搜索资源列表
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
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
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
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.
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
RLE
- 基于小波的图像压缩方法——游程编码,其中包括计算PSNR值,压缩比和运行时间。-Wavelet-based image compression method- RLE, including the calculation of PSNR value, the compression ratio and running time.
dct
- 在8*8子图像块前提下,不同压缩比对图像压缩效果的影响-8* 8 sub-image block under the premise of different compression than the image compression
jpeg2000_matlab
- JPEG 2000是基于小波变换的图像压缩标准,由Joint Photographic Experts Group组织创建和维护。JPEG 2000通常被认为是未来取代JPEG(基于离散余弦变换)的下一代图像压缩标准。JPEG 2000文件的副档名通常为.jp2,MIME类型是image/jp2。 JPEG 2000的压缩比更高,而且不会产生原先的基于离散余弦变换的JPEG标准产生的块状模糊瑕疵。JPEG 2000同时支持有损数据压缩和无损数据压缩。另外,JPEG 2000也支持更复杂
DCT
- 利用DCT变换对灰度图像进行压缩,求出压缩比;对比不同压缩比的图像-DCT transform compressed gray image compression ratio is obtained comparing different image compression ratio
tuxiangyasuo
- (1)试利用函数dct2,对该图像进行压缩。压缩时可尝试对DCT 变换后的系数采用不同取舍方法,比较其压缩性能。(函数dct2在matlab本身是有的,可以help dct2看看) (2)结合课本例8.7.2 的量化方法,对每一个经DCT变换后的8×8 矩阵量化(Huffman编码部分可省略),从而实现图像压缩。在一定压缩比的情况下,和⑴给出的图像质量相比较。 (3)用所给的子子程序fast_LOT.m 实现对该图像的变换与压缩,并和(1)得出的图像质量相比较-(1) Test usin
image_XB_2
- 此文件为一代小波变换的matlab源码程序,用于图像压缩。压缩比可以自己设定。-This document generation wavelet transform matlab source program for image compression. The compression ratio can be set.
lzw
- LZW(Lempel Ziv Welch)压缩编码是一种先进的数据压缩技术,属于无损压缩编码,该编码主要用于图像数据的压缩。对于简单图像和平滑且噪声小的信号源具有较高的压缩比,并且有较高的压缩和解压缩速度。-lzw compression
HuffmanCode
- 对给定的图像矩阵进行哈夫曼编码,并用matlab实现,求出压缩前后的压缩比-Given image matrix Huffman coding, and using Matlab to achieve compression ratio obtained before and after compression
huffman
- 采用压缩比和信噪对压缩效果进行评价。主要从是否含有噪声和图像格式不同两方面对比,评价图像压缩效果。-Compression ratio and signal-to-noise compression were evaluated. Contrast mainly from the presence of noise and image formats, the evaluation image compression effect.
tuxiangyasuo
- matlab程序:基于dct的任意压缩比的图像压缩的实现。-Matlab program: to achieve arbitrary DCT compression ratio of image compression based on.
DCT中值均值
- 1)图像平滑算法程序设计: 2)DCT压缩(保留不同系数),要求显示原图像、压缩后图像的文件大小、压缩比或算术编码压缩
data-compress
- 可以能实现对数据图像的压缩,并计算压缩比,。-Can realize image compression of the data, and calculates the compression ratio.
image-compression-final
- DCT算法对图像进行压缩解压,并且计算压缩比-The DCT algorithm to calculate the compression ratio for image compression decompression
BmpToJpgJpgToBmp
- 实现jpeg压缩和解压缩,将彩色图像进行颜色空间转换、对不同的颜色分量进行不同的采样、对于3个分量进行8×8的DCT变换、对DCT系数矩阵按照JPEG推荐的量化表进行量化;对量化后的系数进行Z形扫描,最后进行熵编码,形成码流,计算比特数,和压缩比。解压从量化后的DCT系数表开始逆向进行-Jpeg compression and decompression, the color image is a color space conversion, the different color compo
wavelet
- 小波变换实现的图像压缩编码,小波分解使用两层分解,然后重构,压缩比可以达到4/1-Wavelet transform image compression coding, the use of two wavelet decomposition and reconstruction, the compression ratio can be up to 4/1