Description: 如何在图像中加入某一固定snr的噪声？分类:matlab与图像处理
在利用matlab做一些自己算法的抗噪分析中，常常会遇到这个问题，matlab中的加噪函数是imnoise，里面的参数是噪声的均值，方差（高斯噪声）或者是感染概率（椒盐噪声），参数不能是snr值，但是很多国外的文章的噪声分析中都是用snr值来衡量加入噪声的程度的-how the image to a fixed snr noise? Categories : Matlab and image processing using Matlab to do some of his own anti-noise algorithm analysis, will often encounter this problem, which Matlab the noise function is imnoise. inside the parameters of the noise mean and variance (Gaussian noise) or the probability of infection (Impulse Noise) Parameter values can not be snr, But many foreign article noise analysis is used to measure the value snr joined the extent of noise Platform: |
Size: 2048 |
Author:顶替 |
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Description: 图像中值滤波，利用中值滤波和低通滤波进行比较，分析PSNR，得出性能差别-image filtering, using median filter and a low-pass filter, PSNR analysis, the performance differences come Platform: |
Size: 29696 |
Author:ricky |
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Description: 对图像进行二维离散小波变换, 变换级数大于等于3级, 并进行重构, 最后计算重构图像的峰值信噪比(PSNR).-images of two-dimensional discrete wavelet transform, transform Series is greater than or equal to 3, and reconstruction, Image Reconstruction final calculation of the peak signal-to-noise ratio (PSNR). Platform: |
Size: 2048 |
Author:廖鑫鹏 |
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Description: 嵌入水印后的图像与原
始图像在视觉效果上几乎一样,只在亮度上稍有不
图6 仿真实验结果
图7 仿真实验结果
同,提取出的水印图像与原图像基本一致。-embedded watermark image with the original image in the visual effects are almost identical, only slight brightness on the map six simulation results Figure 7 with the simulation results. extract the watermark image with basically the same as the original image. Platform: |
Size: 1024 |
Author:江力 |
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Description: ％ FSK-FM方案的可解调问题。
％ 高斯噪声 SNR = 2OdB 并假设镜像信号非常小。仿真设置5％- FSK-FM program can demodulation problem. Gaussian noise SNR = 2OdB and assuming the image signal is very small. Simulation set up 5 Platform: |
Size: 1024 |
Author:郑世普 |
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Description: 该原代码包提供图像去噪，图像修复，求psnr值等功能。主要使用全变分方法等方法实现图像处理。-The source code package to provide image denoising, image restoration, and features such as PSNR values. The main use of methods such as variational methods realize image processing. Platform: |
Size: 389120 |
Author:Christine |
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Description: 求图像峰值信噪比，可以用于图像质量的评估。-Peak signal to noise ratio for images that can be used for image quality assessment. Platform: |
Size: 1024 |
Author:刘坤 |
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Description: 灰度图像的jpeg压缩处理，解压处理，以及信噪比SNR的计算-Grayscale jpeg image compression, decompression, as well as the calculation of signal to noise ratio SNR Platform: |
Size: 17408 |
Author:华斌 |
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Description: 摘要:为了提高图像复原算法的性能 ,提出了一种改进的奇异值分解法估计图像的点扩散函数。从图像的退化离散模型
出发 ,对图像进行逐层分块奇异值分解 ,并自动选取奇异值重组阶数以减少噪声对估计的影响。利用理想图像奇异值向
量平均能谱指数模型 ,估计点扩散函数奇异值向量的频谱 ,再反傅里叶变换得到其时域结果。实验结果表明 ,该方法能
在不同信噪比情况下估计成像系统的点扩散函数 ,估计结果比原有估计方法有所提高 ,有望为图像复原算法的预处理提
供一种有效的手段。-Abstract : To improve the performance of image restoration algorithms , a modified Singular Value De2
[ ] [ ]
composition SVD method was proposed to estimate the Point Spread Function PSF of an imaging
system. Using the discrete image degradation model , a block2based SVD filter scheme was applied for
the image denoising with an automatically determined singular value rank. After the spectra of PSF
singular vectors were estimated under an exponential model for the averaged spectra of un2degraded
image singular vectors , the IFFT was used to get the time2domain estimation of the PSF. The experi2
mental results show that this proposed method can be applied to estimate the PSF of the imaging sys2
tem under a wide SNR range and its performance is better than the original method. It may be used as
an effective method for the image preprocessing in image restoration problems.
[ ]
Key words: image restoration Point Spread Function PSF block2based Singular Value Decomposi2 Platform: |
Size: 476160 |
Author:zy |
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Description: 求数字图像处理后的评价参数（SNR）信噪比，matlab原程序！-After the digital image processing for the evaluation parameters (SNR) signal to noise ratio, matlab original program! Platform: |
Size: 1024 |
Author:胡晓明 |
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Description: LGB图像压缩代码--使用LGB算法训练码本，多次训练直到收敛到一定程度。可以输出量化结果和量化信噪比-LGB image ya suo--the use of the code, many training until convergence to a certain extent. Output can be quantified and quantitative results SNR Platform: |
Size: 4096 |
Author:nobbe |
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Description: 这个程序时对图像进行粗略去噪处理，可以输出去噪后 图像及信噪比-This program pairs a rough denoising image processing, can output images and SNR after denoising Platform: |
Size: 1024 |
Author:llwxs |
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Description: IMAGE AREA Automatically measure the local contrast s performance and IMAGE SNR measures Signal to Noise Ratio in an image Platform: |
Size: 1024 |
Author:Adi Nugroho |
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Description: A simple function that takes an image and a mask as the input, perform compression and decompression the image (color image compression if input image is color), and display the original and reconstructed images side by side. The program should also be able to compute the SNR of the reconstructed image.-A simple function that takes an image and a mask as the input, perform compression and decompression on the image (color image compression if input image is color), and display the original and reconstructed images side by side. The program should also be able to compute the SNR of the reconstructed image. Platform: |
Size: 1024 |
Author:Tan |
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Description: matlab 高通滤波函数、低通滤波函数、信噪比函数、图像融合函数、代码简单 ，却能实现所需功能-high-pass filter function matlab, low-pass filter function, SNR function, image fusion function, the code is simple, but it can achieve the required functions Platform: |
Size: 2048 |
Author:周游 |
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Description: 可以计算图像的信噪比，适合初学者使用，采用matlab编写-Can calculate the signal to noise ratio images, suitable for beginners to use, using matlab Platform: |
Size: 1024 |
Author:Allen |
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Description: Matlab图像质量评价程序,包括无参考图像质量评价中的信息熵、信噪比等计算源码-,Matlab image quality evaluation procedures, including the source of information entropy in the reference image quality assessment, SNR calculation Platform: |
Size: 1024 |
Author:王明 |
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Search - SNR matlab image