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arXiv 2604.03301cs.CVcs.AI
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仅嵌入式上行用于远程传感中的 onboard 检索位移

Embedding-Only Uplink for Onboard Retrieval Under Shift in Remote Sensing

Telepix

Sangcheol Sim

AI总结:

研究在远程传感位移下,仅嵌入式上行是否有效,通过对比不同任务的决策头性能,证明嵌入式上行是关键,且在不增加上行成本下可选择最佳头。

摘要:

下行瓶颈促使 onboard 系统优先处理危险而不传输原始像素。我们研究一种严格设置,地面站仅上传紧凑嵌入和元数据,onboard 系统通过向量搜索筛选新捕获。我们问这种仅嵌入式流程在显式远程传感位移下是否有效:跨时间(事件前后)、跨事件/地点(不同灾害)、跨站点云(15个地理站点)和跨城市AOI验证(建筑物)。使用OlmoEarth嵌入在扩展的公共多任务基准(27个Sentinel-2 L2A场景,15个云站点,5个SpaceNet-2 AOI;10个种子)上,发现所有有效方法依赖相同上传嵌入,但最优决策头任务依赖:kNN检索在云分类中显著优于均值(0.92 vs. 均值0.91;p<0.01,Wilcoxon),而均值主导时间变化检测(0.85 vs. 检索0.48;p<0.01)。这些结果表明,仅嵌入式上行是关键,一旦嵌入在 onboard,系统可在不增加上行成本下选择最佳头,每查询所有 telemetry 低于1KB。

英文摘要:

Downlink bottlenecks motivate onboard systems that prioritize hazards without transmitting raw pixels. We study a strict setting where a ground station uplinks only compact embeddings plus metadata, and an onboard system performs vector search to triage new captures. We ask whether this embedding-only pipeline remains useful under explicit remote-sensing shift: cross-time (pre/post-event), cross-event/location (different disasters), cross-site cloud (15 geographic sites), and cross-city AOI holdout (buildings). Using OlmoEarth embeddings on a scaled public multi-task benchmark (27 Sentinel-2 L2A scenes, 15 cloud sites, 5 SpaceNet-2 AOIs; 10 seeds), we find that all effective methods rely on the same uplinked embeddings, but the optimal decision head is task-dependent: kNN retrieval is significantly superior for cloud classification (0.92 vs. centroid 0.91; p<0.01, Wilcoxon), while class centroids dominate temporal change detection (0.85 vs. retrieval 0.48; p<0.01). These results show that embedding-only uplink is the key enabler--once embeddings are onboard, the system can select the best head per task at no additional uplink cost, with all telemetry under 1 KB per query.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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