High-resolution satellite images such as KOMPSAT-3 data provide detailed geospatial information over interest areas that are evenly located in an inaccessible area. The high-resolution satellite cameras are designed with a long focal length and a narrow field of view to increase spatial resolution. Thus, images show relatively narrow swath widths (10–15 km) compared to dozens or hundreds of kilometers in mid-/low-resolution satellite data. Therefore, users often face obstacles to orthorectify and mosaic a bundle of delivered images to create a complete image map. With a single mosaicked image at the sensor level delivered only with radiometric correction, users can process and manage simplified data more efficiently. Thus, we propose sensor-level mosaicking to generate a seamless image product with geometric accuracy to meet mapping requirements. Among adjacent image data with some overlaps, one image is the reference, whereas the others are projected using the sensor model information with shuttle radar topography mission. In the overlapped area, the geometric discrepancy between the data is modeled in spline along the image line based on image matching with outlier removals. The new sensor model information for the mosaicked image is generated by extending that of the reference image. Three strips of KOMPSAT-3 data were tested for the experiment. The data showed that irregular image discrepancies between the adjacent data were observed along the image line. This indicated that the proposed method successfully identified and removed these discrepancies. Additionally, sensor modeling information of the resulted mosaic could be improved by using the averaging effects of input data.

中文翻译：

---

Multistrip KOMPSAT-3 Level 1R 产品的传感器级马赛克

KOMPSAT-3 数据等高分辨率卫星图像可提供详细的地理空间信息，涵盖均匀分布在无法进入区域的感兴趣区域。高分辨率卫星相机采用长焦距和窄视场设计，以提高空间分辨率。因此，与中/低分辨率卫星数据中的数十或数百公里相比，图像显示的条带宽度相对较窄（10-15 公里）。因此，用户在对一组交付的图像进行正射校正和拼接以创建完整的图像地图时经常面临障碍。使用仅通过辐射校正提供的传感器级别的单个镶嵌图像，用户可以更有效地处理和管理简化的数据。因此，我们提出传感器级镶嵌来生成具有几何精度的无缝图像产品，以满足映射要求。在有一些重叠的相邻图像数据中，一个图像是参考图像，而其他图像是使用传感器模型信息与航天飞机雷达地形任务一起投影的。在重叠区域，数据之间的几何差异基于图像匹配和异常值去除以样条沿图像线建模。镶嵌图像的新传感器模型信息是通过扩展参考图像的信息生成的。为实验测试了三条 KOMPSAT-3 数据。数据显示，沿图像线观察到相邻数据之间的不规则图像差异。这表明所提出的方法成功地识别并消除了这些差异。此外，可以通过使用输入数据的平均效果来改进生成的马赛克的传感器建模信息。