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针对推扫式遥感成像,基于压缩感知(CS)理论,提出一种利用低密度探测器获取高分辨率遥感图像的新方法。在推扫过程中,采用可编码的行间转移面阵电荷耦合器件(CCD)并使其工作于时间延迟积分(TDI)模式,在随机曝光控制电路的控制下实现对场景信息的编码感知;通过计算成像,从感知的数据中重构出高分辨率遥感图像。这种基于CCD-TDI模式编码感知的高分辨率遥感计算成像方法,可以增强成像分辨率和提高输出图像信噪比。仿真结果验证了本文方法的有效性。
Aiming at push-push remote sensing imaging, a new method of acquiring high-resolution remote sensing images using low-density detectors is proposed based on the theory of compressive sensing (CS). In the process of push-scanning, a programmable inter-row transfer CCD (Charge-Coupled Device) is used and it works in time delay integration (TDI) mode to realize the coding perception of scene information under the control of random exposure control circuit. By computational imaging, high-resolution remote sensing images are reconstructed from the perceived data. This high-resolution remote sensing imaging algorithm based on CCD-TDI coding perception can enhance the imaging resolution and improve the output signal-to-noise ratio. Simulation results verify the effectiveness of the proposed method.