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High efficient optical remote sensing images acquisition for Nano-satellite-framework

机译：用于纳米卫星框架的高效光学遥感图像采集

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摘要

It is more difficult and challenging to implement Nano-satellite (NanoSat) based optical Earth observation missions than conventional satellites because of the limitation of volume, weight and power consumption. In general, an image compression unit is a necessary onboard module to save data transmission bandwidth and disk space. The image compression unit can get rid of redundant information of those captured images. In this paper, a new image acquisition framework is proposed for NanoSat based optical Earth observation applications. The entire process of image acquisition and compression unit can be integrated in the photo detector array chip, that is, the output data of the chip is already compressed. That is to say, extra image compression unit is no longer needed; therefore, the power, volume, and weight of the common onboard image compression units consumed can be largely saved. The advantages of the proposed framework are: the image acquisition and image compression are combined into a single step; it can be easily built in CMOS architecture; quick view can be provided without reconstruction in the framework; Given a certain compression ratio, the reconstructed image quality is much better than those CS based methods. The framework holds promise to be widely used in the future.
机译：由于体积，重量和功耗的局限性，与常规卫星相比，实施基于纳米卫星（NanoSat）的光学地球观测任务更加困难和挑战。通常，图像压缩单元是必不可少的板载模块，以节省数据传输带宽和磁盘空间。图像压缩单元可以摆脱那些捕获的图像的冗余信息。本文针对基于NanoSat的光学地球观测应用提出了一种新的图像采集框架。图像采集和压缩单元的整个过程可以集成在光电探测器阵列芯片中，也就是说，芯片的输出数据已经被压缩。也就是说，不再需要额外的图像压缩单元。因此，可以大大节省所消耗的普通车载图像压缩单元的功率，体积和重量。所提出的框架的优点是：将图像获取和图像压缩合并为一个步骤；它可以很容易地以CMOS架构构建；无需重新构建框架即可提供快速查看；在给定一定的压缩比的情况下，重建的图像质量比那些基于CS的方法要好得多。该框架有望在将来得到广泛使用。

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