Atesh Koul
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ateshkoul.bsky.social
Atesh Koul
@ateshkoul.bsky.social
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Post-doc researcher @ Italian Institute of Technology,Rome. Studying how we understand others.
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ateshkoul.bsky.social
OpenPose accuracy varied substantially, ranging from being inaccurate to perfect! Interestingly, this variability reflected the varying amplitude of movements performed - poor estimations for low-amplitude movements while, large-amplitude movements (>10 cm) yielded highly accurate estimates.
Relationship between OpenPose accuracy and movement amplitude. For each of the 12 body parts, plots represent both data density and relationship between OpenPose accuracy (coefficient, y-axis) and amplitude of movement (in cm, x-axis). Insets of each plot show the results of curve fitting (adjusted r-squared) for six different functions (best-fitting functions indicated by red arrows). Non-linear functions (power and exponential) typically showed higher r-squared values than a linear function (dark blue bars). Condition inference tree modelling the relationship between OpenPose accuracy and movement amplitude (all body parts combined). The tree predicts OpenPose accuracy using a set of conditional statements (if–then rules). The results from this analysis show that when movement amplitude is lower than e.g., 0.29 cm (node 3), OpenPose accuracy is very weak (mean coefficient = 0.12). Conversely, when movement amplitude is more than e.g., 10.15 cm (node 15), then OpenPose accuracy is strong (mean coefficient = 0.75). Impact of camera–body distance and movement amplitude on OpenPose accuracy. Violin plots indexing OpenPose accuracy as a function of camera–body distance and movement amplitude. OpenPose accuracy grew with movement amplitude. Additionally, with increasing distance, accuracy dropped only for large- and medium-amplitude movements.
February 17, 2025 at 2:23 PM
ateshkoul.bsky.social
Video-based motion-tracking technologies are increasingly being used. But can we rely on such estimations? What factors might determine the accuracy? Using a large dataset of 550+ minutes from 46 subjects, we estimated the accuracy of OpenPose using a traditional infrared system as ground truth.
Estimation of body landmarks and accuracy of OpenPose.
February 17, 2025 at 2:23 PM