中文摘要：

叶是植物的重要特征信息，叶片图像提取是植物器官建模和生鲜植物识别的关键步骤。在植物自动识别和叶建模领域具有重要价值。笔者提出了一种基于主动轮廓技术和细胞神经网络的叶图像提取方法，实践表明基于细胞神经网络的可变模板技术实现了对植物叶片轮廓的灵活控制，同时结合了隐含模型和参数模型的特征，提高了提取的精度和鲁棒性。提取结果表明，采用该算法可以有效提取叶脉络。

英文摘要：

Leaf was important visual characteristic of plant. The leaf image extraction was a key step of modeling plant organs and living plant recognition, and had important value in the fields of automatic identification of plant and modeling. An efficient leaf image extraction method was proposed by combining active contours with cellular neural networks （CNN） in this paper. The active contours based on CNN provided a high flexibility and control for the contour dynamics. This approach had the advantage of applying a priori knowledge, put similar characteristics from both the implicit and parametric models, to improve the precise and robustness of image extraction. The results showed that the calculation method could be used for effectively extracting leaf vein and an ideal test results was obtained.