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相关概念视频

Methods of Obtaining Topography01:25

Methods of Obtaining Topography

121
Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
121
Topographic Surveying and Contours01:29

Topographic Surveying and Contours

264
Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
264
Computed Tomography01:10

Computed Tomography

6.3K
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Plotting of Topographic Maps01:29

Plotting of Topographic Maps

149
Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...
149
Distance Corrections01:15

Distance Corrections

89
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...
89
Adjusting a Traverse01:12

Adjusting a Traverse

107
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
107

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相关实验视频

Updated: Sep 16, 2025

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
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计算自纠正量化3D地形成像计算自纠正量化3D地形成像

Lena Zhukova1,2, Roger Artigas1,2, Guillem Carles3

  • 1Sensofar-Tech S.L., Crta. BV-1274 Km.1, 08225, Terrassa, Spain.

Scientific reports
|July 7, 2025
PubMed
概括

本研究介绍了一种计算方法来纠正3D显微镜中的扫描器错误,显著提高了对焦显微镜的测量精度. 该技术提高了十倍的轴向精度,为微尺度几何测量提供了具有成本效益的解决方案.

关键词:
三维显微镜的3D显微镜通过光学造型测量,可以测量光学造型.表面计量学 表面计量学

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Last Updated: Sep 16, 2025

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科学领域:

  • 计量学 计量学 计量学
  • 显微镜的使用方法
  • 计算成像技术的成像

背景情况:

  • 三维 (3D) 显微镜对于科学和工业中的微尺度几何测量至关重要.
  • 在3D显微镜中,传统的轴向扫描方法容易出现来自不完美的扫描器运动的错误.
  • 对干涉测量系统来说,错误校正已经确立,但对于像共聚焦显微镜这样的非干涉测量技术来说,它仍然是一个挑战.

研究的目的:

  • 开发和验证用于估计和抑制3D显微镜中扫描仪定位错误的计算方法.
  • 为了提高非干涉度显微镜系统,特别是共聚焦显微镜的轴向测量的精度.
  • 为昂贵的硬件升级提供一个具有成本效益的替代方案,以提高测量精度.

主要方法:

  • 开发了一种新的计算分析技术来处理获得的3D显微镜数据.
  • 该方法在轴向扫描过程中估计和纠正扫描器定位错误.
  • 实验验证是在使用机动扫描仪的共聚焦显微镜系统上进行的.

主要成果:

  • 在共聚焦显微镜系统的轴精度得到了十倍的改进.
  • 该方法的性能与高质量的压电扫描仪的性能相匹配或超过.
  • 该技术保留了电动线性阶段特有的大测量范围.

结论:

  • 提出的计算方法有效地纠正了3D共聚焦显微镜中的扫描仪定位错误.
  • 这种方法可以显著提高测量精度,而不需要昂贵的硬件.
  • 该方法易于集成到现有系统中,为高精度3D计量提供了实用和经济的解决方案.