[图形图象] SAR滤波
matlab实现对SAR图像进行Lee、Frost、Kuan滤波，并且计算峰值信噪比、等效视数等评价指标，只需要改图像名就可以运行
MATLAB realizes Lee, frost and Kuan filtering for SAR image, and calculates the evaluation indexes such as peak signal-to-noise ratio and equivalent number of views, which can be run only by changing the image name (2021-04-09, matlab, 3KB, 下载1次)
[图形图象] 图像清晰度评价指标Matlab
图像清晰度评价函数说明
1、熵: 表示图像所包含的平均信息量的多少,嫡值越大则所含信息量越多。
文件名：entropy.m 结果：EN
2、交叉嫡：反映两幅图像的差异,交叉嫡越小,则融合图像和原图像的差别越小。
文件名：cross_entropy.m 结果：平均交叉嫡MCE，均方根交叉嫡RCE
3、峰值信噪比: PSNR越高,说明融合效果与质量越好。
文件名：psnr.m 结果：PSNR
4、Qabf: 评价边缘或梯度质量，越大边缘越明显
文件名：Qabf.m 结果：Qabf（QAB/F)
5、平均梯度（Average Gradient）:也称为清晰度，反映了图像中的微小细节反差与纹理变化特征，同时也反映了图像的清晰度，越大越好。
文件名：avg_gradient 调用：outval = avg_gradient(img)
6、结构相似性指数： SSIM指原图像和融合图像的相似程度,值越大越相似
文件名：ssim.m 结果：SSIM
7、互信息：MI(mutual information)
8、NMI: Normalized mutual information
Image sharpness evaluation function (2018-09-30, matlab, 305KB, 下载126次)
[图形图象] tuxiang
原始图像变为模糊图像，再分别使用PSF复原，较大运动长度复原，较大运动角度复原。添加噪声，分别进行滤波复原，信噪比复原，使用自相关函数复原以及使用噪声功率与一维自相关函数复原。
The original image is changed into blurred image, and then restored by PSF, the larger motion length is restored, and the larger motion angle is restored. Noise is added, filtered and restored respectively, signal to noise ratio is restored, autocorrelation function is restored, and noise power is restored with 1-D autocorrelation function. (2018-07-18, matlab, 6KB, 下载15次)
[图形图象] 1.给图片添加了正弦噪声，消除噪声
给数字信号中加入额外的适当噪声成分可以有效提高信号的信噪比
Adding additional appropriate noise components to the digital signal can effectively improve the signal to noise ratio of the signal (2017-12-21, matlab, 5KB, 下载5次)
[图形图象] ProbabAnalysisNetRadarargetDetect
在目标瑞利起伏的模型下,噪声服从零均值高斯分布时,对比了秩
K规则和最大信噪比规则这两种融合方法,对目标检测性能的影响。
Detection property ofnetted radarusing order-Kand
SNR maximization is analyzed underRayleigh fluctuations and zeromeanGaussian distribution noise. The detection probabilities of
the two rules are given underdifferent false alarm probabilitywhen six radars are deployed.
(2014-01-04, matlab, 89KB, 下载3次)
[图形图象] wavelet
对图像进行三级小波分解，利用每层分解出的系数分别对图像进行重构，计算重构出来图像的峰值信噪比，进行比较。
3 wavelet decomposition of the image, using the coefficient of each layer decomposition of the images were reconstructed to calculate the peak signal to noise ratio reconstruction out of the image, for comparison. (2009-12-26, matlab, 1KB, 下载54次)
[图形图象] Ban-denoising
本代码是基于Bandelet的硬阈值SAR图像去噪，结果与小波变换进行对比，结果表示其在峰值信噪比，边缘保持系数上均有一定的提高。压缩包中有程序和SAR图像。
This code is based on Bandelet SAR image denoising with a hard threshold .the results were compared with the wavelet transform, and the results indicated that in the peak signal to noise ratio(PSNR)and edge-preserving index(EPI), there is a certain on the increase. There are procedures and SAR images in this compression package. (2009-10-26, matlab, 264KB, 下载356次)