Seams are areas of overlapping fabric formed by stitching two or more pieces of fabric together in the cut-and-sew apparel manufacturing process. In SeamPose, we repurposed seams as capacitive sensors in a shirt for continuous upper-body pose estimation. Compared to previous all-textile motion-capturing garments that place the electrodes on the surface of clothing, our solution leverages existing seams inside of a shirt by machine-sewing insulated conductive threads over the seams. The unique invisibilities and placements of the seams afford the sensing shirt to look and wear the same as a conventional shirt while providing exciting pose-tracking capabilities. To validate this approach, we implemented a proof-of-concept untethered shirt. With eight capacitive sensing seams, our customized deep-learning pipeline accurately estimates the upper-body 3D joint positions relative to the pelvis. With a 12-participant user study, we demonstrated promising cross-user and cross-session tracking performance. SeamPose represents a step towards unobtrusive integration of smart clothing for everyday pose estimation.
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