Abstract
Information on the body shape of pigs is a key indicator to monitor their performance and health and to control or predict their market weight. Manual measurements are among the most common ways to obtain an indication of animal growth. However, this approach is laborious and difficult, and it may be stressful for both the pigs and the stockman. The present paper proposes the implementation of a Structure from Motion (SfM) photogrammetry approach as a new tool for on-barn animal reconstruction applications. This is possible also to new software tools allowing automatic estimation of camera parameters during the reconstruction process even without a preliminary calibration phase. An analysis on pig body 3D SfM characterization is here proposed, carried out under different conditions in terms of number of camera poses and animal movements. The work takes advantage of the total reconstructed surface as reference index to quantify the quality of the achieved 3D reconstruction, showing how as much as 80% of the total animal area can be characterized.
Highlights
The live weight (LW) of pigs is an important factor for managing various stages of its supply-chain [1]
LW data is of great interest for pig management, as it serves as an index for estimate animal growth [2], feed conversion efficiency [3], and health and disease occurrence [4,5]
As in the case of some other proposed techniques [10,11,12], the discussed Structure from Motion (SfM) can benefit from relatively low-cost technologies (100–1000 EUR), both for the cameras and for the three-dimensional reconstruction software
Summary
The live weight (LW) of pigs is an important factor for managing various stages of its supply-chain [1]. LW data is of great interest for pig management, as it serves as an index for estimate animal growth [2], feed conversion efficiency [3], and health and disease occurrence [4,5]. Girth measurement is one of the main indirect approaches and applied in pig weighing [11]. This approach is laborious and difficult, and it may be stressful for both the animals and the stockman [12]
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