109638 20260505135412.0 doi 10.1016/j.animal.2021.100212 sideral 126111 ART-2021-126111 eng Samperio, E Universidad de Zaragoza (orcid)0000-0002-1425-3549 Lambs' live weight estimation using 3D images 2021 Access copy available to the general public Unrestricted The sheep sector has not suffered the technification that other livestock sectors have. The lack of technological knowledge of the farmers and the economic limitations of the sector have made this technification difficult. One of the most widely used technologies is Precision Livestock Farming (PLF). PLF has already been used in other livestock sectors to improve farming efficiency. In the light of the problem that sheep farmers have in weighing lambs and their low precision, this paper proposes a system for estimating weight by means of 3D image capture. Thus, zenithal images of 272 lambs have been recorded. They have been processed using the capture of the upper area and the average depth of the pixels of the lamb. This estimates the weight of the animal with an error of less than 6%. This technology has a low economic cost and is easy to operate, helping farmers to be more willing to use it. This method manages to reduce the duration of the process, the stress of the animal and to improve the overall accuracy in weight estimation. Thus, it will help to have a greater control of the weight of the animal and to improve the economic profitability that the farmer obtains for the lambs. (C) 2021 The Authors. Published by Elsevier B.V. on behalf of The Animal Consortium. info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 3.73 2021 VETERINARY SCIENCES 10 / 145 = 0.069 2021 Q1 T1 AGRICULTURE, DAIRY & ANIMAL SCIENCE 8 / 62 = 0.129 2021 Q1 T1 0.834 2021 Animal Science and Zoology 2021 Q1 5.7 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Lidon, I Universidad de Zaragoza (orcid)0000-0003-2558-982X Rebollar, R Universidad de Zaragoza (orcid)0000-0002-7891-609X Castejon-Limas, M Alvarez-Aparicio, C 5002 720 Universidad de Zaragoza Dpto. Ingeniería Diseño Fabri. Área Proyectos de Ingeniería 15, 5 (2021), 100212 [8 pp] Animal ANIMAL 1751-7311 1169586 http://zaguan.unizar.es/record/109638/files/texto_completo.pdf Versión publicada 2830240 http://zaguan.unizar.es/record/109638/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:109638 articulos driver 2026-05-05-13:52:58 ARTICLE