《雷达成像技术》电子版，作者是刘永坦。本书系统地阐述了星载合成孔径雷达（SAR）和逆合成孔径雷达（ISAR）二维成像的基本理论与技术、信号处理技术、系统总体技术、系统实现及应用，为进一步研究成像雷达奠定较坚实的基础。
The electronic version of radar imaging technology is written by Liu Yongtan. This book systematically expounds the basic theory and technology of space-borne synthetic aperture radar (SAR) and inverse synthetic aperture radar (ISAR) two-dimensional imaging, signal processing technology, system technology, system implementation and application, laying a solid foundation for further research on imaging radar. (2018-10-18, matlab, 13472KB, 下载11次)
是学习PCA特征提取的很好的学习资料，包括压缩比、运行时间和计算复原图像的峰值信噪比,Gabor小波变换与PCA的人脸识别代码。
Is a good learning materials to learn PCA feature extraction, Including compression ratio, image restoration computing uptime and peak signal to noise ratio, Gabor wavelet transform and PCA face recognition code. (2016-12-16, matlab, 6KB, 下载3次)
使用灰度图像对各种去噪方法进行测试，使用半软阈值方法对图像进行去噪，均值滤波方法进行去噪(对比用)，计算灰度图像的峰值信噪比。
Use grayscale images on a variety of methods of noise attenuation test, using a semi-soft threshold method for image denoising, denoising mean filtering method (Comparative), calculate the peak signal to noise ratio grayscale images. (2016-04-04, matlab, 624KB, 下载10次)
小波变换用于图像去噪可以很好的解决物体的点奇异特性，本算法采用软硬折中阈值函数对图像进行去噪，里面包含测试图像和峰值信噪比
Wavelet transform for image denoising can solve the body good point singularity, the algorithm used for image denoising between soft and hard threshold function, which contains the test image and the peak signal to noise ratio (2014-06-15, matlab, 332KB, 下载11次)
小波变换用于图像去噪可以很好的解决物体的点奇异特性，本算法采用各种阈值函数对图像进行去噪，里面包含测试图像和峰值信噪比
Wavelet transform for image denoising can solve the body good point singularity, the algorithm used for image denoising threshold function, which contains the test image and the peak signal to noise ratio (2014-06-15, matlab, 1456KB, 下载15次)
曲线波变换用于图像去噪可以很好的解决物体沿曲线边缘的特性，本算法采用改进阈值的一种新方法对图像进行去噪，里面包含侧视图像和峰值信噪比
Curvelet transform for image denoising can solve problems well along the curve edge features, the algorithm uses a new method to improve the threshold for image denoising, which contains the side view image and peak signal to noise ratio (2014-06-15, matlab, 3224KB, 下载31次)
曲线波变换用于图像去噪可以很好的解决物体沿曲线边缘的特性，本算法采用半软阈值对图像进行去噪，里面包含侧视图像和峰值信噪比
Curvelet transform for image denoising can solve problems well along the curve edge features, the algorithm used for image denoising semi soft threshold, which comprises a side view image and peak signal to noise ratio (2014-06-15, matlab, 1612KB, 下载14次)
曲线波变换用于图像去噪可以很好的解决物体沿曲线边缘的特性，本算法采用软阈值对图像进行去噪，里面包含侧视图像和峰值信噪比
Curvelet transform for image denoising can solve problems well along the curve edge features, the algorithm used for image denoising threshold, which contains the side view image and peak signal to noise ratio (2014-06-15, matlab, 1613KB, 下载16次)
曲线波变换用于图像去噪可以很好的解决物体沿曲线边缘的特性，本算法采用硬阈值对图像进行去噪，里面包含侧视图像和峰值信噪比
Curvelet transform for image denoising can solve problems well along the curve edge features, the algorithm adopts hard thresholding for image denoising, which contains the side view image and peak signal to noise ratio (2014-06-15, matlab, 1612KB, 下载10次)
SAR图像的去噪，包含lee滤波器，frost滤波器，kuan滤波器，并且自己编写的信噪比函数
SAR image denoising, including lee filter, frost filter, kuan filter, and I have written a function of SNR (2014-04-01, matlab, 875KB, 下载144次)
通过观察图像lena_noise.bmp可以看到，该图像主要包含高斯噪声、椒盐噪声等。
通过查阅资料可知，维纳滤波可以很好的滤除高斯噪声，而中值滤波对于椒盐噪声的滤出效果优异，因此本次采用维纳+中值的滤波方式进行图像的去噪处理。
图像常用评价方法有：信噪比、相关系数、清晰度。信噪比较为常用；相关系数 由于滤波会使原图像失去某些细节，因此这种评价方式为参考性指标而非绝对评判标准；清晰度 为图像子块的方差
综合考虑采用图像的峰值信噪比(PSNR)作为评价去噪效果指标(自编PSNR.m函数).
By observing the image lena_noise.bmp can see that the image consists mainly of Gaussian noise, salt and pepper noise. Through access to information shows that the Wiener filter can be well filtered Gaussian noise, and median filter for impulse noise filter out excellent results, so this value using Wiener filtering method+ in image denoising. Image evaluation methods commonly used are: noise ratio, correlation coefficient, clarity. SNR is more commonly used correlation coefficient as filtering the original image will lose some of the details, so this evaluation method as the reference index rather than absolute criteria clarity of image sub-block variance considering the peak signal using image noise ratio (PSNR) as an evaluation index denoising (self PSNR.m function). (2013-07-09, matlab, 63KB, 下载28次)
几个关于图像质量评价的函数。包括psnr峰值信噪比，均方误差rms，正则均方误差nmse等。可用于去噪图像和压缩图像的质量评价
Several image quality evaluation of the function. Including psnr PSNR, mean square error rms, it is mean-square error nmse other. Can be used for image denoising and compression of image quality evaluation (2013-06-04, matlab, 2KB, 下载30次)
对磁共振图像数据进行费米滤波，对滤波后图像进行边缘区域和图像区域的选取，并分别对两者进行均值和标准差的计算，最后得出信噪比。
For magnetic resonance images, we can use a Fermi filter to the image for filtering. After the selection of the area of the air and the area of the image,then calculate the mean value and standard deviation value of both. Finally ,we can obtain the conclusion the new SNR value . (2013-01-18, matlab, 985KB, 下载18次)
对磁共振图像进行边缘区域和图像区域的选取，并分别对两者进行均值和标准差的计算，最后得出信噪比。
For magnetic resonance images, how can we select the area of the air and the area of the image,then calculate the mean value and standard deviation value of both. Finally ,we can obtain the conclusion the signal-to-noise ratio. (2013-01-18, matlab, 985KB, 下载11次)
基于DCT域音频水印完整源代码，包括水印图像的预处理（二维二值图像Arnold变换、混沌加密、降维），水印的嵌入提取以及检测，信噪比和相似性系数。
Based on the the DCT domain audio watermarking complete source code, including the watermark image preprocessing (two-dimensional binary images Arnold transform chaotic encryption, dimensionality reduction), the embedded watermark extraction and detection, signal-to-noise ratio and similarity coefficient. (2013-01-06, matlab, 21211KB, 下载202次)
数字音频水印中，原始载体音频和含水印音频之间的峰值信噪比PSNR和原始水印与提取出来的水印之间的归一化相关系数NC
Digital audio watermarking normalized correlation coefficient between PSNR PSNR between the original carrier audio and watermarked audio and the original watermark and extracted watermark, NC (2013-01-05, matlab, 1KB, 下载45次)
本源代码是自己编写的关于图像小目标的检测（matlab版），其中包括对不同对比度、信噪比下的图像小目标进行检测。
The source code is written about the image of his small target detection (matlab edition), including the different contrast, signal-to-noise ratio of image detect small targets. (2012-02-17, matlab, 8KB, 下载68次)
3 图像基本处理操作（图像显示、读写、像素统计处理、图像文件I/O等）
4 图像质量的客观评价（峰值信噪比PSNR及其应用）
5 图像的代数运算（绝对值差函数imabsdiff，叠加函数imadd，图像的旋转imrotate）
6 视频处理（创建AVI视频）
7 图像增强（直方图、直方图均化、均值滤波、中值滤波）
8 图像形态学分析（膨胀、腐蚀、开、闭运算、轮廓提取）
3 basic image processing operations (image display, read and write, pixel statistics processing, image file I/O, etc.) 4 objective evaluation of image quality (PSNR peak signal to noise ratio and its application) 5 images of algebraic operations (sum of absolute differences function imabsdiff , superimposed function imadd, image rotation imrotate) 6 video processing (creating AVI video) 7 image enhancement (histogram, histogram equalization, mean filtering, median filtering) 8 image morphology analysis (expansion, erosion, opening and closing operations, contour extraction) (2011-11-10, matlab, 4KB, 下载52次)
图像消噪是图像预处理的主要任务之一，其作用是为了提高图像的信噪比，突出图像的期望特征。本函数利用小波变换消除噪声，具有较好的实验结果。
Image denoising is one of the main tasks of image pre-processing, its role is to enhance the image signal to noise ratio, highlighting the expectations of the image features. This function is the use of wavelet transform to eliminate the noise, with good results. (2010-01-24, matlab, 11KB, 下载13次)
整个数字水印的程序。包括峰值信躁比的计算，各种攻击后的水印提取等等。
entire digital watermarking process. Including peak impatient than the letter, after the attacks watermark extraction, and so on. (2007-04-14, matlab, 4KB, 下载252次)