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ImageCompressed.rar
- 利用霍夫曼编码算法对数字图像进行压缩及解压缩处理，解压出来的图像与源图像几乎完全一致，峰值信噪比为无穷大,The use of Huffman coding algorithm for digital image compression and decompression processing, extracting images from the source image is almost exactly the same infinite PSNR
amcap_mod
- 上传代码是经过修改的directshow例程amcap,增加了分辨率枚举，捕获图像，修改jpeg压缩比的功能。-This is a modified version of DirectShow demo, amcap, which has been added three functions, Resolution enumeration, capturing images, modifing jpeg compression ratio.
A_new_algorithm_of_image_compress_based_on_BP_neur
- 本文探讨了神经网络用于图像压缩的方法，提出了一种基于边缘信息检测的BP神经网络压缩方法:按图像各部分像素特征将图像分为平滑块、纹理块和边缘块，不同的分类块采用不同的隐含层数。实验结果证明本算法在在保证重建图像丰富细节的同时，能大大提高图像的压缩比。-This paper discusses the neural network for image compression method, edge information is presented based on BP neural networ
DCT
- 基于Matlab GUI的图像的DCT，自由调节压缩率，计算峰值信噪比，并图形化对比还原图像-Matlab GUI for image-based DCT, freely adjust compression rates, the peak signal to noise ratio, and reduction of image contrast graphic
image-compression-with-PCA
- 对400幅灰度图像用分块PCA的方法进行压缩，进行通信时只用传输主元和特征向量。其中，pcaxiefangcha.m用于图像压缩，imresume.m用于图像恢复和部分图像的显示，chaweight.m用于绘制特征值比重-主元个数关系图，crdraw.m用于绘制压缩比-主元个数关系图，psnrdraw.m用于绘制总误差PSNR-主元个数关系图，psnrlocation.m用于绘制单幅图像误差PSNR分布图。-On the 400 block with a gray image compressi
JPEG2000_9_7_002.pdf
- 基于实数的二进制表示法，把CDF(Cohen，Daubechies and Feauveau)9／7双正交小波基的提升系数化为二进制，采用简单的移位一加操作代替结构复杂的浮点乘法器，从而实现了JPEG2000中9／7离散小波变换的定点计算．相对于浮点计算法，移位一加操作最大的优点是计算简单，特别易于超大规模集成电路实现，因而使硬件实时处理图像信号成为可能．实验仿真结果表明：在低压缩比的情况下，用移位一加操作重构的图像，其峰值信噪比(PSNR)只比浮点法低0．10 dB，当压缩比增大时，其PSNR
tuxiangqukuang
- 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, Rec
IMageQualityEvaluatingFunction
- 两个图像质量评价函数，psnr峰值信噪比，正则均方误差nmse，能可用于去噪图像和压缩图像的质量评价，很有用啊。-Two image quality evaluation of the function. Including psnr PSNR, it is mean-square error nmse other. Images can be used for de-noising and compression of image quality evaluation.
AnImageEncodingArithmeticBasedOnEmbeddedZerotreeWa
- 利用本文算法有效克服了传统余弦变换编码在 高压缩比时产生方块效应, 而且相同压缩比下, 图像 复质量明显优于Shapiro 提出的EZW算法。本文算法 对EZW有了一定的改进, 具有一定的优势。-In this paper, the effective use of algorithms to overcome the traditional cosine transform coding in high compression ratio when blocking, and un
DCT
- 本文介绍了基于DCT 的图像压缩编码技术, 并给出了具体的实现方法和步骤, 既保证具有较高的压缩比, 又保证了较好的图像 质量。-This paper introduces the coding of image based on DCT , therefore,shows the details of realization . It provides high compressibility and high quality.
ObjectiveFidelityCriteria
- 本实验要求编写一个计算压缩-解压缩图像的均方根误差、均方信噪比的程序。该程序是一个通用程序。编写程序产生图示的结果。使用上面的保真度准则程序计算可视信息的损失特性。-Prepared in this experiment, a calculation of compression- decompression of the root-mean-square error of image, mean square signal to noise ratio of the procedure. Th
pso-image
- 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
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
PSNR
- 峰值信噪比在信号处理中经常用到，这是一个将原始图像和压缩图像的峰值信噪比进行比较的例子。-Peak signal to noise ratio is often used in signal processing, which is a the original image and compressed image peak signal to noise ratio compared examples.
LZW_Demo
- 实现对图像的lzw压缩编码 得到图像的压缩比以及码长-Lzw realize image compression coding of image compression ratio as well as the code length
PSNR
- 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
bianma
- 对电视中偶尔看到的雪花图像进行编码和解码，和测试图像的压缩比和图像质量进行比较。-Occasionally seen on the TV snow image encoding and decoding, and the test image compression ratio and image quality were compared.
XIAOBO
- 小波分析有它独特的特点。它的压缩比高、压缩速度快 , 压缩后能保持信号与图像的特征基本不变 ,且在传递过程中可以抗干扰。可以克服传统方法产生的缺陷 ,因此获得了较好的压缩效果。 -Wavelet analysis has its unique characteristics. Its high compression ratio, compression speed, compressed to maintain the basic characteristics of the sign
ImageCompress
- 利用主分量分析技术进行图像压缩，实验证明该算法具有很好的压缩比-Using principal component analysis for image compression, experimental results show that the algorithm has very good compression ratio
tuxiangyasuo
- 利用Matalab软件分别编写子函数实现数字图像压缩及解压缩处理，并统计分析压缩处理算法所能够实现的压缩比及解压图像和原始图像间的均方根误差。-Functions were written by Matalab software for digital image compression and decompression processing, and statistical analysis of compression algorithms to achieve the compressi