论文部分内容阅读
大多数光电成像系统的空间分辨率都与探测器的元数密切相关,增加探测器的元数是提高成像系统空间分辨率的核心问题之一。在不增加探测器元数的前提下,提高空间分辨率的技术途径之一就是超分辨重建技术,它通过增加探测器采样频率来提高探测器的空间分辨率。考虑到探测器的空间分辨率并不完全取决于采样作用,且受像元孔径效应的影响,提出了一种赋形像元探测器。基于巴比涅原理中的互补屏原则,将原有的红外探测器中的每个正矩形像元去掉1/4,用剩余部分来等效获取去掉部分的高截止频率;同时利用两列赋形像元探测器进行亚像元推扫,结合像元细分算法,实现超分辨重建。通过同时提高系统采样频率和探测器的截止频率来实现红外系统最终的高分辨率重建成像。
The spatial resolution of most optoelectronic imaging systems is closely related to the number of detectors. Increasing the number of detectors is one of the core issues in improving the spatial resolution of an imaging system. Without increasing the number of detectors, one of the ways to increase the spatial resolution is through super-resolution reconstruction, which increases the spatial resolution of the detector by increasing the sampling frequency of the detector. Considering that the spatial resolution of the detector does not depend entirely on the sampling effect and is affected by the aperture effect of the pixel, a shaped pixel detector is proposed. Based on the principle of complementary screen in the principle of Barbizian, each positive rectangular pixel in the original infrared detector is removed by 1/4, and the remaining part is used to obtain the high cut-off frequency equivalently; and at the same time, The pixel detector performs sub-pixel sweeping, combined with pixel segmentation algorithm to achieve super-resolution reconstruction. The final high-resolution reconstruction of the infrared system is achieved by increasing both the system sampling frequency and the detector’s cut-off frequency.