基于FPGA的速率自适应图像抽取算法

摘要

载荷图像可视化是深空探测任务中的重要需求，但受信道带宽的限制，无法实时传输所有载荷数据，因此星载复接存储器中图像的抽取下传是实现任务可视化的关键。设计了一种载荷图像抽取方法，适用于深空探测航天器载荷自主管理和可视化应用。通过图像帧识别、指针管理和数据筛选实现图像抽帧回放算法，具有图像完整、实时，速率自适应的特点。该方法在某探测器工程项目中采用FPGA进行了实现，经测试、试验验证，满足工程可视化要求。%The visualization of payload image is one of the important requirements of deep space exploration. However,sub-jected to the limit of channel bandwidth,it’s unable to transmit all the images in real-time. So image extraction and download from the satellite borne multiple connection storage is the key to realize the task visualization. An approach of image extraction is designed,which is suitable for payload self-management and visualization applications in deep space exploration. The image playback is realized through image frame identification,pointer management and data filtering,which has the characteristics of image integrity,real-time and rate adaptation. The method is realized by using FPGA in some spacecraft project. Test results in-dicate that the approach fully meets the requirement of project visualization.