instfreq

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)

对深度图像进行滤波、渲染和着色，更加可视化(depth image visualition and filtering for coming 3D reconstruction)

能量检测法是一种比较简单的信号检测方法[1]， 属于信号的非相干的检测， 直接对时域信号采样值求模，然后平方即可得到；或利用FFT转换到频域，然后对频域信号求模平方也可得到。它无需知道检测信号的任何先验知识，对信号类型也不作限制。 实际上，能量检测是在一定频带范围内作能量积累，如果积累的能量高于一 定的门限，则说明信号的存在；如果低于一定的门限，则说明仅有噪声。能量检 测的出发点是信号加噪声的能量大于噪声的能量。能量检测方法对信号没有作任何假设，是一种盲检算法。 此代码“利用FFT转换到频域，然后对频域信号求模平方”方法来实现对用户的检测。(In fact, energy detection is used for energy accumulation in a certain frequency range. If the accumulated energy is higher than a certain threshold, the existence of the signal is indicated. If the threshold is lower than the threshold, then only noise is indicated. The starting point of energy detection is that the energy of signal plus noise is greater than that of noise. The energy detection method does not make any assumptions about the signal, and it is a blind detection algorithm. This code "converts the frequency domain into the frequency domain by FFT, then calculates the square of the square of the frequency domain signal" to realize the detection of the user.)

本代码是做指纹识别是代码，平台是MATLAB，能够完成指纹识别、处理、匹配整个过程。(This code is to do fingerprint identification code, the platform is MATLAB, able to complete the fingerprint identification, processing, matching the whole process.)

说明：  基于LSB的数字水印算法及MATLAB实现 黄仿元 基于LSB的数字水印算法及MATLAB实现_黄仿元(Lsb-based digital watermarking algorithm and MATLAB implementation _ yellow imitation element)

文章介绍了一种基于拉普拉斯——高斯模型的语音端点检测算法！(This paper introduces a Laplace-based- voice endpoint detection algorithm Gaussian model!)

主要用于图像处理，局部二值模式，人脸识别方面(Mainly used for image processing, local binary patterns, face recognition area)

基于灰度共生矩阵的纹理特征提取，输出为图像四个方向共十六个特征值(Gray-level co-occurrence matrix based texture feature extraction, the output image in four directions for a total of 16 eigenvalues)

自己写的一个图像裁减功能的代码，但必须首先设置好的裁减区域矩形框的坐标。(himself wrote an image of the reduction of the functional code, but must first set a good reduction of regional rectangular box coordinates.)

说明：  图像配准，利用互信息进行图像配准，主要针对旋转和平移(Image registration using mutual information for image registration, the main response to rotation and translation)