基于均方根误差和相关系数评价人眼像差对视网膜像质的影响

发布时间：2018-04-12 11:54

本文选题：视觉光学 + 自适应光学　；参考：《光学学报》2017年03期

【摘要】：视网膜成像质量的下降会减弱视力等视觉功能,直接影响人们的日常生活。人眼像差是影响其像质的主要因素,为了提高视网膜像质,常用自适应光学矫正人眼像差,以获得接近衍射极限的分辨力或理想像质。矫正波前像差的过程需要以分辨力或像质的评价作为依据。其评价方法大致分为基于瞳孔面和成像面两种,这两种方法主要表征成像系统的分辨力,但不能直观和定量地评价像质。而基于成像面的光学传递函数(OTF)法需要借助曲线面积等才能定量地评价像质,且不同空间频率的像质不同。为此,计算携带人眼像差的OTF,以此模拟人眼成像过程,直观地表征了像质变化。并重新定义均方根误差和相关系数,分析人眼像差对它们的影响,量化地反映各项像差矫正前后的像质变化。
[Abstract]:The decline of retinal imaging quality will weaken visual function such as vision and directly affect people's daily life.Human eye aberration is the main factor affecting its image quality. In order to improve retinal image quality, adaptive optics is commonly used to correct human eye aberration to obtain resolution or ideal image quality close to the diffraction limit.The correction of wavefront aberrations should be based on the evaluation of resolution or image quality.There are two kinds of evaluation methods based on pupil surface and imaging surface. These two methods mainly represent the resolution of the imaging system, but can not directly and quantitatively evaluate the image quality.However, the optical transfer function (OTF) method based on imaging surface can quantitatively evaluate the image quality with the aid of curve area, and the image quality of different spatial frequency is different.Therefore, the OTFs carrying human aberrations are calculated to simulate the imaging process of human eyes and directly characterize the changes of image quality.The root mean square error and correlation coefficient are redefined to analyze the influence of human eye aberration on them and to quantitatively reflect the changes of image quality before and after correction of each aberration.
【作者单位】：中国科学院光电技术研究所;中国科学院大学;中国科学院自适应光学重点实验室;
【基金】：国家863计划(SQ2015AA0201627)
【分类号】：R770.4;TP391.41

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