A skeleton extraction method of plant root branching characteristics

Abstract

The invention discloses a method for extracting a skeleton of a branching feature of a plant root system, comprising the following steps: (1) acquiring an image: acquiring a CT sequence diagram of a cross-sectional tomographic sequence of a plant root system; (2) positioning the CT sequence diagram of a branched root segment : Using the remaining convex hull area detection technology, the CT contour of the root system is divided into the contour with branch and the contour without branch; (3) Region separation: the concave point detection and segmentation method is used to separate the contour with branch; ( 4) Main root bifurcation CT sequence map positioning: select the appropriate opening operation and roundness threshold to locate the main root bifurcation CT sequence map; (5) Skeleton extraction: use the CT contour centroid point at the beginning of the main root bifurcation, and not Three-dimensional curve interpolation fitting is carried out on the grain points of the CT sequence diagram of the sub-root segment containing branches, and a root system skeleton with better effect is obtained. The invention can automatically identify the bifurcation characteristics according to the CT sequence diagram of the root system, and perform interpolation fitting after region separation and positioning of the main root bifurcation characteristic section, greatly simplifying the operation.

Description

technical field

[0001] The invention relates to the interdisciplinary technical field combining non-destructive testing and scientific computing visualization, and more specifically, relates to a rapid extraction technology of a three-dimensional body model skeleton based on the characteristics of CT sequence diagrams of plant root branching. Background technique

[0002] The root system is an important organ of plants growing in the soil. In order to realize in-situ non-destructive detection of roots in the soil medium, X-ray-based tomographic imaging technology can be used, and the three-dimensional root system surface or volume can be obtained through computer three-dimensional reconstruction technology. model for further 3D skeleton extraction.

[0003] Skeleton model: It is called the fourth multimedia data type after sound, image and video. It is used for the description, retrieval, matching, marking, tracking, identification, compression, measurement of phenotypic pa...

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