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. 2023 Mar 2;10:1108114. doi: 10.3389/frobt.2023.1108114

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Copyright © 2023 Haberfehlner, van de Ven, van der Burg, Huber, Georgievska, Aleo, Harlaar, Bonouvrié, van der Krogt and Buizer.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Example of extracted pixel coordinates of one stick figure movie during sitting (A) and lying (B) “in rest” : The mean stick figure of the videos is plotted in black, in color one example frame is provides, including also the dots of the body points of the whole video. The features are calculated for the left and right wrist and elbow within the sitting videos (A) and for the left and right ankle and knee within the lying videos (B). (1), (2), (3) are the features that are extracted from each frame. The features are indicated by a red dotted line: (1) The pixel distance to the average of the body part position in the entire video (distance-to-middle-point), (2) The distance to the line drawn from the shoulder to the hip (the bodyline is indicated with a blue dashed line) (3) The angle of a joint.