关键词: 双树复小波变换, Gabor小波, 特征提取, 灰度共生矩阵, Libsvm

Abstract: In order to improve the recognition accuracy among the kinds of aphids，the recognition method among kinds of aphids based on Dual-Tree Complex Wavelet Transform（DT-CWT） and Support Vector Machine（Libsvm） is proposed.Firstly the image is pretreated；secondly the features of the aphids’ image examples about three kinds of crops are extracted by DT-CWT in order to get the training parameters of training model；finally the training model can recognize aphids among the three kinds of crops.By contrasting to Gabor wavelet transform and the traditional extracting texture’s methods based on Gray-Level Co-Occurrence Matrix，the experiment result shows that the method has a certain practicality and feasibility and provides basic for aphids’ recognition between the same kinds of aphids.

Key words: Dual-Tree Complex Wavelet Transform（DT-CWT）, Gabor wavelet, feature extraction, gray-scale co-occurrence matrix, Libsvm