“航天清华一号”微小卫星及其图像处理

“Hangtian Tsinghua-1” Micro-Satellite and Its Image Processing

介绍了“航天清华一号”微小卫星的研究背景和主要技术指标。讨论了星上图像智能处理的方案 ,包括云检测和图像压缩两个部分 。

In this paper, we introduce the research background and key technical parameters of “Hangtian Tsinghua_1” micro_satellite. The scheme of on_board image intelligent processing, which includes cloud detection and image compression, is discussed in detail. Cloud detection is based on the cloud's brightness character and we use gray threshold method to achieve image segmentation through the analysis of image histogram. Image compression method is a mend of Block Truncation Coding method that implements three_level compression according to the activity of the image block. All on_board image processing tasks are fulfilled by the Transputer processor. The image processing work on the ground mainly including noise removal and image correction is discussed in the end.