arXiv:2607.23136eess.IVcs.PF2026-07中稿 · presentation at ED…

优化算法在树莓派上实现高光谱图像融合,速度提升32.3%。

Optimized Embedded Implementation of Hyperspectral-Multispectral Image Fusion on Raspberry Pi

  • 将核心计算迁移至PyTorch与ONNX Runtime等边缘推理框架
  • 树莓派5上执行时间从527.1毫秒降至356.7毫秒
  • 保持融合质量的同时显著提速,适合无人机遥感场景

遥感光学图像在众多应用中日益重要。高光谱图像凭借其高光谱分辨率,可提取观测场景中物体与材料的丰富信息。然而,由于数据量庞大,处理此类数据需消耗大量计算资源,难以实现实时处理。此前我们提出在树莓派上实现高光谱超分辨技术HSB-SV的可行性,但存在计算耗时过长的问题。为解决该问题,本文采用计算优化技术,将最密集的运算操作迁移到PyTorch及边缘推理框架(如ONNX Runtime和ExecuTorch,使用XNNPACK后端)。优化后的实现部署于树莓派5平台。实验结果表明,整体计算时间减少32.3%,从527.1毫秒降至356.7毫秒,实现1.48倍的速度提升,同时完全保留融合质量,使该方法更适用于嵌入式与边缘计算场景,尤其适合基于无人机的高光谱遥感应用。

原文摘要 · Abstract (English)

Remote sensing optical images have become central to a wide range of applications. In particular, hyperspectral images, with their high spectral resolution, enable the extraction of rich information about the objects and materials present in the observed scene. Nevertheless, processing such data comes at the expense of a high computational load due to its large data volume, making real-time processing very difficult to achieve. Recently, we proposed an approach to investigate the feasibility of processing such data on a Raspberry Pi by implementing a hyperspectral super-resolution technique, namely HSB-SV. However, the implementation resulted in high computational time. To overcome this limitation, we apply computational optimization techniques based on migrating the most intensive operations to PyTorch and edge inference frameworks such as ONNX Runtime and ExecuTorch with the XNNPACK backend. The proposed optimized implementation is deployed on a Raspberry Pi 5 platform. Experimental results demonstrate a significant reduction in computational time, achieving a 1.48x overall speedup on the Raspberry Pi 5, the total execution time decreases significantly, from 527.1 ms to 356.7 ms corresponding to a 32.3% dminution, while fully preserving the fusion quality, making the approach more suitable for embedded and edge computing scenarios, particularly for UAV-based hyperspectral remote sensing applications.

嵌入式计算图像融合边缘推理无人机遥感

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