First Approach to Automatic Measurement of Frontal Plane Projection Angle During Single Leg Landing Based on Depth Video

  • Carlos Bailon
  • Miguel Damas
  • Hector Pomares
  • Oresti Banos
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10069)


Knee alignment measurements are one of the most extended indicators of knee-complex injuries such as anterior cruciate ligament injury and patellofemoral pain syndrome. The Frontal Plane Projection Angle (FPPA) is widely used as a 2-D estimation of knee alignment. However, traditional procedures to measure this angle suffer from practical limitations, which leads to huge time investments when evaluating multiple subjects. This work presents a novel video analysis system aimed at supporting experts in the dynamic measurement of the FPPA in a cost-effective and easy way. The system employs Kinect V2 depth sensor to track reflective markers attached to the patient leg joints to provide an automatic estimation of the angle formed by the hip, knee and ankle joints. Information registered by the sensor is processed and managed by a computer application that simplifies expert’s work and expedites the analysis of the test results.


Knee alignment Frontal Plane Projection Angle Reflective markers Anterior cruciate ligament Patellofemoral pain syndrome Depth video Kinect 2-D analysis 



This work was supported by the University of Granada Research Starting Grant 2015. This work was also partially supported by the Spanish Ministry of Economy and Competitiveness (MINECO) Projects TIN2015-71873-R and TIN2015-67020-P together with the European Fund for Regional Development (FEDER).


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Copyright information

© Springer International Publishing AG 2016

Authors and Affiliations

  • Carlos Bailon
    • 1
  • Miguel Damas
    • 1
  • Hector Pomares
    • 1
  • Oresti Banos
    • 2
  1. 1.Department of Computer Architecture and Computer Technology, CITIC-UGR Research CenterUniversity of GranadaGranadaSpain
  2. 2.Telemedicine GroupUniversity of TwenteEnschedeNetherlands

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