基于相对叶绿素含量的黄瓜叶色仿真

提出了一种基于相对叶绿素含量的植物叶片颜色仿真方法,通过连续对正常生长状态下的黄瓜叶片图像采集及相对叶绿素含量SPAD值测定,建立了黄瓜叶片颜色分量与SPAD值的数学关系模型,并采用均方根误差(RMSE)对模型进行验证,结果显示叶片的3个颜色分量R、G、B的实测值与模拟值之间的RMSE为13.43%、8.47%、7.42%,模拟效果较好。通过结合叶片色素浓度分布图对叶色空间分布进行仿真,并采用高级着色器语言实现了黄瓜叶片表观颜色变化过程的可视化模拟,获得了较好的真实感效果。

Visual Simulation of Cucumber Leaf Color Based on the Relative Content of Chlorophyll

A method for visual simulating leaf color based on the relative content of chlorophyll was proposed. The mathematical model between cucumber leaf color components and chlorophyll relative content was established according to images acquisited from real field and measuring chlorophyll relative content (SPAD) of the cucumber leaf in normal growth state continuously, and the model was also verified by using root-mean-square error (RMSE). The results showed that the RMSE between the observed values (R, G, B) and simulated vales(R, G, B) in leaf are 13.43%, 8.47%, 7.42% respectively. The rendering for the spatial distribution of apparent color of cucumber leaf was realized by combining with a black and white pigment distribution texture which was a grayscale image before being preprocessed. Then the high level shader language (OpenGL 2.0 Shader Language) was used to realize the rendering of apparent color changing process of cucumber leaf. The above process showed that the method proposed can achieve better realistic rendering results.