An automatic measurement method based on three-dimensional point cloud livestock phenotype body size data

Abstract

The invention discloses an automatic livestock phenotypic body size data measuring method based on three-dimensional point cloud, and the method comprises the following steps: obtaining different local point clouds of livestock, and fusing a plurality of local point clouds into a global point cloud; fitting a central axis plane for the point cloud above the livestock to obtain a ridge contour lineof the livestock, positioning a body length starting point and a body length ending point of the livestock on the ridge contour line, and performing integration to obtain the body surface length of the livestock; acquiring ground plane point cloud data according to the ridge contour line of the livestock, performing least square fitting on the plane to obtain a ground plane equation, and solvingthe body height of the livestock; projecting the upper point cloud of the livestock to an XOY plane to obtain a discrete curve graph of point cloud number distribution, finding out the position of thechest width in the discrete curve graph, and further solving the chest width length of the livestock; selecting a slice of a to-be-measured girth, establishing a polar coordinate system by adopting the slice, drawing the polar coordinate system on a rectangular coordinate system, fitting a curve, and solving the to-be-measured girth by utilizing a polar coordinate arc length integral formula.

Description

technical field [0001] The invention relates to the technical field of livestock body shape measurement, and more specifically, relates to an automatic measurement method based on three-dimensional point cloud livestock phenotype body size data. Background technique [0002] In pig breeding and pig breeding, in order to improve the genetic performance of breeding pigs and effectively manage a large number of individual pigs, it is necessary to establish a method for assessing individual body size and body condition of pigs. The purpose of body shape and body condition assessment is to collect phenotypes of body shape and appearance traits such as body length, body height, chest girth, abdominal girth, and hip girth of livestock. [0003] The traditional method is to measure directly with a tape measure, but there are problems such as driving stress to livestock, poor accuracy of manual measurement, low measurement efficiency, and difficulty in measuring complex traits. For ...

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Problems solved by technology

[0005] In order to solve the problems of poor accuracy, low measurement efficiency, and difficult measurement of complex traits in the traditional manual measurement, the present invention provides an automatic measurement method based on three-dimensional point cloud livestock phenotype and body size data, which can automatically measure the livestock's expression The body scale can be used to measure, and it can improve the measurement efficiency and measurement accuracy

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