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首页> 外文期刊>Journal of dairy research >Assessing the potential of photogrammetry to monitor feed intake of dairy cows
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Assessing the potential of photogrammetry to monitor feed intake of dairy cows

机译：评估摄影测量的潜力，以监测奶牛的饲料摄入量

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摘要

We address the hypothesis that individual cow feed intake can be measured in commercial farms through the use of a photogrammetry method. Feed intake and feed efficiency have a significant economic value for the farmer. A common method for measuring feed mass in research is a feed mass weighing system, which is excessively expensive for commercial farms. However, feed mass can be estimated by its volume, which can be measured by photogrammetry. Photogrammetry applies cameras along the feed-lane, photographing the feed before and after the cow visits the feed-lane, and calculating the feed volume. In this study, the precision of estimating feed mass by its volume was tested by comparing measured mass and calculated volume of feed heaps. The following principal factors had an impact on the precision of this method: camera quality, lighting conditions, image resolution, number of images, and feed density. Under laboratory conditions, the feed mass estimation error was 0 center dot 483 kg for heaps up to 7 kg, while in the cowshed the estimation error was 1 center dot 32 kg for up to 40 kg. A complementary experiment showed that the natural feed compressibility causes about 85% of uncertainty in the mass estimation error.
机译：我们解决了通过使用摄影测量方法在商业农场中测量单个牛进料摄入的假设。饲料摄入和饲料效率对农民具有重要的经济价值。用于测量研究中的饲料质量的常用方法是一种饲料质量称重系统，对于商业农场过于昂贵。然而，饲料质量可以通过其体积估计，其可以通过摄影测量测量。摄影测量通常将相机沿馈线应用，母牛前后拍摄饲料，然后计算进料车道，并计算进料量。在该研究中，通过比较测量的质量和计算的饲料体积来测试通过其体积估计饲料质量的精度。以下主要因素对该方法的精度产生了影响：相机质量，照明条件，图像分辨率，图像数量和馈电。在实验室条件下，饲料质量估计误差为0中心点483千克，堆高达7千克，而在牛仔中，估计误差为1中心点32kg，可达40kg。互补实验表明，自然饲料压缩性导致质量估计误差中的约85％的不确定性。

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