Ghent University Academic Bibliography

Advanced

2D vision based measuring device for teat morphology in dairy cows

Ingrid Zwertvaegher, Jeroen Baert, Jürgen Vangeyte, Sarne De Vliegher UGent, Annelies Genbrugge UGent and Stephanie Van Weyenberg (2010) Production Diseases in Farm Animals, 14th International conference, Proceedings. p.103-103
abstract
Teat morphology is an important parameter in choosing the most appropriate teatcup liner for a herd since the interaction between teat and liner can strongly affect the milking characteristics and udder health. Nevertheless, information on teat morphology is very scarce and rarely sufficient for liner selection. Gathering information on large scale with current techniques is time consuming, subjective and not always accurate. However, the ability to measure teat parameters in an easy way and on large scale has many applications. This study presents a new vision based measuring technique for teat shape parameters. A camera is used to obtain a 2D image of the teat and image processing analyses to determine teat length and diameters. In addition, shape parameters of teat and teat end can be defined. The resolution in length and diameters is better than 0.5 mm. The error on the length of the teats that make an angle in the longitudinal plane of maximum 25° towards the camera, is no more than 5 %. To validate the repeatability of the measuring method, the teats of one Holstein cow were measured 5 times by 8 different members of a test panel of which 5 people were experienced in working with cows. Reproducibility was tested by measuring the teats of 7 Holstein cows by the same test panel. The teats of each cow were measured once in a defined order. The sequence in which the members measured the teats was randomized. No significant differences were found between the 5 successive measurements of one person on 3 teats. Significant differences in left-front teat measurements (p=0.002) were due to the lack of cow experience (p=0.022). Teat length measurements did not significantly differ between members of the test panel as long as teats could be easily reached. However, no significant differences were found for all teats between operators familiar with cows. In conclusion, a new accurate, repeatable and reproducible method was developed to measure teat parameters in all kinds of milking parlours. To obtain repeatable and reproducible results, some training in working in close interaction with cows is advised.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (meetingAbstract)
publication status
published
subject
keyword
image processing, dairy cows, teat morphology
in
Production Diseases in Farm Animals, 14th International conference, Proceedings
editor
Geert Opsomer UGent
pages
103 - 103
publisher
Ghent University
place of publication
Ghent, Belgium
conference name
14th International conference on Production Diseases in Farm Animals (ICPD)
conference location
Ghent, Belgium
conference start
2010-06-20
conference end
2010-06-24
ISBN
9789058642264
language
English
UGent publication?
yes
classification
C3
copyright statement
I have transferred the copyright for this publication to the publisher
id
1057193
handle
http://hdl.handle.net/1854/LU-1057193
date created
2010-10-11 11:19:54
date last changed
2017-10-24 13:23:03
@inproceedings{1057193,
  abstract     = {Teat morphology is an important parameter in choosing the most appropriate teatcup liner for a herd since the interaction between teat and liner can strongly affect the milking characteristics and udder health. Nevertheless, information on teat morphology is very scarce and rarely sufficient for liner selection. Gathering information on large scale with current techniques is time consuming, subjective and not always accurate. However, the ability to measure teat parameters in an easy way and on large scale has many applications. This study presents a new vision based measuring technique for teat shape parameters. A camera is used to obtain a 2D image of the teat and image processing analyses to determine teat length and diameters. In addition, shape parameters of teat and teat end can be defined. The resolution in length and diameters is better than 0.5 mm. The error on the length of the teats that make an angle in the longitudinal plane of maximum 25{\textdegree} towards the camera, is no more than 5 \%. To validate the repeatability of the measuring method, the teats of one Holstein cow were measured 5 times by 8 different members of a test panel of which 5 people were experienced in working with cows. Reproducibility was tested by measuring the teats of 7 Holstein cows by the same test panel. The teats of each cow were measured once in a defined order. The sequence in which the members measured the teats was randomized. No significant differences were found between the 5 successive measurements of one person on 3 teats. Significant differences in left-front teat measurements (p=0.002) were due to the lack of cow experience (p=0.022). Teat length measurements did not significantly differ between members of the test panel as long as teats could be easily reached. However, no significant differences were found for all teats between operators familiar with cows. In conclusion, a new accurate, repeatable and reproducible method was developed to measure teat parameters in all kinds of milking parlours. To obtain repeatable and reproducible results, some training in working in close interaction with cows is advised.},
  author       = {Zwertvaegher, Ingrid and Baert, Jeroen and Vangeyte, J{\"u}rgen and De Vliegher, Sarne and Genbrugge, Annelies and Van Weyenberg, Stephanie},
  booktitle    = {Production Diseases in Farm Animals, 14th International conference, Proceedings},
  editor       = {Opsomer, Geert},
  isbn         = {9789058642264},
  keyword      = {image processing,dairy cows,teat morphology},
  language     = {eng},
  location     = {Ghent, Belgium},
  pages        = {103--103},
  publisher    = {Ghent University},
  title        = {2D vision based measuring device for teat morphology in dairy cows},
  year         = {2010},
}

Chicago
Zwertvaegher, Ingrid, Jeroen Baert, Jürgen Vangeyte, Sarne De Vliegher, Annelies Genbrugge, and Stephanie Van Weyenberg. 2010. “2D Vision Based Measuring Device for Teat Morphology in Dairy Cows.” In Production Diseases in Farm Animals, 14th International Conference, Proceedings, ed. Geert Opsomer, 103–103. Ghent, Belgium: Ghent University.
APA
Zwertvaegher, Ingrid, Baert, J., Vangeyte, J., De Vliegher, S., Genbrugge, A., & Van Weyenberg, S. (2010). 2D vision based measuring device for teat morphology in dairy cows. In G. Opsomer (Ed.), Production Diseases in Farm Animals, 14th International conference, Proceedings (pp. 103–103). Presented at the 14th International conference on Production Diseases in Farm Animals (ICPD), Ghent, Belgium: Ghent University.
Vancouver
1.
Zwertvaegher I, Baert J, Vangeyte J, De Vliegher S, Genbrugge A, Van Weyenberg S. 2D vision based measuring device for teat morphology in dairy cows. In: Opsomer G, editor. Production Diseases in Farm Animals, 14th International conference, Proceedings. Ghent, Belgium: Ghent University; 2010. p. 103–103.
MLA
Zwertvaegher, Ingrid, Jeroen Baert, Jürgen Vangeyte, et al. “2D Vision Based Measuring Device for Teat Morphology in Dairy Cows.” Production Diseases in Farm Animals, 14th International Conference, Proceedings. Ed. Geert Opsomer. Ghent, Belgium: Ghent University, 2010. 103–103. Print.