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Time-related properties are a critical type of extrafunctionalrequirements for designing real-time systems. Modeling and validating time-related properties at therequirements specification and analysis phases is important forthe successful development of real-time systems in terms of cost, quality and productivity. In the literature and practice, timinganalyses (e.g., Worst Case Execution Time) are...
This paper presents a FPGA (Field Programmable Gate Array)-based remotely sensed imagery denoising method, named FPGA-based median filtering. The proposed method is capable of processing large volume data since it takes full advantages of FPGA hardware and abundant logic units. This paper first overviews the traditional median filtering algorithm, and then highlights the FPGA-based filtering, including...
On-orbit geometric calibration is a critical and essential step to guarantee the high geometric positioning accuracy of high-resolution optical satellite imagery. In this paper, we first review and summarize the on-orbit geometric calibration methods for high-resolution optical satellite and then analyze their advantages and disadvantages. Finally, we present our perspective on on-board geometric...
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