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Fast image acquisition systems and motion estimation methods for application in fertilizer spreading control

机译:用于肥料撒播控制的快速图像采集系统和运动估计方法

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Despite their mechanical simplicity, the centrifugal spreaders used for mineral fertilization give rise to highly complex physical phenomena that have never been fully characterized. Yet precise understanding of centrifugal spreading action (especially initial pellet conditions) is important for ensuring accurate fertilization conditions. This paper outlines design of a fast image acquisition system for characterizing centrifugal spreading action in the laboratory. This patented multiple-exposure system determines pellet trajectories after ejection using a high-resolution digital camera coupled to a battery of flashlights. Various motion estimation methods are used. The Markov random field method [1-3] gives accurate results, superior to those obtained by intercorrelation or the theoretical fertilizer stream modelling method. These results can then be used in a ballistic flight model to forecast distribution of fertilizer on the soil. A fourth motion estimation method, based on Gabor filters [4, 5] is currently under investigation.
机译:尽管它们的机械简单性,但用于矿物肥料的离心撒布机却引起了高度复杂的物理现象,而这种现象从未得到充分表征。然而,对离心散布作用(特别是初始颗粒条件)的准确理解对于确保精确的施肥条件很重要。本文概述了用于表征实验室离心扩散作用的快速图像采集系统的设计。这个获得专利的多重曝光系统使用耦合到手电筒的高分辨率数码相机确定弹射后的弹丸轨迹。使用各种运动估计方法。马尔可夫随机场方法[1-3]给出的结果准确,优于通过互相关或理论肥料流建模方法获得的结果。然后可以将这些结果用于弹道飞行模型中,以预测肥料在土壤中的分布。目前正在研究基于Gabor滤波器[4,5]的第四种运动估计方法。

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