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Keypoint Transformer: Solving Joint Identification in Challenging Hands and Object Interactions for Accurate 3D Pose Estimation

CVPR 2022 · 3D vision › Human pose estimation · approach: Depth-based hand pose regression · 162 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Replace per-joint heatmaps with detected keypoints and attention-based associationKeypoint Transformer · InterHand2.6MMPJPE (All, mm): 14.22 -> 12.78Helped
Use detected keypoint features rather than features from the whole imageKeypoint Transformer · InterHand2.6MMPJPE (All, mm): 14.48 -> 12.78Helped
Add decoder cross-attention to the CNN+SA baselineCNN+SA · InterHand2.6MMPJPE (All, mm): 15.31 -> 14.48Helped
Add keypoint-joint association loss (ablation)Keypoint Transformer · InterHand2.6M interacting hand imagesMPJPE (mm): 18.91 -> 17.08Helped
Add keypoint-joint association loss (ablation)Keypoint Transformer · InterHand2.6M interacting hand imagesMRRPE (mm): 38.96 -> 33.14Helped
Use 3D joint locations instead of MANO joint angles (ablation)Keypoint Transformer · InterHand2.6M, two handsMPJPE (mm): 20.61 -> 17.08Helped
Use 2.5D joint locations instead of MANO joint angles (ablation)Keypoint Transformer · InterHand2.6M, two handsMPJPE (mm): 20.61 -> 17.69Helped
Use 3D rather than 2.5D joint representation (ablation)Keypoint Transformer · InterHand2.6M, all handsMPJPE (mm): 14.73 -> 14.76No clear effect
Add self-attention layers (ablation)Keypoint Transformer · InterHand2.6M, two handsMPJPE (mm): 16.93 -> 15.44Helped
Increase cross-attention layers from 1 to 6 (ablation)Keypoint Transformer · InterHand2.6M, two handsMPJPE (mm): 15.44 -> 15.33No clear effect
Use ResNet-50 rather than ResNet-18 backbone (ablation)Keypoint Transformer · InterHand2.6M, two handsMPJPE (mm): 16.78 -> 15.32Helped
Apply Keypoint Transformer to HO-3D hand-object pose estimationKeypoint Transformer · HO-3DJoint Error: 3.04 -> 2.57Helped

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