微位移法消减空间抽样折叠混淆效应的相位理论分析

空间积分抽样相位理论分析为消减欠采样产生的折叠混淆效应提供了理论依据。在凝视型红外焦平面热像系统中，探测单元的物理尺寸和间距决定了空间采样频率。而被探测场景的空间频率往往要高于红外焦平面阵列探测单元重复频率的一半，这种欠采样所产生的折叠混淆效应严重损坏了图像质量。本文总结了前人对此问题的讨论，在此基础上给出了旨在指导消减该混淆效应的较为完整的理论，并对微扫描及非控制情况下微位移的超分辨率技术进行了分析。

Theoretical Analysis of Spatial Sampling Aliasing Reduction through Micro-shift

Phase theory analysis of spatial integral sampling provide theoretical basis for under sampling aliasing reduction. In the imaging process of staring infrared FPA, spatial-sampling frequency is determined by physical size and spa t ial distance of detecting unit. While the spatial frequency of the detected scen e is always more than half of the sampling frequency of staring infrared FPA, un der-sampling happened, and the quality and utility of the image will be serious l y degraded by aliasing. In this paper, theoretical analyses of forerunners are c oncluded, an integrated novel theoretical analysis on aliasing reduction is put forward, and micro-scan and uncontrolled micro-shift super-resolution technol ogy is analyzed.