a key link in performance animation, but also has a wide range of applications in other fields.

To provide new means of human-computer interaction Expressions and actions form is an important expression of human emotion, desire, completed the motion capture technology will expressions and actions of digital work, provides a new means of human-computer interaction, than the traditional keyboard, mouse more direct convenient, not only can realize "3 d mouse" and "gesture recognition", also can make the operator to the natural movements and expressions direct control of the computer, and to eventually be able to understand the human expression, action of the computer system and provides technical basis for robot.

Virtual reality system In order to realize the interaction between human and virtual environment and system, the position and direction of the participant's head, hands, body, etc. Must be determined, and the action of the participant can be accurately tracked and measured, and these actions can be detected in real time, so as to feedback the data to the display and control system. These work is indispensable to virtual reality system, which is also the research content of motion capture technology.

Robot remote control The robot will transmit the information of the dangerous environment to the controller, who will make various movements according to the information. The motion capture system will capture the movements and transmit them to the robot in real time and control it to complete the same movements. Compared with the traditional remote control method, this system can realize more intuitive, detailed, complex, flexible and rapid motion control, and greatly improve the robot's ability to cope with complex situations. At present, this technology is of special significance in the case of immature robot autonomous control.

Interactive game The motion capture technology can be used to capture various movements of players, to drive the movements of characters in the game environment, to give players a new feeling of participation, and to strengthen the sense of reality and interaction of the game.

Sports training Sports capture technology can capture the movements of athletes, facilitate quantitative analysis, and combine with the principles of human physiology and physics to study improved methods, so that sports training can get rid of the state of purely relying on experience and enter the era of theorization and digitalization. It can also capture the poor athletes' movements and compare them with those of elite athletes to help them train.

In addition, in the fields of ergonomic research, simulation training, biomechanics research, motion capture technology is also promising.

It can be predicted that with the development of the technology itself and the improvement of the technology level in relevant application fields, motion capture technology will be more and more widely used.