基于小波包特征提取的车牌字符识别，是一片期刊论文，还不错的，可以学习-Feature extraction based on wavelet packet license plate character recognition is a journal articles, but also good, you can learn

Feature extraction is a key issue in contentbased image retrieval (CBIR). In the past, a number of texture features have been proposed in literature, including statistic methods and spectral methods. However, most of them are not able to accu

小波模极大值用于边缘特征提取.很好的一个matlab算法，可以直接验证。-Wavelet modulus maxima for edge feature extraction algorithm matlab good one can be directly verified.

分形维数计算的毯子算法matlab代码,是学习PCA特征提取的很好的学习资料，可以提取一幅图中想要的目标。- Fractal dimension calculation algorithm matlab code blankets, Is a good learning materials to learn PCA feature extraction, Target can be extracted in a picture you want.