CAJ | 학술논문

大气湍流干扰空中目标的成像探测，使得观测到的目标图像是严重抖动和模糊的。文章研究了这些抖动和模糊效应，总结了湍流流场的统计特性和光在大气中的传输特性，具体分析了湍流效应退化图像的特征。采用包含了湍流内外尺度影响的波结构函数、折射率谱以及成像系统退化函数的新退化模型，相比Kolmogorov谱模型，该模型引入了更完整的先验约束条件，更接近大气湍流的物理特性。通过对计算结果进行分析，验证了退化模型的合理性，并对图像退化给出了定量的描述。对进一步进行湍流效应退化图像校正算法研究具有重要意义。结果表明采用了改进的Kolmogorov谱模型的图像的退化效果更加接近真实的退化情况。
대기단류간우공중목표적성상탐측，사득관측도적목표도상시엄중두동화모호적。문장연구료저사두동화모호효응，총결료단류류장적통계특성화광재대기중적전수특성，구체분석료단류효응퇴화도상적특정。채용포함료단류내외척도영향적파결구함수、절사솔보이급성상계통퇴화함수적신퇴화모형，상비Kolmogorov보모형，해모형인입료경완정적선험약속조건，경접근대기단류적물리특성。통과대계산결과진행분석，험증료퇴화모형적합이성，병대도상퇴화급출료정량적묘술。대진일보진행단류효응퇴화도상교정산법연구구유중요의의。결과표명채용료개진적Kolmogorov보모형적도상적퇴화효과경가접근진실적퇴화정황。
Imaging detection of air-target is disturbed by the atmospheric turbulence,and the target image is badly jit-tered and blurred.In this paper, the statistical characteristics of turbulent flow field and optical propagation properties in the atmosphere are summarized, the characteristics of the turbulence effect degraded images are analyzed. The new model is derived from the wave structure function and refractive index profiles considering turbulence internal and exter-nal scale and thin lens imaging degradation function. Compared with the model derived from Kolmogorov spectrum, more complete transcendent constraints is introduced in the new model, and the model is more similar to the physical characteristics of atmospheric turbulence. Based on the analysis of calculation results, the rationality of the degradation model is testified,and the quantitative description to the degraded image is given.