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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
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Size: 2048 |
Author: 顶替 |
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Description: 求图像峰值信噪比PSNR的代码matlab版-PSNR PSNR for the image code matlab version
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Size: 3072 |
Author: 远志 |
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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.
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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.
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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
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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
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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!
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Size: 1024 |
Author: 胡晓明 |
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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
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Size: 1024 |
Author: llwxs |
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Description: 这个程序可以实现两幅图像信噪比的计算，尤其是对于图像压缩，可以评判压缩的质量-This process can be achieved two SNR calculation, especially for image compression, you can judge the quality of compressed
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Size: 1024 |
Author: 范范 |
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Description: 该文件包括一些内容，可配套图像处理使用
YUVviewerPlus.exe
对YUVviewer进行了修改，增加一下内容：
1、增加支持的格式：yuv4:4:4, yuv4:2:2, gbmp
2、增加zoom的范围
BMP2GBMP.exe
将一副副的BMP图片合并成一个没有BMP头信息的文件
note:仅支持24位bmp图片
DYUV2SEQ.exe
实现分离的yuv文件转换成YUV序列 4：2：0
ShowDIB.exe
BMP图片显示程序，多文档框架
YUV2BMP.exe
实现了YUV转换成24位的BMP图片，实现了批量转换
BMP2SEQ.exe
将一系列24位或8位的BMP图片转换成4：2：0的YUV序列。
DYUV2BMP.exe
将分离的Y，U，V转换成24位的BMP图片，实现了批量转换
GBMP2SEQ.exe
实现包含一组rgb24图片（不含文件头）的单一文件到yuv4:2:0序列文件的转换
SEQ2BMP.exe
实现了SEQ2BMP的程序
输出BMP文件为24位真彩
SeqCut.exe
实现对YUV4:2:0文件的剪切操作
即从序列文件中取出一段序列
SeqSnr.exe
实现了两序列对应帧之间Y分量的SNR求取，并给出平均值-This is a executable file, can BMP image or sequence of conversion into GBMP format, can be used for image processing and analysis package
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Size: 317440 |
Author: 王瑾 |
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Description: 该文件包括一些内容，可配套图像处理使用
YUVviewerPlus.exe
对YUVviewer进行了修改，增加一下内容：
1、增加支持的格式：yuv4:4:4, yuv4:2:2, gbmp
2、增加zoom的范围
BMP2GBMP.exe
将一副副的BMP图片合并成一个没有BMP头信息的文件
note:仅支持24位bmp图片
DYUV2SEQ.exe
实现分离的yuv文件转换成YUV序列 4：2：0
ShowDIB.exe
BMP图片显示程序，多文档框架
YUV2BMP.exe
实现了YUV转换成24位的BMP图片，实现了批量转换
BMP2SEQ.exe
将一系列24位或8位的BMP图片转换成4：2：0的YUV序列。
DYUV2BMP.exe
将分离的Y，U，V转换成24位的BMP图片，实现了批量转换
GBMP2SEQ.exe
实现包含一组rgb24图片（不含文件头）的单一文件到yuv4:2:0序列文件的转换
SEQ2BMP.exe
实现了SEQ2BMP的程序
输出BMP文件为24位真彩
SeqCut.exe
实现对YUV4:2:0文件的剪切操作
即从序列文件中取出一段序列
SeqSnr.exe
实现了两序列对应帧之间Y分量的SNR求取，并给出平均值-This is a executable file, can BMP image or sequence of conversion into GBMP format, can be used for image processing and analysis package
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Size: 317440 |
Author: 王瑾 |
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Description: 图像的SNR，PSNR以及MSE的计算源代码-The image SNR, PSNR and the source code for the calculation of MSE
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Size: 51200 |
Author: jlevylee |
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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
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Size: 1024 |
Author: Allen |
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Description: 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.
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Size: 1008640 |
Author: lisha |
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Description: 指滤波器的性能与信号的特性取得某种一致，使滤波器输出端的信号瞬时功率与噪声平均功率的比值最大.即当信号与噪声同时进入滤波器时，它使信号成分在某一瞬间出现尖峰值，而噪声成分受到抑制。-In signal processing, a matched filter (originally known as a North filter[1]) is obtained by correlating a known signal, or template, with an unknown signal to detect the presence of the template in the unknown signal. This is equivalent to convolving the unknown signal with a conjugated time-reversed version of the template. The matched filter is the optimal linear filter for maximizing the signal to noise ratio (SNR) in the presence of additive stochastic noise. Matched filters are commonly used in radar, in which a known signal is sent out, and the reflected signal is examined for common elements of the out-going signal. Pulse compression is an example of matched filtering. It is so called because impulse response is matched to input pulse signals. Two-dimensional matched filters are commonly used in image processing, e.g., to improve SNR for X-ray.
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Size: 1024 |
Author: 何兴宇 |
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Description: 为实现无人战斗机精确制导实际需求，根据作战的实时性和精确性特点，提出了一种基于图像匹配
技术的制导方案。该制导方案引入地标信息，研究匹配方法，分析匹配计算量，提出了基于高速数字信号处理芯
片来实现匹配制导的方法。软件仿真结果表明，匹配单元的结构完全能够满足制导系统功能实现的需要。-t:T or ealizeth ep reciseg uidanceo fun manneda irv ehicle,in t ermso fre al-timep ropertya ndp
scheme of guidance system based on image matching technology for unmanned air vehichle is designed. The
recision, a
landmarking
information is employed in the scheme. The matching methods are studied,
ThAn。。,mn1Pmantatinn matlind hacad nn high-,need digital signal ornrp snr is
and the computation load is analyzed.
proposed. The simulation result shows
that the structure of image matching unit can satisfy the need of the guidance system.
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Size: 312320 |
Author: maogh |
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Description: 从先验概率中采样，计算权重，matlab小波分析程序，模式识别中的bayes判别分析算法，用于图像处理的独立分量分析，利用自然梯度算法，使用混沌与分形分析的例程，最大信噪比的独立分量分析算法，使用高阶累积量对MPSK信号进行调制识别。- Sampling a priori probability, calculate the weight, matlab wavelet analysis program, Pattern Recognition bayes discriminant analysis algorithm, Independent component analysis for image processing, Use of natural gradient algorithm, Use Chaos and fractal analysis routines, SNR largest independent component analysis algorithm, Using high-order cumulants of MPSK signal modulation recognition.
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Size: 4096 |
Author: nksqtmbph |
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Description: 对HARQ系统的吞吐量分析，在matlab R2009b调试通过，最大信噪比的独立分量分析算法，考虑雨衰 阴影 和多径影响，包含光伏电池模块、MPPT模块、BOOST模块、逆变模块，采用热核构造权重，用于图像处理的独立分量分析。-HARQ throughput analysis of the system, In matlab R2009b debugging through, SNR largest independent component analysis algorithm, Consider shadow rain attenuation and multipath effects PV modules contain, MPPT module, BOOST module, inverter module, Thermonuclear using weighting factors Independent component analysis for image processing.
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Size: 8192 |
Author: vhxzjbwws |
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Description: 用于图像处理的独立分量分析，包括脚本文件和函数文件形式，最小二乘回归分析算法，基于人工神经网络的常用数字信号调制，连续相位调制信号(CPM)产生，三相光伏逆变并网的仿真，最大信噪比的独立分量分析算法。- Independent component analysis for image processing, Including script files and function files in the form, Least-squares regression analysis algorithm, The commonly used digital signal modulation based on artificial neural network, Continuous phase modulation signal (CPM) to produce, Three-phase photovoltaic inverter and network simulation, SNR largest independent component analysis algorithm.
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Size: 8192 |
Author: pfdmdbhrn |
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Description:
快速处理图像文件 高效实用软件工具
Efficient and practical software tool for fast image file processing
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Size: 605184 |
Author: 续 |
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