地形識別のためのマルチスペクトル画像の差分解析
Differential Analysis of Multispectral Images for Terrain Identification
照明変化や材料の曖昧さに頑健な軽量マルチスペクトル地形識別フレームワークDRIFTを提案し、UAV搭載カメラで取得した油汚染土壌データセット等で評価した。
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著者: Omar Kashmar, Hemendra Arya, Fulvio Mastrogiovanni
分類: cs.RO, eess.IV
原文アブストラクト
Reliable terrain understanding is a prerequisite for autonomous robot navigation. Yet, the widespread RGB-based perception can fail under low illumination, shadows, and material ambiguities. In this work we propose DRIFT, a lightweight multispectral framework that combines raw spectral bands and illumination-tolerant band-ratio representations through a dual-stream residual architecture and a differential fusion branch. Band ratios attenuate multiplicative acquisition effects (illumination/sensor gains), while the differential fusion explicitly highlights discrepancies between absolute-band and ratio-derived cues, which improves the robustness to noisy or partially unreliable spectral measurements. In the paper (i) we evaluate DRIFT on a new oil-on-soil multispectral dataset acquired using a MicaSense RedEdge-P camera mounted on an Unmanned Aerial Vehicle, and (ii) we provide an additional controlled study on water-on-grass under varying illumination and thermal perturbations (hot/cold water) to analyze NIR-sensitive effects. DRIFT consistently improves over strong baselines, while remaining compatible with edge deployment.
