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相关概念视频

Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

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When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
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Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
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On many occasions, physicists, other scientists, and engineers need to make estimates of a particular quantity. These are sometimes referred to as guesstimates, order-of-magnitude approximations, back-of-the-envelope calculations, or Fermi calculations. The physicist Enrico Fermi was famous for his ability to estimate various kinds of data with surprising precision. Estimating does not mean guessing a number or a formula at random. Instead, estimation means using prior experience and sound...
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Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement (a unit), and an indication of the uncertainty of the measurement. While the number and unit are explicitly represented when a quantity is written, the uncertainty is an aspect of the errors in the measurement results.
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The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length, mass, time, temperature, electric current, amount of substance, and luminosity. These are called the SI base units.
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基于DUOS-PointNet+的牛体型测量

Zhi Weng1,2,3, Wenzhi Lin1,2,3, Zhiqiang Zheng1,2,3

  • 1State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot 010021, China.

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|September 14, 2024
PubMed
概括
此摘要是机器生成的。

一个新的牛体尺寸测量系统使用动态不平衡十三分组 (DUOS) 算法进行准确的非接触体型测量. 这种方法提高了细分精度,并实现了关键车身尺寸的低相对误差.

关键词:
在 PointNet++++ 中使用.身体尺寸测量测量身体尺寸测量点云点云是指点云.

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科学领域:

  • 农业工程 农业工程
  • 计算机视觉 计算机视觉
  • 动物科学动物科学

背景情况:

  • 使用点云数据测量非接触式牲畜体型测量通常是复杂的,容易出现错误.
  • 准确的体型测量对于畜牧管理,繁殖和健康监测至关重要.

研究的目的:

  • 利用点云数据开发一个高效准确的牛体测量系统.
  • 引入一种新的算法,即动态不平衡八位数分组 (DUOS),以改进细分和测量.

主要方法:

  • 一个牛体测量系统,集成了DUOS算法 (基于PointNet++) 和一个高效的测量方法.
  • 该系统将牛分为七个部分 (身体,腿) 并确定关键的测量点.
  • 技术包括密度测量,点云切片,轮提取和点云修复.

主要成果:

  • 与其他模型相比,DUOS算法提高了0.53%的细分精度和1.21%的平均交叉点.
  • 手动测量与实验测量的相对误差是:腰部高度 (1.18%),部高度 (1.34%),身体长度 (2.52%),胸围 (2.12%),腹围 (2.26%) 和大炮周围 (2.78%).

结论:

  • 拟议的系统通过点云数据证明了牛体的有效细分.
  • 该系统适用于准确的,非接触式牛体型测量,比现有方法提供更高的精度.