GelSlim 5.0:単一指尖カメラで視覚と触覚を統合
GelSlim 5.0: Unifying Vision and Touch with a Single Fingertip Camera
1台の固定カメラとUV応答性接触層を組み合わせ、照明切替で同一視点から視覚画像と触覚画像を順次取得する指尖センサーを提案。両モダリティを融合するTransformer「VisTacFusion」で物体姿勢と接触形状を推定する。
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著者: Xiangdong Wang, I-Hsuan Huang, Xiaohao Xu, Xili Yi, Nima Fazeli, Xiaonan Huang
分類: cs.RO
原文アブストラクト
Vision and touch provide complementary cues for object pose and local contact geometry, but external cameras are often occluded at the contact site. We present GelSlim 5.0, a fingertip sensor that acquires visual and tactile observations with one fixed camera and a continuous UV-responsive contact layer. By switching illumination, the camera sequentially acquires through-membrane visual images and contact-sensitive tactile images from a shared viewpoint, avoiding inter-camera extrinsic calibration. To combine these observations, we introduce VisTacFusion, a multimodal transformer with separate prediction paths for planar object pose and contact geometry. Asymmetric bottleneck fusion incorporates visual context while preserving tactile spatial features for depth and surface-normal estimation. Modality dropout enables inference with paired inputs or either modality alone. On real validation data from 12 known objects, paired inputs reduce depth MSE, angular error, and translation $L_1$ by 61.2%, 72.3%, and 61.3%, respectively, relative to tactile-only inference with the same model. Relative to visual-only inference, the corresponding reductions are 93.7%, 6.1%, and 8.6%.