3D Cal: 視覚ベース触覚センサーの深度再構成のためのオープンソースソフトウェアライブラリ
3D Cal: An Open-Source Software Library for Depth Reconstruction on Vision-Based Tactile Sensors
低コスト3Dプリンタを自動プローブ装置に変え、視覚ベース触覚センサーのキャリブレーション用データを大量生成し、深度再構成ネットワークを訓練するオープンソースライブラリを提案。
詳しい要約
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著者: Rohan Kota, Kaival Shah, J. Edward Colgate, Gregory Reardon
分類: cs.RO
原文アブストラクト
Tactile sensing plays a key role in enabling dexterous and reliable robotic manipulation, but realizing this capability requires substantial calibration to convert raw sensor readings into physically meaningful quantities. Despite its near-universal necessity, the calibration process remains ad hoc and labor-intensive. Here, we introduce 3D Cal, an open-source library that transforms a low-cost 3D printer into an automated probing device capable of generating large volumes of labeled training data for calibrating vision-based tactile sensors. 3D Cal also provides an end-to-end, user-friendly pipeline for training custom convolutional networks to produce high-quality depth reconstructions. Using 3D Cal, we systematically explore the relationship between training data volume and spatial reconstruction performance on two commercially available sensors, DIGIT and GelSight Mini, and derive practical, empirically-grounded guidelines for calibrating these sensors. Finally, we demonstrate depth reconstruction performance on the DIGIT and GelSight Mini comparable to state-of-the-art methods, achieving average reconstruction errors of 156 $\mathrm{\mu m}$ and 205 $\mathrm{\mu m}$ on unseen objects, respectively. By automating tactile sensor calibration, 3D Cal can accelerate tactile sensing research, simplify sensor deployment, and facilitate the integration of tactile sensing in robotic platforms.
