共查询到12条相似文献,搜索用时 15 毫秒
1.
2.
7.
据不完全统计,在我国城市中约有三分之一的人患有屈光不正.眼镜是人类应用最广泛的一种矫正屈光不正眼的医疗工具之一,它的光学原理是什么呢?本文就这一问题做如下讨论. 相似文献
8.
9.
视力近视者在使用近视眼镜来矫正视力后,当遇到强光照射,会对近视者眼睛造成伤害.通过在近视眼镜的内侧加装偏振片,来消除强光对近视者眼睛的影响. 相似文献
10.
11.
基于目标和点扩展函数联合估计的点源目标图像近视解卷积 总被引:4,自引:7,他引:4
在传统的基于波前探测的解卷积方法中,由波前探测得到的点扩展函数被认为是精确的,并用维纳滤波进行复原,但是点扩展函数不可避免地存在误差,所以最终的复原目标图像质量不佳.为了解决该难题,提出了基于目标和点扩展函数联合估计的图像近视解卷积算法.它运用了点扩展函数和目标的先验信息,对点扩展函数和目标进行了规整和进一步约束,从而得到更优的恢复图像质量.对该方法的原理和实现过程进行了阐述,并将其运用于室内点源目标数据中.实验结果证明,与维纳滤波方法相比,该方法使图像恢复的效果得到明显改善. 相似文献
12.
Accommodation and convergence play critical roles in the natural process of depth perception, and the field of natural three-dimensional (3D) perception in stereo displays has been extensively explored. However, no prototypes of these natural 3D displays are suitable for wear due to the system size and weight. In addition, few of the researches have involved subjects with ametropia. We propose and develop an optical see-through head-mounted display (HMD) capable of diopter adjustment of both the virtual image and the real world scene. The prototype demonstrates a diagonal field of view (NOV) of 42° and an exit pupil diameter of 9 mnl, and a diopter adjustment range of -5.5D to 0D. Depth adjustment of virtual image is demonstrated with experiments, the results show the HMD can be further used to investigate the accommodation and convergence cues in depth perception in AR environment, particularly for users with different degree of the ametropia. 相似文献