-- Revealer High-Speed Cameras and REMA Software Explore “Sports Empowered by Science and Technology” Research Applications
Keywords: high-speed camera; motion analysis; REMA motion analysis software; sports biomechanics; sports training; trajectory tracking; Revealer
A single strike — from swinging the racket, to contacting the ball, to the ball flying off — contains a series of rapid changes.
Coaches care about whether the movement is coordinated; athletes sense whether the strike feels smooth. Researchers want to confirm further: in which phase does the racket head accelerate? At what moment does ball contact occur? What are the differences in motion trajectories before and after a technical adjustment?
Answering these questions requires grounding the judgment of movement in a concrete process.
A high-speed camera can record key moments, while motion analysis measurement software extracts position, displacement, and velocity information from the continuous images. The combination of Revealer high-speed cameras and REMA motion analysis measurement software provides an observation method for sports training review and biomechanics research: correlating motion footage with verifiable parameters, helping coaches and researchers discuss where the differences occur.
Targeted at research topics related to the key special project “Sports Empowered by Science and Technology” under the National Key R&D Program, the application value of such technologies is also embodied in the refinement and validation of concrete training questions.
Key Changes Occur Between Adjacent Frames
The rate of change in sports movements is not uniform. A complete swing includes preparation, acceleration, and follow-through phases, yet the contact between racket and ball is extremely brief; a jump has a longer preparation process, while support transition and take-off are concentrated in a shorter time window.
If image sampling is insufficient, some key changes may occur between two adjacent frames, increasing the difficulty of event detection and subsequent measurement.
Revealer high-speed cameras record rapid processes with denser temporal sampling. Slow-motion playback and frame-by-frame observation help researchers locate events such as ball contact, release, take-off, and string contact, and examine changes in the movements before and after.
For sports training, a useful set of high-speed images should retain the objects of interest and key phases, providing the basis for subsequent analysis.
From “Seeing the Movement” to “Measuring the Movement”
Image recording answers how a movement occurs; motion analysis measurement further describes the quantifiable changes within it. REMA (Revealer Motion Analysis) motion analysis measurement software provides functions such as annotation, target definition, motion tracking, parameter calculation, and result review. Researchers can choose the barbell plate center, racket features, or the endpoint of a throwing device, track its position in continuous images, and generate trajectories and related parameter curves.
Take weightlifting research as an example: during the pull, the barbell moves vertically and may also exhibit horizontal deviation. By matching the trajectory with the original images, researchers can check at which phase the change begins, and then discuss the cause in the context of the movement at that moment.
Racket head velocity analysis plays a similar role. Researchers can compare motion changes around the ball-contact event and observe whether reproducible differences appear after technical adjustments.
Such parameters need to be interpreted under explicit conditions. Velocity derives from the change of position over time; positioning errors and data processing methods will affect the results; 2D trajectories and 3D spatial trajectories also require different calibration and camera configurations.
What Revealer high-speed cameras and REMA software provide are image acquisition and analysis tools; how the measurement objects, coordinate systems, and motion events are defined remains part of the research design.
Table Tennis Experiment
In table tennis research, the ball’s position, rotation, and striking action are different observation tasks.
To track the flight trajectory, the ball needs to remain visible in consecutive frames; to study the contact process, the coverage needs to span the phases before and after the racket-ball contact; to analyze spin, identifiable features on the ball surface need to be clearly resolved.
Table tennis robot experiments provide a reference for this task division. Robot research needs to connect visual observation with subsequent analysis or control; motion review in sports training, however, can first focus on the racket head trajectory, swing velocity, or the changes around ball contact.
Figure: Table tennis experiment scene recorded by a Revealer high-speed camera and three-dimensional positions. The Ji Yunfeng team at the University of Shanghai for Science and Technology reconstructed the motion trajectory of a table tennis robot through high-speed imaging, providing visual data support for experimental research and Guinness World Records certification.
Multiple Sports Can Be Measured
Weightlifting focuses on barbell motion; throwing focuses on equipment release; archery focuses on release and bow-string dynamics; jumping focuses on support transition and take-off. Different sports have different measurement tasks.
The joint role of high-speed imaging and motion analysis measurement is to make key processes reviewable and to give the motion changes of selected objects a comparable expression.
In research on the spatial motion of equipment, binocular measurement with appropriate features, synchronization, and calibration conditions can supplement the information from a single viewpoint. When multiple independently moving targets are involved, target association, occlusion, and trajectory continuity need to be examined.
The application of REMA motion analysis measurement software should be developed according to the specific object and module capabilities. Clarifying these conditions makes the results more interpretive.
How Measurement Parameters Enter Sports Training Discussions
Multiple movements by the same athlete can be aligned by common events such as ball contact, release, or take-off, and then compared in terms of trajectory, velocity, and phase timing.
Such comparisons help examine recurring differences. Around a specific training adjustment, researchers can also observe whether the relevant parameters change, and whether the changes remain consistent across repeated trials.
Motion analysis measurement does not replace coaching judgment. What it adds is information that can be checked against the original footage, making the discussion more specific: in which phase did the change occur, which object was involved, and whether it correlates with actual performance.
In biomechanics research, kinematic data can also be used jointly with information from force plates, EMG, and other sources. Trajectories and velocities describe motion, while joint moments, contact forces, and muscle forces require corresponding measurements or model support. Before joint analysis, time synchronization and coordinate relationships should also be verified.
Making the Technology Serve Verifiable Questions
Configuring high-speed cameras and motion analysis software for sports science requires first clarifying the object and process: observing the ball or the equipment; recording the complete movement or a local key phase; whether image playback, 2D trajectories, or spatial position and posture information is needed.
These requirements influence camera position, lenses, exposure, the number of cameras, and the choice of software modules. Test shooting and result review help researchers confirm whether the target is clear, whether the features are stable, and whether the output parameters meet the task requirements.
The application value of Revealer high-speed cameras and REMA motion analysis measurement software lies in converting rapid movements into information that can be located, compared, and reviewed. From a single strike, a barbell pull, to a release process, concrete questions in sports training thus gain a basis for further study.
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