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相关概念视频

Focusing of Light in the Eye01:16

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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

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During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
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在单镜头计算成像系统设计中的通用偏差规范化.

Zongling Li, Fanjiao Tan, Rongshuai Zhang

    Optics letters
    |October 13, 2023
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    概括

    通用异常规化 (GAR) 通过共同设计镜头和算法来改进计算成像. 这种方法保留了当前系统中丢失的高分辨率细节,提高了图像质量.

    科学领域:

    • 光学是什么?光学是什么?光学是什么?
    • 计算成像技术的成像
    • 图像恢复 图像恢复

    背景情况:

    • 单镜头计算成像系统面临异常模糊的挑战.
    • 现有的镜头和恢复算法之间的共同设计方法不能完全解决由于特定偏差而导致的高分辨率信息丢失.

    研究的目的:

    • 开发一种新的共同设计方法,克服当前计算成像方法的局限性.
    • 专门针对和限制降低高频信息的异常.

    主要方法:

    • 研究了各种异常对计算成像质量的影响.
    • 拟议的通用偏差调节 (GAR) 限制影响高频调制转移函数 (MTF) 的偏差.
    • 共同设计的单一镜头和恢复算法,包括GAR.

    主要成果:

    • 确定了标准恢复算法无法纠正的特定异常,导致高分辨率信息丢失.
    • GAR有效地限制了有害的误差,保留了高频细节.
    • 实验结果显示,与现有的共同设计方法相比,高分辨率信息恢复显著改善.

    结论:

    • 与GAR共同设计镜头和修复算法可以提高计算成像性能.

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  • 在恢复图像中,GAR对于保持高分辨率信息至关重要.
  • 拟议的方法为单镜头计算成像系统提供了显著的进步.