Visual Modeling of Rice Root Growth Based on B-Spline Curve

Abstract

As a major food production crop in China, the growth and development of rice is an extremely complex systemic process, and the root system is the main organ for rice to obtain nutrients. Therefore, 3D modeling and visualization of the rice root system can help to further understand its morphology, structure and function, and provide an aid for scientific cultivation of rice and improving rice yield for decision making. In this paper, a mathematical model of the rice root system is established based on the B spline curve combined with the L-system approach, using mathematical knowledge based on the 3D morphological characteristics of the real rice root system. The B-Spline Curve is chosen to simulate this, and the recursive definition of B-Spline Curve and its formula are used to realize the modeling of the rice root system curve. Based on the mathematical method of rice root system integration, the bending effect of rice root system at different periods and different growth positions is realized. Finally, the L-system combined with B-Spline Curve is used to construct a rice root system model and realize the rice root system visualization simulation. The simulated image is closer to the real rice root system image in terms of morphological structure and has a strong sense of realism.

Design of nonlinear control system for motion trajectory of industrial handling robot

“…Yang et al applied the B‐sample interpolation curve method to the model construction of rice root system for the visualization of paddy rice radication descending axis. Experiments showed that the simulated images were closer to the real paddy rice radication descending axis images in terms of morphological structure under B spline interpolation curve modeling 17 . Shi et al proposed a friction electric nanogenerator (TENG) and friction voltaic nanogenerator (TVNG) integrated in a cylinder as dual function pneumatic sensors for monitoring position and speed.…”

“…Experiments showed that the simulated images were closer to the real paddy rice radication descending axis images in terms of morphological structure under B spline interpolation curve modeling. 17 Shi et al proposed a friction electric nanogenerator (TENG) and friction voltaic nanogenerator (TVNG) integrated in a cylinder as dual function pneumatic sensors for monitoring position and speed. The experiment shows that the sensor achieves pneumatic monitoring and high-precision servo control of the rotating cylinder within a range of 2% overshoot and 1.5% control error.…”

“…31,32 The size of the flock is set as M, the position vector of the individual particles in the search space is denoted as X i , the speed vector is denoted as V i , the historical best position of the individual is denoted as P i , and the best position of the flock is denoted as P g . Thus, the process of iterative update of the best position is expressed as Equation (17).…”

“…In Equation (17), t indicates the number of iterations and d indicates the move step of the individual particle. f denotes the fitness value of an individual.…”

Automatically Extracting Rubber Tree Stem Shape from Point Cloud Data Acquisition Using a B-Spline Fitting Program

“…Li et al [34] realized the parametric modeling of bowl-shaped, peduncle-shaped, and lumpy tree knots, and their results had a certain significance for evaluating wood quality and improving the realism of the surface textures of knot models. Yang et al [35] set up a root model of rice combined with an L-system to study more about the form, structure, and function of rice. A new integration method was used to obtain the angles between roots to realize a visual simulation of rice root systems.…”