Modeling and Simulation of Leaf Color Based on Virtual Rice

Abstract

This paper presents a research object with the color changes of main stem leaves of two kinds of rice variety under different growth periods and nitrogen levels to improve the authenticity and practicability of visualization color model of virtual rice. The authors at first build an RGB-SPAD mathematic model of rice leaf; then obtain the leaf rendering equations via the BRDF diffuse reflection formulas; and at last apply the C++ language combined with the OpenGL graphics library programming to render and visualize appearances of the rice leaves. The leaf visualization color model constructed by this method accords with the law of rice growth, and thus it is expected to provide assistance in decision making to regulate and control the fertilizer level for rice cultivators according to the changes of leaf color.