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相关概念视频

Calibration Curves: Linear Least Squares01:20

Calibration Curves: Linear Least Squares

A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
For data that follow a straight line, the standard method for fitting is the linear...

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相关实验视频

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Video-oculography in Mice
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以瞳孔为中心的成像模型用于变焦相机校准.

Hang Shang, Changying Liu

    Optics letters
    |October 15, 2024
    PubMed
    概括

    这项研究引入了一个新的以学生为中心的成像模型,用于变焦相机校准,通过解决各种变焦设置中的扭曲来提高准确性. 这种新方法比现有技术提供了更好的测量精度.

    科学领域:

    • 计算机视觉 计算机视觉
    • 光学工程是指光学工程.
    • 计量学 计量学 计量学

    背景情况:

    • 缩放摄像头的校准是复杂的,因为变化的参数与变焦和变焦.
    • 现有的针孔模型缺乏几何约束,导致合的校准参数和不准确性.
    • 像辐射,偏离和胡须效应这样的扭曲与变焦设置有很大的不同.

    研究的目的:

    • 开发一种新的以学生为中心的成像模型,用于精确的变焦相机校准.
    • 为了物理解释和建模不同的镜头扭曲在不同的变焦水平.
    • 与当前最先进的校准方法相比,提高测量精度.

    主要方法:

    • 提出了一个以瞳孔为中心的成像模型,其中包含出口瞳孔偏移和非正面镜头传感器模型.
    • 在多个变焦设置下考虑了辐射,偏离和胡须扭曲.
    • 采用全局优化与初始摄像头校准和捆绑调整在各种变焦/自动对焦组合.

    主要成果:

    • 以学生为中心的模型有效地处理不同变焦级别的扭曲.
    • 全球优化改进了校准参数,以提高精度.
    • 实验结果显示,相对于现有方法,相对测量准确度更高.

    更多相关视频

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    Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior
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    结论:

    • 拟议的以瞳孔为中心的成像模型为变焦相机校准提供了一种基于物理的方法.
    • 这种方法显著提高了对有可变焦距的相机的校准精度.
    • 这些发现代表了摄像机计量学领域的显著进展.