Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

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

Design Example: Measuring Distance Between Two Points with Obstructions

28
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...
28
Distance Measurements by Taping01:18

Distance Measurements by Taping

30
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...
30
Estimation of the Physical Quantities01:05

Estimation of the Physical Quantities

4.2K
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...
4.2K
Measurement: Standard Units03:38

Measurement: Standard Units

61.1K
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.
61.1K
Measurement: Derived Units03:02

Measurement: Derived Units

42.9K
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.
42.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Acoustic characterization of sperm whale (Physeter macrocephalus) population structure and social organization in the South China Sea.

The Journal of the Acoustical Society of America·2026
Same author

Disentangle the Ecological Impact of Vessel Activities on Delphinids Ranging Strategy: An Interaction Probability Perspective.

Integrative zoology·2026
Same author

Real-Time Beef Cattle Body Condition Scoring Using EdgeBCS-YOLO: A Lightweight Framework for Edge Deployment.

Animals : an open access journal from MDPI·2026
Same author

YOLOv8-DMC: Enabling Non-Contact 3D Cattle Body Measurement via Enhanced Keypoint Detection.

Animals : an open access journal from MDPI·2025
Same author

Distribution pattern of cetaceans in the northern South China Sea based on visual surveys and environmental DNA metabarcoding.

Conservation biology : the journal of the Society for Conservation Biology·2025
Same author

Modeling Life History Parameters in Marine Mammals: Bayesian Hierarchical Analysis of Ontogenetic Dietary Shifts in Indo-Pacific Humpback Dolphins.

Ecological and evolutionary physiology·2025
Same journal

Correction: Gernhardt et al. Ex Vivo Computed Tomographic Morphometry and Motion of the Native and Fractured Equine Accessory Carpal Bone. <i>Animals</i> 2026, <i>16</i>, 1132.

Animals : an open access journal from MDPI·2026
Same journal

Camera-Trap Assessment of Terrestrial Mammals and Ground-Dwelling Birds in the Zhangjiajie Chinese Giant Salamander National Nature Reserve, China.

Animals : an open access journal from MDPI·2026
Same journal

Beyond the Mission: Long-Term Endocrine Dynamics in Search and Rescue Dog-Handler Teams.

Animals : an open access journal from MDPI·2026
Same journal

Phenotypic Characterisation of the Abruzzo Donkey (<i>Equus asinus</i>), an Endangered Italian Genetic Resource: Body Measurements.

Animals : an open access journal from MDPI·2026
Same journal

Assessment of Maternal Genetic Diversity and Mitochondrial Population Structure of Endangered Indigenous Chicken Breeds in China.

Animals : an open access journal from MDPI·2026
Same journal

Effects of Expected Progeny Difference and Feeding Systems on Carcass Characteristics in Hanwoo Steers.

Animals : an open access journal from MDPI·2026
See all related articles

Related Experiment Video

Updated: Jun 13, 2025

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
09:32

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Published on: November 20, 2017

9.2K

Cattle Body Size Measurement Based on DUOS-PointNet+.

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.

Animals : an Open Access Journal From MDPI
|September 14, 2024
PubMed
Summary
This summary is machine-generated.

A new cattle body measuring system uses a dynamic unbalanced octree grouping (DUOS) algorithm for accurate non-contact body size measurement. This method improves segmentation accuracy and achieves low relative errors for key body dimensions.

Keywords:
PointNet++body size measurementpoint clouds

More Related Videos

Stereo-Imaging System DLT Calibration to Capture 3D In Situ Displacements of Stretched Peripheral Nerves
06:26

Stereo-Imaging System DLT Calibration to Capture 3D In Situ Displacements of Stretched Peripheral Nerves

Published on: January 12, 2024

353
Non-invasive Skeletal Muscle Quantification in Small Animals Using Micro-computed Tomography
07:33

Non-invasive Skeletal Muscle Quantification in Small Animals Using Micro-computed Tomography

Published on: November 8, 2024

363

Related Experiment Videos

Last Updated: Jun 13, 2025

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
09:32

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Published on: November 20, 2017

9.2K
Stereo-Imaging System DLT Calibration to Capture 3D In Situ Displacements of Stretched Peripheral Nerves
06:26

Stereo-Imaging System DLT Calibration to Capture 3D In Situ Displacements of Stretched Peripheral Nerves

Published on: January 12, 2024

353
Non-invasive Skeletal Muscle Quantification in Small Animals Using Micro-computed Tomography
07:33

Non-invasive Skeletal Muscle Quantification in Small Animals Using Micro-computed Tomography

Published on: November 8, 2024

363

Area of Science:

  • Agricultural Engineering
  • Computer Vision
  • Animal Science

Background:

  • Non-contact livestock body size measurement using point cloud data is often complex and error-prone.
  • Accurate body measurements are crucial for livestock management, breeding, and health monitoring.

Purpose of the Study:

  • To develop an efficient and accurate cattle body measuring system using point cloud data.
  • To introduce a novel algorithm, dynamic unbalanced octree grouping (DUOS), for improved segmentation and measurement.

Main Methods:

  • A cattle body measuring system integrating the DUOS algorithm (based on PointNet++) and an efficient measurement method.
  • The system segments cattle into seven parts (body, legs) and identifies key measurement points.
  • Techniques include density measurement, point cloud slicing, contour extraction, and point cloud repair.

Main Results:

  • The DUOS algorithm enhanced segmentation accuracy by 0.53% and mean intersection by 1.21% compared to other models.
  • Relative errors for manual vs. experimental measurements were: withers height (1.18%), hip height (1.34%), body length (2.52%), thoracic circumference (2.12%), abdominal circumference (2.26%), and cannon circumference (2.78%).

Conclusions:

  • The proposed system demonstrates effective segmentation of cattle bodies from point cloud data.
  • The system is suitable for accurate, non-contact cattle body size measurement, offering improved precision over existing methods.