In this method, the original image 's feature is extracted by using wavelet transform and quantization. The feature information is changed into watermark by the chaotic sequence encryption.
该方法在一定的量化标准下利用小渡变换提取图象的特征信息，通过混沌序列对其加密生成数字水印。
Since the corresponding pair of feature points was difficult to be extracted in feature points registration methods, an image mosaic method based on interest point matching was presented.
针对基于图像特征点的配准方法中对应特征对难以准确提取的问题，提出一种基于兴趣点匹配的图像自动拼接方法。
Usually image recognition based on neural networks needs feature extraction, and then the features extracted are delivered to the neural network classifier.
神经网络用于图像识别一般都要提取图像特征，然后把提取好的图像特征送入神经网络识别器进行识别。
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