关键词: 反向识别法, 食叶害虫, 图像处理, BP神经网络

Abstract: To achieve the computer recognition of vegetable leafeating pests and the scientific evaluation of pest level's, the paper proposed a reverse identification method through the eaten leaves to determine the pests. After image preprocessing of the eaten leaves by pests, seven spherical shape feature values of eaten leaves could be automatically extracted: roundness degree, complexity degree, and spherical degree, etc., and then the BP neural network model for recognition could be built up. The results show that the method is good at recognizing the pest species by the geometric feature of eaten leaves by pests, and give a scientific evaluation for the leaf's harm degree.

Key words: The Reverse Identification Method, Leaf-eating Pest, Image Process, BP Neural Network