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visual3d:documentation:third-party:theia [2026/06/15 14:28] – [Kinetic But No Force Assignment] Added detail in our reasoning for "kinetic but no force assignment" feet. wikisysopvisual3d:documentation:third-party:theia [2026/07/23 13:49] (current) – Corrected version number for Theia3D Apex. richard
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 Each ROTATION signal consists of 17 float values per frame: sixteen values represent the 4×4 transformation matrix, and the seventeenth is a reliability metric. These signals are stored sequentially in the C3D file. This data type is used in practice because if a segment’s origin is defined at the proximal end, the ROTATION matrix provides a description of both the position and orientation of that segment. This eliminates the need for additional calculations to estimate pose and makes data management easier, since the pose is a single signal. Each ROTATION signal consists of 17 float values per frame: sixteen values represent the 4×4 transformation matrix, and the seventeenth is a reliability metric. These signals are stored sequentially in the C3D file. This data type is used in practice because if a segment’s origin is defined at the proximal end, the ROTATION matrix provides a description of both the position and orientation of that segment. This eliminates the need for additional calculations to estimate pose and makes data management easier, since the pose is a single signal.
  
-This integration supports all Theia3D software versions including [[https://docs.theiamarkerless.com/|Theia Axiom v2025]], [[https://docs.theiamarkerless.com/version-2024.1.0|Theia Apollo v2024]], [[https://www.theiamarkerless.com/blog/theia-2023-patch-3| Theia 2023]], Theia 2022, and Theia 2021.+This integration supports all Theia3D software versions including [[https://www.theiamarkerless.com/blog/theia3d-apex---the-next-generation-of-markerless-motion-capture-has-arrived|Theia Apex v2026]], [[https://docs.theiamarkerless.com/|Theia Axiom v2025]], [[https://docs.theiamarkerless.com/version-2024.1.0|Theia Apollo v2024]], [[https://www.theiamarkerless.com/blog/theia-2023-patch-3| Theia 2023]], Theia 2022, and Theia 2021.
  
 ===== Automatic Model-building ===== ===== Automatic Model-building =====
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 ^ Theia3D Version ^ Notes/Description ^ Visual3D Version ^ ^ Theia3D Version ^ Notes/Description ^ Visual3D Version ^
 +| Apex (v2026.1.4) | Full release of Bat and Ball tracking | v2026.07.1 |
 +| | Automatic model-builder supports sex-specific regression equations from de Leva (adjusted Zatsiorsky-Seluyanov) for segment inertial properties | |
 | v2025.2.2 | Added Ball Modelling to automatic model | v2026.04.1 | | v2025.2.2 | Added Ball Modelling to automatic model | v2026.04.1 |
-| v2025.2.2 | Implemented Bat and Ball modelling using multiple subjects, allowing multiple balls and bats to be modelling within a single session | v2026.04.1 |+|  | Implemented Bat and Ball modelling using multiple subjects, allowing multiple balls and bats to be modelling within a single session |  |
 | v2025.2.0 | Introduced Bat Tracking feature | v2026.01.1 | | v2025.2.0 | Introduced Bat Tracking feature | v2026.01.1 |
-| Axiom (v2025.1.0) | Separate inertial parameters for male and female participants. | v2025.03.2 | +| Axiom (v2025.1.0) | Separate inertial parameters for male and female participants | v2025.03.2 | 
-| Apollo (v2024.1.0) | Introduction of new model. | v2024.08.4 |+| Apollo (v2024.1.0) | Introduction of new model | v2024.08.4 |
 |  | Model 10 | v2024.02.1 | |  | Model 10 | v2024.02.1 |
 |  | Initial Model | v2020.03.16 | |  | Initial Model | v2020.03.16 |
visual3d/documentation/third-party/theia.1781533698.txt.gz · Last modified: by wikisysop