This paper reviewed the developments of the last ten years in the field of international high-resolution earth observation, and introduced the developmental status and plans for China's high-resolution earth obser...This paper reviewed the developments of the last ten years in the field of international high-resolution earth observation, and introduced the developmental status and plans for China's high-resolution earth observation program. In addition, this paper expounded the transformation mechanism and procedure from earth observation data to geospatial information and geographical knowledge, and examined the key scientific and technological issues, including earth observation networks, high-precision image positioning, image understanding, automatic spatial information extraction, and focus services. These analyses provide a new impetus for pushing the application of China's high-resolution earth observation system from a "quantity" to "quality" change, from China to the world, from providing products to providing online service.展开更多
针对卫星上相机成像噪音高、灵敏度低以及国外垄断的问题,提出一种基于FPGA和国产CMOS图像传感器的空间相机成像系统设计,应用于小卫星的空间成像。系统采用高分辨率的国产CMOS图像传感器作为成像元件,使用Spartan-6系列的FPGA作为主控...针对卫星上相机成像噪音高、灵敏度低以及国外垄断的问题,提出一种基于FPGA和国产CMOS图像传感器的空间相机成像系统设计,应用于小卫星的空间成像。系统采用高分辨率的国产CMOS图像传感器作为成像元件,使用Spartan-6系列的FPGA作为主控芯片,CMOS输出图像信号进入FPGA进行缓存和排序,再通过Camera Link接口发送到上位机。实验结果表明,系统能采集到2 048×1 024像素大小的图片,图像信噪比高于36 d B,优于CMOS传感器技术手册提供的参考值31 d B,成像效果良好,能满足小卫星的空间成像要求。展开更多
基金supported by National Basic Research Program of China(Grant No. 2012CB719906)
文摘This paper reviewed the developments of the last ten years in the field of international high-resolution earth observation, and introduced the developmental status and plans for China's high-resolution earth observation program. In addition, this paper expounded the transformation mechanism and procedure from earth observation data to geospatial information and geographical knowledge, and examined the key scientific and technological issues, including earth observation networks, high-precision image positioning, image understanding, automatic spatial information extraction, and focus services. These analyses provide a new impetus for pushing the application of China's high-resolution earth observation system from a "quantity" to "quality" change, from China to the world, from providing products to providing online service.
文摘针对卫星上相机成像噪音高、灵敏度低以及国外垄断的问题,提出一种基于FPGA和国产CMOS图像传感器的空间相机成像系统设计,应用于小卫星的空间成像。系统采用高分辨率的国产CMOS图像传感器作为成像元件,使用Spartan-6系列的FPGA作为主控芯片,CMOS输出图像信号进入FPGA进行缓存和排序,再通过Camera Link接口发送到上位机。实验结果表明,系统能采集到2 048×1 024像素大小的图片,图像信噪比高于36 d B,优于CMOS传感器技术手册提供的参考值31 d B,成像效果良好,能满足小卫星的空间成像要求。
