Description: 对原始灰度图像 Lena_gray.bmp进行图像压缩实验
1．对此图进行 8×8 DCT 变换后，分别只保留 DC系数，以及保留前 4、8、16 个变换系数(DC＋AC) ，然后再分别进行 IDCT 变换，比较结果。
2．可以使用 Matlab - Image Processing Toolbox 中的函数实现。
-gray image of the original image compression Lena_gray.bmp an experiment. This diagram 8 8 DCT, the only difference reservations DC coefficient, and the preservation of the former 4, 8 or 16 DCT coefficients (DC+ AC), and then separately IDCT transformation, the results of the comparison. 2. Using Matlab-Image Processing Toolbox to achieve the function. Platform: |
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Author:朱晓路 |
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Description: 图像压缩，用matlab实现的，不知道是否受欢迎，望大家共同讨论学习-image compression using Matlab to achieve, and do not know whether the popular, we hope to discuss study Platform: |
Size: 1045504 |
Author:孙力 |
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Description: 利用97小波变换进行图像压缩，用matlab仿真，实验证明它具有较高的压缩比-using wavelet transform image compression using Matlab simulation experiment to prove that it has a higher compression ratio Platform: |
Size: 48128 |
Author:李江涛 |
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Description: 数字图像矩阵数据的显示及其傅立叶变换
二维离散余弦变换的图像压缩
采用灰度变换的方法增强图像的对比度
直方图均匀化
模拟图像受高斯白噪声和椒盐噪声的影响
采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
图像的自适应魏纳滤波
运用5种不同的梯度增强法进行图像锐化
图像的高通滤波和掩模处理
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
利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处理
-digital image data matrix display and its Fourier transform two-dimensional discrete cosine transform image compression using gray change The method for enhancing the contrast of the image histogram equalization simulated images by white Gaussian noise and Impulse noise impact 2D Median filter function medfilt2 right by the Salt and Pepper noise interference with the image filtering MATLAB functions fi lter2 right by the noise of image filtering images using adaptive filtering Weiner five different gradient growth Intensity image sharpening images and high-pass filter mask Processing Butterworth (Butterworth) lowpass Filter by the noise of the image smoothing use Butterworth (Butterworth) high-pass filter filter on the image sharpening Platform: |
Size: 10240 |
Author:王晓明 |
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Description: 利用小波分解与重构,实现图像去噪和压缩,可灵活选用其他小波,简单易懂,特别适合小波初学者.-using wavelet decomposition and reconstruction, Image Denoising and Compression, the flexibility to choose other wavelet is simple to understand and Wavelet particularly suitable for beginners. Platform: |
Size: 1024 |
Author:whq |
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Description: image compression using btc algorithm. matlab program. This function accepts an image(color or gray) and compresses it using the block truncation coding. -btc using image compression algorithm. Ma tlab program. This function accepts an image (c olor or gray) and compresses it using the block t runcation coding. Platform: |
Size: 1024 |
Author:jason.. |
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Description: 最新的用matlab实现的ＳＰＩＨＴ算法，实现对图像的高性能压缩。-Matlab using the latest achievement of SPIHT, the realization of high-performance image compression. Platform: |
Size: 14336 |
Author:whz |
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Description: 用MatLab实现图像压缩。以真彩图像的处理为例，对由它转换来的彩色索引矩阵进行二进小波多层分解，对低频近似的系数矩阵作相应的截取处理，以及优化索引图像的彩色图。-Realize image compression using MatLab. To deal with true color images for example, by its conversion to the color index matrix dyadic wavelet decomposition of multi-storey, low-frequency approximation of the coefficient matrix for the corresponding interception treatment, as well as the optimization of image color map index. Platform: |
Size: 446464 |
Author:郝鹏翼 |
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Description: 本程序利用奇异值分解对3通道彩色图像进行压缩分解，具体步骤如下：
压缩过程：
1. 选取子图像大小K值，把图像分解成M×M个子图像，IMG(s),s=1,2,…, M2，其中M=N/K，原始图像IMG大小为N×N。
2. 计算这M2个子图像的平均值average，对每幅子图像减去均值图像得到新图像。
3. 计算相关矩阵R，其元素定义为 。
4. 计算R的特征值与特征向量，计算每幅子图像与最大特征向量的内积，便得到编码，即压缩后的图像。
-This procedure using singular value decomposition of 3-channel color image compression decomposition, concrete steps are as follows: compression process: 1. Select the sub-image size K value, the image is decomposed into M × M sub-image, IMG (s), s = 1, 2, ..., M2, in which M = N/K, the original image IMG size N × N. 2. M2 calculate the average of sub-image average, for each sub-image minus the new images mean images. 3. Calculation of correlation matrix R, defined as its elements. 4. Calculation of the characteristics of R value and eigenvector calculated each sub-image with the largest eigenvector of the inner product, they will have to code, that is, the compressed images. Platform: |
Size: 334848 |
Author:wangweiming |
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Description: 图像压缩去噪增强锐化程序，供大家参考。
包括：数字图像矩阵数据的显示及其傅立叶变换
二维离散余弦变换的图像压缩
采用灰度变换的方法增强图像的对比度
采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
采用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
图像的自适应魏纳滤波
运用5种不同的梯度增强法进行图像锐化
图像的高通滤波和掩模处理
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
利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处理-Sharpen Image Compression Denoising enhanced procedures for your reference. Include: digital image data display matrix and its Fourier transform two-dimensional discrete cosine transform image compression method using gray-scale transformation of the contrast-enhanced images using two-dimensional median filter function by medfilt2 of salt and pepper noise image filtering using MATLAB The function affected by noise interference filter2 images mean filter Adaptive Image Filtering Wehner use five kinds of different gradient method to enhance image sharpening images of high-pass filtering and mask treatment using Butterworth (Butterworth) low pass filter noise by smoothing the images deal with the use of Butterworth (Butterworth) high-pass filter for sharpening images treatment Platform: |
Size: 11264 |
Author:张悦庭 |
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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: 利用DCT变化对tif图像进行压缩利用DCT变换进行图像压缩的MATLAB程序-Changes in the use of DCT compression of tif images using DCT transform image compression MATLAB program Platform: |
Size: 802816 |
Author:ruiomar |
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Description: hi this the code for image compression using different transoformation coding algorithms in wavelets,that is all wavelets-hi this is the code for image compression using different transoformation coding algorithms in wavelets,that is all wavelets Platform: |
Size: 4620288 |
Author:durga |
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Description: a dct code i tried.. the image compression using dct divides the image into various blocks n the performs the dct code on it -a dct code i tried.. the image compression using dct divides the image into various blocks n the performs the dct code on it .. Platform: |
Size: 1024 |
Author:anup |
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Search - image compression using matlab