Digital image analysis to estimate the live weight of broiler

Use of dual-energy x-ray absorptiometry in non-ruminant nutrition research

“…A fast, accurate, minimally invasive method that requires little input is considered the ideal for providing information about the animal (Mitchell et al, 2003). Methods currently used in nutrition research include linear body measurements (Maiwashe et al, 2002;Riva et al, 2004), ultrasonography for measuring backfat, muscle depth, and loin eye area (Liu and Stouffer, 1995;Oviedo-Rondón et al, 2007;Case et al, 2012), total body electrical conductivity (Berg et al, 1994;Dänicke et al, 2001;Fortun-Lamothe et al, 2002), video image analysis (McClure et al, 2003;Mollah et al, 2010;Craigie et al, 2012), dual-energy x-ray absorptiometry (DXA; Mitchell et al, 1997a;Marcoux et al, 2003; R. Bras. Zootec., 46(7):621-629, 2017 Mercier et al, 2006), computed tomography (CT;Font-iFurnols et al, 2013;Milisits et al, 2013), and magnetic resonance imaging (MRI; Davenel et al, 2000;Kremer et al, 2012b).…”

Optical Methods and Techniques for Meat Quality Inspection

“…Machine vision and image analysis have been used for detection of fat content in chicken and turkey (Chmiel et al, 2011a), to estimate live weight of broilers for monitoring growth (Mollah et al, 2010), and for inspection of poultry carcasses for wholesomeness (Chao et al, 2000(Chao et al, , 2007. Table 1 summarizes research studies that have been reported since 2003 on hyperspectral imaging, Vis/NIR spectroscopy, and machine vision methods for quality detection of meat and meat products.…”

An approach based on digital image analysis to estimate the live weights of pigs in farm environments

“…One of the most widely studied methods has been the body measurement approach. An animal's body measurements have been used to distinguish variations in animal sizes and shapes (Lanari et al, 2003: Salako, 2006 and also to estimate their live weights (Schofield et al, 1999;Slippers et al, 2000;Pope and Moore, 2002;Topal and Macit, 2004;Mollah et al, 2010;Tasdemir et al, 2011;Menesatti et al, 2014). Although the direct weighing method provides the most accurate result, it involves a cumbersome and time-consuming task (Brandl and Jorgensen, 1996) and could cause injury and stress to animals and stockmen when forcing the animal onto the scale.…”

“…digital images have been studied and proposed in the literature, as in the review of Frost et al (1997). Digital image-based methods have been applied to determine live weights and the growth of various animals, such as pigs (Brandl et al, 1996;Pastorelli et al, 2006;Parsons et al, 2007;Wang et al, 2008), chickens (Mollah et al, 2010) and cattle (Tasdemir, 2011;Menesatti et al, 2014). The top and side view images of animals were mostly used to extract features, such as the projected area and perimeter (Wang et al, 2008), to find the correlation of an image's features and a pig's live weight.…”