See SPLYZA Motion's Accuracy in Action

A Video Comparison with an Optical Motion Capture System

See It in the Video

These videos overlay data measured by SPLYZA Motion with data from an optical motion capture system in a 3D view. See the comparison for yourself.

*Video Notes
 - Red: SPLYZA Motion v1.38.4 (from a cell video)
 - Green: MAC3D System (with 16 cameras and markers)

▼Running

▼Batting

▼Pitching

Tips for Maximizing 3D Recognition Accuracy

Due to the nature of AI recognition, it's true that accuracy can vary depending on the type of motion and the filming environment. Here are some tips to maximize the accuracy of SPLYZA Motion's 3D recognition.

(1) Motions Well-Suited for 3D Recognition

Motions that involve various angles relative to the camera, such as "throwing" or "dancing," are recognized well. Additionally, in accuracy tests conducted with a third-party organization, motions with few body occlusions like "walking" and "mid-sprint running" tend to allow the AI to recognize joint points easily, resulting in stable data with less error compared to optical systems.

(2) Motions Less-Suited for 3D Recognition

For motions where specific parts of the body are barely visible, the accuracy for those parts may decrease, or they may not be recognized at all. This can be improved by facing the camera at the beginning or end of the motion (e.g., the left side of the body when filming walking from the right side). In our accuracy tests, motions where parts of the body are obscured by equipment, such as "pedaling a bicycle," tend to show larger errors.

(3) Filming Tips

  • Recommended Filming Method (using iPhone/iPad Camera App):
    • Film horizontally.
    • Keep the camera stationary during filming (use a tripod, etc.).
    • For sports, use slow-motion capture (120fps–240fps) whenever possible.
    • Ensure the entire body is visible and takes up at least one-third of the screen's height.
  • To correctly set the Z-axis (perpendicular to the ground) in the motion capture, please film with the camera set up vertically to the ground. It is also possible to adjust the XYZ axes within the app.
  • Blurry video can hinder recognition. If this occurs, increasing the amount of light by turning off slow-motion or filming outdoors during the day may improve the results.

SPLYZA Motion's greatest advantage is the ability to perform motion analysis easily in your daily practice environment, like on the field or in the gym, without special equipment or markers. We hope you'll use these tips to get the most out of it in various scenes.

Learn More / Try It Out

Many of our app users are already utilizing SPLYZA Motion in their research and clinical practice. We are also continuously improving accuracy and functionality through joint research with multiple universities.


For detailed data from the accuracy verification tests conducted with a third-party organization, please contact us individually.

For those who want to learn more about SPLYZA Motion's features and use cases, or who wish to see it for themselves, please proceed from the links below.


▼Reference Article


*All information on this page is current as of August 2025.

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