Naprstek Tomas, Arroyo-Mora J Pablo, Johnston Joshua M, Leblanc George
Flight Research Laboratory, Aerospace Research Centre, National Research Council Canada, ON, Canada.
Canadian Forest Service, Natural Resources Canada, ON, Canada.
MethodsX. 2021 Jul 27;8:101471. doi: 10.1016/j.mex.2021.101471. eCollection 2021.
Airborne remotely sensed data (. hyperspectral imagery, thermal videography, full frame RGB photography) often requires post-processing to be combined into a series of images or a mosaic for analysis. This is generally accomplished through the use of position and attitude hardware (. Global Navigation Satellite System - GNSS / Inertial Measurement Unit - IMU) in combination with specialized software. Occasionally, hardware failure in the GNSS/IMU instrumentation occurs, however the data are still recoverable through a correction process, which allows image registration to mosaic the data. Here we present a simple and flexible MATLAB® code package that has been developed to combine video-based remotely sensed data. It first applies an iterative image registration process to align all frames, using pre-existing GPS information if supplied by the user, and then grids the frame data together to develop a final, single mosaic dataset that can be used for analysis. An example of this method using airborne infrared video data of a wildfire is shown as a demonstration.•MATLAB functions are easily adaptable to specific user needs and datasets.•The method outputs the combined data and positional information in three separate MATLAB variables that can be readily used for analysis in MATLAB or exported for use in other software.
机载遥感数据（如高光谱图像、热成像视频、全帧RGB摄影）通常需要进行后处理，以便组合成一系列图像或拼接图进行分析。这一般是通过使用位置和姿态硬件（如全球导航卫星系统 - GNSS/惯性测量单元 - IMU）并结合专用软件来完成的。偶尔会出现GNSS/IMU仪器硬件故障，不过通过校正过程数据仍可恢复，该过程能实现图像配准以拼接数据。在此，我们展示一个简单且灵活的MATLAB®代码包，它是为组合基于视频的遥感数据而开发的。它首先应用迭代图像配准过程来对齐所有帧，若用户提供了预先存在的GPS信息则加以利用，然后将帧数据网格化以生成最终的单个拼接数据集，可用于分析。作为示例展示了使用野火的机载红外视频数据的该方法。•MATLAB函数很容易适应特定用户需求和数据集。•该方法在三个单独的MATLAB变量中输出组合数据和位置信息，这些变量可在MATLAB中直接用于分析，或导出供其他软件使用。
