chirp-signal

本书详细讲解了数字音频水印的嵌入及提取的算法，并对信息隐藏等都有解释。(The book detailed account of digital audio watermark embedding and extraction algorithms, such as information hiding and have to explain.)

如下亮度变换功能的函数：负片变换、对数变换、gamma变换、和对比度拉伸变换。(Brightness as a function of conversion functions: negative transformation, logarithmic transformation, gamma conversion, and contrast stretching transformation.)

采用熵值法求特征分量的权重，一般可用于特征选择与特征提取(Entroy algorithm ia used to be calculate the weight of each element,and is helpful in the selection and extraction of features)

一般周期调制信号下的模拟ppm信号matlab仿真(general cycle modulation signal simulation ppm Matlab Signal Simulation)

附加包含蓝牙调频系统的simulink模型，包含信号传输，接收，谱分析，误码分析等。(The additional Bluetooth FM system simulink model that contains the signal transmission, reception, spectral analysis, error analysis.)

GUI系统进行图像的类型转换，能够吧图像转换成不同的格式。(GUI system for image conversion, it can convert images into a different format.)

频率响应屏蔽技术（FRM，Frequency Response Masking）技术实现窄带滤波器(Frequency Response Masking technology to realize narrow band filter)

在ar人脸库上使用鉴别公共向量方法（discriminant common vector）方法实现人脸图像鉴别分析(In the ar face database using the identification of public-vector method (discriminant common vector) method of achieving facial image discriminant analysis)

主要是文章的算法验证。 Yaojili——验证算法，转换方程 Y_all——计算转换7参数 Y_angel——生成500组数据，验证算法 姚吉利——3维坐标转换参数直接计算的严密公式——文中标注为勘误。

..Barcode analysis based on webcam.. this program is an example how to extracting features of the barcode and analyze them,,, for example we can use webcam to get the barcode image.