RGB (red, green, and blue) is an important index for color expression, and has been widely applied in agricultural production for recognizing crops and weeds, analyzing crop seed color, and diagnosing crop nutrition status.
Meanwhile, RGB values of crop leaf color were initially simulated with leaf SPAD value, which was useful for the dynamic color rendering of virtual crop. However, most of the previous studies on virtual crop paid much attention to the morphological modeling of crop leaf, and neglected the simulation of leaf color.