Differences

This shows you the differences between two versions of the page.

--- visual3d:documentation:pipeline:signal_commands:vector_coding [2026/05/28 13:43] – wikisysop
+++ visual3d:documentation:pipeline:signal_commands:vector_coding [2026/05/28 19:08] (current) – wikisysop
@@ Line 1: / Line 1: @@
 ====== Vector Coding ======
-The **Vector Coding** command can be used to determine inter-segment coordination with the output being an angle from 0-360 degrees known as the coupling angle. All of the math behind **Vector Coding** is done internally with Visual3D, but a brief summary is provided here for user knowledge. This command is based on work from Needham 2015 with more detailed explanations available in the
+The **Vector Coding** command can be used to determine inter-segment coordination with the output being an angle from 0-360 degrees known as the coupling angle. All of the math behind **Vector Coding** is done internally with Visual3D, but a brief summary is provided here for user knowledge. This command is based on work by Robert Needham with more detailed explanations available in the [[https://www.wiki.has-motion.com/doku.php?id=visual3d:documentation:pipeline:signal_commands:vector_coding#references|References]]
 ===== Vector Coding Process =====
 The Following section will outline the equations and steps followed while conducting the vector coding.
 === Coupling Angle Calculation ===
-The command is based on changes in consecutive segment angles for proximal and distal segments of a given joint. **Equation 1** and **Equation 2** are used to calculate the coupling angle, with the equation used determined by the difference in consecutive angles for the proximal segment. If this result is greater than zero **Equation 1** is used and if the result is less than zero **Equation 2** is used.
+The command is based on changes in consecutive angles for proximal and distal segments of a given joint. **Equation 1** and **Equation 2** are used to calculate the coupling angle, with the equation used determined by the difference in consecutive angles for the proximal segment. If this difference is greater than zero **Equation 1** and if it is less than zero **Equation 2** is used.
-{{:visual3d:documentation:pipeline:signal_commands:equation1.png?500|}}
+{{:visual3d:documentation:pipeline:signal_commands:equation1.1.png?500|}}
-{{:visual3d:documentation:pipeline:signal_commands:equation2.png?500|}}
+{{:visual3d:documentation:pipeline:signal_commands:equation2.1.png?500|}}
 === Angle Conditions ===
@@ Line 18: / Line 18: @@
 === Angle Correction ===
-The results from above must be corrected to a value between 0 and 360 degrees. **Equation 4** is used to make this correction.
+The results above must be corrected to a value between 0 and 360 degrees. **Equation 4** is used to make this correction.
 {{:visual3d:documentation:pipeline:signal_commands:equation4.1.png?225|}}
@@ Line 135: / Line 135: @@
 =====References=====
+The **Vector Coding** process is based on articles by Robert Needham.
+Needham, R., Naemi, R., & Chockalingam, N. (2014). Quantifying lumbar–pelvis coordination during gait using a modified vector coding technique. Journal of Biomechanics, 47(5), 1020–1026. https://doi.org/10.1016/j.jbiomech.2013.12.032 [1]