苹果、英伟达等科技公司面临潜在国会调查，曾在特朗普白宫宴会捐款 2500 万美元

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苹果、英伟达等科技公司面临潜在国会调查，曾在特朗普白宫宴会捐款 2500 万美元

无人机光流测试发现分辨率会改变模型间的差距

远处无人机在画面上只有几个像素，轮廓不清时，微小的移动仍能提供定位线索。FlyingDrones团队用物理渲染生成带逐像素位移真值和分割掩码的图像，并按画面尺寸归一化误差。在三个分辨率、999对图像上，研究者比较了16类模型。它们都胜过假设目标完全静止的基准，但在1920×1080分辨率下，不同架构之间的差距更清楚。 Laurenz Ruzicka等人的这项研究收录在11月6日更新的计算机科学预印本列表中。

团队还用21台相机拍摄的真实无人机视频复核结果。在41个模型检查点上，合成测试与真实视频评价的排名相关系数为0.63，具体名次并未完全一致。另一项实验只用800对合成图像微调，在留出的样本中，无人机区域误差最多降低37%。同一架构的不同训练版本表现也可能相差很大，比较时需同时说明所用训练数据。

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