Abstract: To deform crop organs，the method of object deforming driven by skeleton is applied to crop organ，and then a skeleton driven method for deforming leaf is proposed.Firstly，the leaf skeleton is generated.Secondly，the leaf skeleton is deformed，and the leaf mesh is mapped to the deformed leaf skeleton.Thus the deformation of the leaf mesh follows the deformation of the leaf skeleton.Finally，the proposed techniques are applied to simulate wheat leaf deformation including curling and twisting.The results on leaves deformation demonstrate that the proposed approach is applicable for simulating deformation of cereal leaves with realistic effects.

Key words: realistic rendering, skeleton driven, organ deformation, crop leaf

摘要： 针对作物器官的变形问题，将骨架驱动物体变形的方法应用于作物器官的局部变形，提出了一种骨架驱动的叶片变形方法：生成叶片骨架模型，驱动骨架模型发生变形，并根据变形后的叶片骨架将变形操作应用到叶片曲面上，进而实现叶片曲面变形。应用该方法，分别对小麦叶片曲面进行弯曲和扭曲变形模拟。实验结果表明，基于骨架驱动的作物叶片形变方法能灵活控制叶片弯曲和扭曲程度，从而获得自然的叶片曲面变形效果。

关键词: 真实感绘制, 骨架驱动, 器官变形, 作物叶片