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一种基于小波的图像分块处理并且水印嵌入和提取，适合初学者学习使用(Based on wavelet image processing block and the watermark embedding and extraction, suitable for beginners learning to use)

说明：  编程实现灰度图像的频域滤波算法。使用Matlab实现不延拓和延拓两个版本。对于延拓和不延拓版本，在理想低通滤波器、巴特沃斯低通滤波器和高斯低通滤波器上比较两者的区别；对于延拓版本，比较不同参数设置对上述三种滤波器滤波结果的影响。(Program to realize the filtering algorithm of gray image in frequency domain. Matlab is used to realize two versions of no extension and extension. For the extension version and the non extension version, the differences between the ideal low-pass filter, Butterworth low-pass filter and Gauss low-pass filter are compared; for the extension version, the effects of different parameter settings on the above three filter results are compared.)

matlab的GUI设计教程，希望对利用matlab设计GUI的用户带来一定的帮助(Matlab GUI design tutorial, I hope the use of MATLAB design GUI users to bring some help)

说明：  usps数据库为标准手写数据库，此为mat数据文件，含训练集和测试(USPS database is a standard handwritten database, which is a mat data file, including training set and test)

可以计算图像结构相似性，评价图像质量(Similarity of image structure can be calculated and image quality can be evaluated)

mode purity method simulation

提取并显示鼠标所在图像点的颜色，C++精选学习源码，很好的参考资料。(To extract and display the image color, select learning C++ source code, a good reference.)

标注节点距离，批量标注节点距离。节省画图时间 提高画图效率(Marking Node Distance)

序列匹配c++实现，可以帮助理解序列匹配算法(Sequence matching c++ implementation can help to understand the sequence matching algorithm)

基于彩色图像实现的DCT变换域图像数字水印算法。(Color images based on the realization of the DCT transform domain image watermarking algorithm.)