AnalogDepth: アナログ映像伝送下のFPVドローンによる多視点幾何
AnalogDepth: Multi-view Geometry from FPV drones under Analog Video Transmission
FPVドローンのアナログ映像ノイズに適応させるため、LoRAと知識蒸留でDepth Anything 3を微調整し、実ノイズバンクを用いることで深度推定と3D再構成の精度を向上させた研究。
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著者: André Amorim, Pedro F. Proença
分類: cs.CV, cs.RO
原文アブストラクト
Analog video transmission (VTX) remains widespread in FPV drones due to low latency, weight and low cost. However analog VTX suffers from complex spatially structured image degradation which differ fundamentally from digital image corruption (e.g. AWGN) used in standard training augmentation. This work shows that this type of noise severely degrades the accuracy of Depth Anything 3 (DA3), a state-of-the-art feed forward visual geometry foundation model. To address this gap, we present AnalogDepth, a parameter-efficient training pipeline that adapts DA3 to analog FPV imagery using student-teacher knowledge distillation with Low-Rank Adaptation (LoRA) injected into the DINOv2 backbone. Rather than synthesizing noise analytically, we build a noise bank from static FPV recordings under diverse conditions and compare real-noise injection against PSD-matched Gaussian synthesis and AWGN as baselines. Experiments on six real FPV flight sequences across three indoor scenes show that training with our noise bank consistently reduces per-frame depth RMSE and 3D reconstruction Chamfer distance compared to the pretrained DA3 baseline and both Gaussian noise variants. These results demonstrate that replicating the spatial structure of real analog transmission noise is critical for effective adaptation.
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