Consistency of Outputs of the Selected Motion Acquisition Methods for Human Activity Recognition

<div>Optical flow algorithm [<a href="/journals/jhe/2019/9873430/#B25">25</a>]. (a) (<i>n</i> − 1)-th frame representing the silhouette during free gait. (b) Joint part (yellow) of the areas: OF<sub><i>n</i>−1/<i>n</i>−2</sub> (blue) and OF<sub><i>n</i>/<i>n</i>−1</sub> (turquoise). (c) (<i>n</i> − 1)-th frame representing the free gait with detected silhouette contour. (d) Optical flow calculated on bold contour of the moving silhouette and (e) optical flow of the zoomed silhouette part from red frame in (d).</div>

Journal of Healthcare Engineering

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Figure 4

Figure 4: Consistency of Outputs of the Selected Motion Acquisition Methods for Human Activity Recognition 