Description: Image Compression
A collection of simple routines for image compression using different techniques.
BTCODE:
Image compression Using Block Truncation Coding.
PYRAMID:
Image compression based on Gaussian Pyramids.
DCTCOMPR:
Image compression based on Discrete Cosine Transform.
IMCOMPR:
Image compression based on Singular Value Decomposition.
The given codes can be also used in 2D noise suppression.
Platform: |
Size: 10066 |
Author:林明 |
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Description: 程序代码说明
P0301：数字图像矩阵数据的显示及其傅立叶变换
P0302：二维离散余弦变换的图像压缩
P0303：采用灰度变换的方法增强图像的对比度
P0304：直方图均匀化
P0305：模拟图像受高斯白噪声和椒盐噪声的影响
P0306：采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
P0307：采用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
P0308：图像的自适应魏纳滤波
P0309：运用5种不同的梯度增强法进行图像锐化
P0310：图像的高通滤波和掩模处理
P0311：利用巴特沃斯（Butterworth）低通滤波器对受噪声干扰的图像进行平滑处理
P0312：利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处理
-code P0301 : Digital image data matrix display and Fourier Transform P0302 : Two-dimensional discrete cosine transform image compression P0303 : Gray used a new method to enhance the contrast of the image P0304 : histogram equalization P0305 : Simulation images by white Gaussian noise and Impulse noise impact P0306 : 2D median filtering function medfilt2 right by the Salt and Pepper image noise filtering P0307 : MATLAB filter2 the function of noise interference by the image filtering P0308 : Image Adaptive Filter Weiner P0309 : use five different gradient Enhancement Act for image sharpening P0310 : Images of the high-pass filtering and mask handling P0311 : use Butterworth (Butterworth) low-pass filter to noise interference by the image smoothing P 0312 : Butterworth (Butterworth) high-pa Platform: |
Size: 11264 |
Author:Jimmy Yen |
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Description: 程序代码说明
P0301：数字图像矩阵数据的显示及其傅立叶变换
P0302：二维离散余弦变换的图像压缩
P0303：采用灰度变换的方法增强图像的对比度
P0304：直方图均匀化
P0305：模拟图像受高斯白噪声和椒盐噪声的影响
P0306：采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
P0307：采用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
P0308：图像的自适应魏纳滤波
P0309：运用5种不同的梯度增强法进行图像锐化
P0310：图像的高通滤波和掩模处理
P0311：利用巴特沃斯（Butterworth）低通滤波器对受噪声干扰的图像进行平滑处理
P0312：利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处理-code P0301 : Digital image data matrix display and Fourier Transform P0302 : Two-dimensional discrete cosine transform image compression P0303 : Gray used a new method to enhance the contrast of the image P0304 : histogram equalization P0305 : Simulation images by white Gaussian noise and Impulse noise impact P0306 : 2D median filtering function medfilt2 right by the Salt and Pepper image noise filtering P0307 : MATLAB filter2 the function of noise interference by the image filtering P0308 : Image Adaptive Filter Weiner P0309 : use five different gradient Enhancement Act for image sharpening P0310 : Images of the high-pass filtering and mask handling P0311 : use Butterworth (Butterworth) low-pass filter to noise interference by the image smoothing P 0312 : Butterworth (Butterworth) high-pa Platform: |
Size: 4096 |
Author:杨健 |
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Description: 雷达信号处理,针对现代雷达信号处理的主要方式，运用数字信号处理理论和 Matlab 软件研究雷达信号处理的仿真
问题。提出了一个仿真模型，该模型可以仿真雷达信号、热噪声与杂波的产生和雷达系统中信号的动态处理
过程。用 Matlab 对某脉冲压缩雷达信号处理系统进行了仿真，得到了雷达系统中各个处理点上的具体信号形
式，既包含幅度信息，又包含相位信息，该模型能较好地满足对雷达信号处理的仿真要求，显示了用 Matlab
仿真雷达信号处理系统的方便、快捷的优点。
-Radar signal processing, radar signal processing for the modern major mode of use of digital signal processing theory and Matlab software simulation of the radar signal processing problems. Proposed a simulation model, the model can be simulation of radar signals, thermal noise and clutter of the radar system in the generation and dynamic signal processing. Using Matlab for a pulse compression radar signal processing system simulation, radar systems have been various points on the treatment of specific signal form contains both amplitude information, but also contains the phase information, the model can better meet the needs of radar signal processing simulation requirements, shows the Matlab simulation using radar signal processing system convenient, fast advantages. Platform: |
Size: 157696 |
Author:wp |
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Description: 提出了一种基于小波域的图像数字水印算法·该算法将相互正交的两种水印(鲁棒水印和参考
水印)同时添加到经过DWT后的载体图像小波系数中,然后用小波反变换得到添加了水印的图像·用提取出
的参考水印来估计图像所受到的攻击,由于提取出的鲁棒水印所受的攻击与参考水印受到的攻击一样,因此
可以估计出原始的鲁棒水印·通过对嵌入水印的图像进行加入噪声、滤波、压缩以及裁剪等大量图像处理等试
验,均能正确检测出水印,表明该算法具有很好的感知效果和鲁棒性
-A wavelet-based image digital watermarking algorithm that the algorithm will be mutually orthogonal two watermarks (watermark robust watermarking and reference) at the same time added to the carrier after image after DWT wavelet coefficients, and then using wavelet transform has been Add a watermark image to use to extract a reference to estimate the watermark image by the attacks, as a result of the robust watermark extracted suffered attacks and the reference watermark by the same attack, it can be estimated through the original Robust Watermarking of the embedded watermark image by adding noise, filtering, compression and cutting, such as a large number of image processing such as testing, can correctly detect the watermark, show that the algorithm has good performance and robustness of perception Platform: |
Size: 190464 |
Author:李倩 |
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Description: ITU-T G.729语音压缩算法。
description:
Fixed-point description of commendation G.729 with ANNEX B Coding of Speech at 8 kbit/s using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) with Voice Activity Decision(VAD), Discontinuous Transmission(DTX), and Comfort Noise Generation(CNG).-ITU-T G.729 voice compression algorithms. description: Fixed-point description of commendation G.729 with ANNEX B Coding of Speech at 8 kbit/s using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) with Voice Activity Decision (VAD), Discontinuous Transmission ( DTX), and Comfort Noise Generation (CNG). Platform: |
Size: 111616 |
Author:kevin |
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Description: 合成孔径雷达图象处理的各种方法.斑点噪声的去除,图象分割的算法,以及压缩,去噪等内容.大家可以共同参考.-Synthetic aperture radar image processing methods. Speckle noise removal, image segmentation algorithm, as well as compression, denoising, etc.. We will be able to reference. Platform: |
Size: 36864 |
Author:杨红磊 |
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Description: 程序代码说明
P0301：数字图像矩阵数据的显示及其傅立叶变换
P0302：二维离散余弦变换的图像压缩
P0303：采用灰度变换的方法增强图像的对比度
P0304：直方图均匀化
P0305：模拟图像受高斯白噪声和椒盐噪声的影响
P0306：采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
-Procedure Code Description P0301: digital image data display matrix and its Fourier transform P0302: Two-dimensional discrete cosine transform image compression P0303: gray-scale transformation of the methods used to enhance image contrast P0304: Histogram of homogenization P0305: simulated images by Gaussian white noise and salt and pepper noise P0306: A two-dimensional median filtering function medfilt2 of interference by salt and pepper noise image filtering Platform: |
Size: 8192 |
Author:张平 |
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Description: MATLAB下通过多种小波实验了解小波变换的原理教程及示例代码
包括的多个示例源代码有：一维线性非线性近似、二维线性非线性近似、使用线性滤波过滤噪声、使用小波门限消除噪声、使用小波变换压缩一维信号、二维小波图像压缩等等。
-Under MATLAB wavelet through a variety of experiments to understand the principle of wavelet transform tutorial and sample code included in the source code has a number of examples: a linear one-dimensional non-linear approximation, nonlinear two-dimensional linear approximation, the use of linear filtering filter noise, the use of wavelet thresholding to eliminate noise, the use of one-dimensional wavelet transform compressed signal, two-dimensional wavelet image compression and so on. Platform: |
Size: 4382720 |
Author:aaa |
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Description: 1.0支持系统的录音多种格式,有一定的延时,没有过滤杂音功能.
2.0已取消支持系统的录音多种格式,使用PCM采集数据G711A压缩格式
(8000HZ单声道16位格式录音每秒以8K完成数据,16000HZ单声道
16位格式录音每秒以11K完成数据,音质相当好),延时降低到最小
100-500MS以内,不会随时间增加而增加延时(如果是说话测试一直保持
200MS的延时,如果是用播放歌曲来测试,有自动校正延时功能,恢
复成200MS的延时,恢复过程中不会中断歌曲的播放,只是小小加快唱
歌的速度,听觉不会觉察出来),加入了过滤杂音功能.-1.0 Support System for recording a variety of formats, has a certain degree of delay, there is no noise filtering feature has been canceled .2.0 support system recordings in multiple formats, the use of PCM data collection G711A compression formats (8000HZ mono audio format 16-per-second to 8K complete data, 16000HZ mono 16-bit format to 11K per second, recording the completion of data, sound quality quite good), delay to minimize 100-500MS within, will not increase with time delay (if it is to speak the test has remained 200MS the delay, if it is used to play songs to test, have automatic delay correction function, the restoration of 200MS into the delay, the recovery process will not be interrupted play songs, but little to accelerate the pace of singing, hearing is not perceived by ), joined the noise filtering function. Platform: |
Size: 372736 |
Author:刘鸿翔 |
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Description: Image Compression
A collection of simple routines for image compression using different techniques.
BTCODE:
Image compression Using Block Truncation Coding.
PYRAMID:
Image compression based on Gaussian Pyramids.
DCTCOMPR:
Image compression based on Discrete Cosine Transform.
IMCOMPR:
Image compression based on Singular Value Decomposition.
The given codes can be also used in 2D noise suppression.
Platform: |
Size: 10240 |
Author:林明 |
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Description: 一系列展示图像压缩技术的源代码。包括有：使用块截断编码的图像压缩(Block Truncation)、基于高斯金字塔变换的图像压缩(Gaussian Pyramids)、基于离散余弦变换对图像压缩(Discrete Cosine Transform)、基于奇异值分解(SVD)的图像压缩(Singular Value Decomposition)。给出的代码还可以用于2D图像噪声消除-A series of image compression technology to display the source code. Include: the use of block truncation coding for image compression (Block Truncation), based on the Gaussian pyramid transform for image compression (Gaussian Pyramids), based on the discrete cosine transform for image compression (Discrete Cosine Transform), based on singular value decomposition (SVD) Image compression (Singular Value Decomposition). Given code can also be used in 2D image noise cancellation Platform: |
Size: 44032 |
Author:李远 |
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Description: dctcom.m文件利用DCT变换完成对输入图像进行压缩；imagecbe.m完成对输入的两幅RGB图像用小波分析的方法进行图像融合 imagecom.m完成对输入的RGB图像用小波分析的方法进行自动降噪，得到高频系数阈值，降噪效果百分比和结果 wavelet1D.m完成对输入的一维信号进行多尺度离散小波分解 wavelet2D完成对输入的二维信号进行多尺度离散小波分解；zigzag.m完成对输入的8*8矩阵按照zigzag排列抽取数据.-document the use of DCT transform dctcom.m completion of the input image compression imagecbe.m completion of the two RGB input image with wavelet analysis method of image fusion imagecom.m completion of the input RGB image using wavelet analysis method automatically drop noise, the threshold of high-frequency coefficient, noise reduction effect and the results of the percentage of wavelet1D.m completion of the input signals of one-dimensional discrete wavelet multi-scale decomposition wavelet2D completion of the input signals of two-dimensional discrete wavelet multi-scale decomposition zigzag.m completed the input of 8* 8 matrix of data collected in accordance with the zigzag order. Platform: |
Size: 3072 |
Author:zhouhao |
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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: RLS算法，编写了MATLAB程序实现自适应干扰对消。给出信号实例，用于验证所编写程序的性能。所给信号为：①噪声与语音的混合信号——signalnosie.wav；②噪声信号——noise.wav。两信号均为立体声，PCM压缩，采样速率为48000Hz，采样精度16bits。-RLS algorithm, the preparation of a MATLAB program to achieve adaptive interference cancellation. Given signal instance, prepared by the procedures used to validate performance. The given signal as follows: ① noise with the voice of mixed-signal- signalnosie. Wav ② noise signal- noise. Wav. Two signals are stereo, PCM compression, sampling rate of 48000Hz, the sampling precision of 16bits. Platform: |
Size: 948224 |
Author:丁小天 |
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Description: 分块有损压缩图像忽略了块间相关性，重构时会产生块效应，该文提出一种空域自适应去块效应算法。对块边缘采用方向自适应
有理滤波，以弱化块效应。根据块的内部活动性将图像块分成平坦块和纹理块2 类，利用基于方差的空域检测方法检测出平坦块，并对平
坦块进行邻块边缘自适应平滑。实验结果表明，该算法有效去除了块效应，一定程度上提高了信噪比，算法简单且鲁棒性较好。-Block lossy compression image ignores the inter-block correlation, Reconstruction would have a blocking effect, the paper presents a airspace Adaptive Deblocking Algorithm. To block the edge of rational use of the direction of adaptive filtering, in order to weaken the block effect. According to block the internal activity of the image block is divided into a flat block and texture block 2 categories, the use of airspace based on the variance detection methods to detect the flat block, and a flat block adjacent block edge adaptive smoothing. Experimental results show that the algorithm effectively blocking go except, to some extent, improve the signal to noise ratio, the algorithm is simple and better robustness. Platform: |
Size: 147456 |
Author:子登 |
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Description: Calculate the Mean Square Error (MSE) and the Peak Signal to Noise Ratio (PSNR) for different JPEG compression ratios. Platform: |
Size: 180224 |
Author:Ahmed |
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Description: 语音噪声压缩新算法,一种基于vad的语音噪声抑制方法。这种新算法源于vad 技术及谱减法，它先对含噪声信号进
行vad处理，而后是基于感知掩蔽阈值的谱减法运算，降低噪声，获得清晰的增强信号。与其它算法相比，其效果更好，语
音听测试证明了这一点。-New algorithm for speech compression noise, a noise reduction of speech based vad method. This new algorithm derived from vad technology and spectral subtraction, it firstly deal with the noise signal vad, then the masking threshold is based on perception of spectral subtraction to reduce noise, increase access to clear signals. Compared with other algorithms, the better, speech test proves this point. Platform: |
Size: 101376 |
Author:lorry |
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Search - compression noise