Three-Dimensional Reconstruction and Phenotype Nondestructive Measurement Technology for Rape Roots

In recent years, 3D reconstruction technology has developed rapidly. It is a promising field to apply 3D reconstruction technology to the measurement of plant configuration parameters. The main content of this paper is the 3D reconstruction technology for rape roots and the measurement methods for their key traits. Firstly, we set up a set of low-cost image sequence acquisition device of rape roots. We collected image data with common consumption level camera and used the method of SfM to carry out 3D reconstruction of rape roots. Then we proposed a series of algorithms to measure the surface area, volume, number of primary lateral roots and length of taproot based on the huge point cloud data obtained from 3D reconstruction. Finally, we designed a set of nondestructive measurement system for key traits of rape roots. The total volume of root, the number of primary lateral roots and the length of taproot were measured manually. Compared with the results of manual measurement, the accuracy of the main algorithm proposed in this paper is not less than 95%. Our contribution is to provide a 3D reconstruction method that is easy to operate, and to provide a high-precision measurement method for the key traits of rape roots, which has an important value for quantitative analysis of rape roots phenotype.