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相关概念视频

Distance Corrections01:15

Distance Corrections

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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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Calibration Curves: Linear Least Squares01:20

Calibration Curves: Linear Least Squares

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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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Calibration Curves: Correlation Coefficient01:10

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In a linear calibration curve, there is a value called the calibration coefficient, denoted by 'r,' which measures the strength and the direction of association between two variables. The correlation coefficient value ranges from −1 to +1. A value of +1 indicates a perfect positive linear correlation, −1 denotes a perfect negative correlation, and 0 implies no correlation between the two variables. A positive correlation value establishes that as one variable increases, the...
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Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

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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.
39
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

378
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
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迪斯科皮:用于摄像机校准和校正的算法和软件.

Nghia T Vo1

  • 1National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA.

Journal of synchrotron radiation
|April 9, 2025
PubMed
概括
此摘要是机器生成的。

本研究提出了一种用于校准摄像头探测器的新方法,以纠正像辐射和视角扭曲等镜头扭曲. 迪斯科皮软件能够在断层扫描和计算机视觉等应用中进行准确的空间测量.

关键词:
体病是什么意思 体病是什么意思摄像机的校准 摄像机的校准光学中心的确定.扭曲了前景的扭曲.辐射扭曲的辐射扭曲是什么扫描断层扫描 (tomography) 是一个非常简单的方法.

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科学领域:

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

背景情况:

  • 检测器校准对于维度断层扫描,光学计量学和计算机视觉中的空间精度至关重要.
  • 现有的方法往往缺乏准确性,稳定性,易用性和处理各种扭曲的能力的平衡.
  • 辐射镜头扭曲在高分辨率的X射线探测器光学中普遍存在,用于基于同步光子的平行光束断层扫描.

研究的目的:

  • 开发和实施一种方法来单独描述和纠正辐射和视角扭曲.
  • 为了在使用单个光学目标图像进行探测器校准时实现子像素精度.
  • 为科学成像中透镜扭曲校正提供强大且易于使用的解决方案.

主要方法:

  • 使用单一的校准图像来描述辐射和视角扭曲.
  • 开发了算法来单独纠正光学中心偏移和镜头扭曲.
  • 在Discorpy软件包中实现了校正方法.

主要成果:

  • 从单一图像中成功地描述和纠正了辐射和视角扭曲.
  • 在经过校正后的空间测量中获得了高精度.
  • 证明了该软件能够处理探测器系统中常见的光学偏差.

结论:

  • 提出的方法为准确的摄像头和基于镜头的探测器校准提供了有效的解决方案.
  • 迪斯科皮软件为纠正复杂扭曲提供了强大的工具,提高了各种成像应用中的空间精度.
  • 这种方法简化了校准过程,同时保持了科学成像的高精度.