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Description: 1.图像频域处理正交变换的matlab实例
2.含有的频域变换内容如下：
正交变换通用算子
傅立叶变换
傅立叶变换的原理
傅立叶性质
二维离散傅立叶变换（ 2DDFT ）
快速傅立叶变换（ FFT ）
傅立叶变换的研究与应用
离散余弦变换
DCT 变换矩阵
dct2 函数和 dctmtx 函数
Walsh- Hadamard 变换
Radon 变换 -1. Image processing orthogonal frequency-domain transform Matlab two examples. Containing the frequency domain transform as follows : orthogonal transformation generic operator Fourier transform theory of Fourier transform two-dimensional Fourier nature of discrete Fourier transform (2DDF T) Fast Fourier Transform (FFT) of the Fourier transform and discrete cosine transform matrix dc t2 function and the function dctmtx Walsh-Hadamard transform Radon transform
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Size: 5616 |
Author: 方周 |
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Description: to understand the Algorithm go to matlab help in page dct2 and idct2 to get the mathematical expression
for M = N = 8, we can calculate the most of hard values and save it as LUTs to speed up the execution
now compare our special 8X8 functions with the internal general functions
use this code:
A = int32(100*rand(8,8))
tic for i = 1 : 1000 IDCT_8X8(DCT_8X8(A)) end toc
tic for i = 1 : 1000 idct2(dct2(A)) end toc
i had built the general functions too, but with low speed
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Size: 1180 |
Author: hujik |
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Description: 1.图像频域处理正交变换的matlab实例
2.含有的频域变换内容如下：
正交变换通用算子
傅立叶变换
傅立叶变换的原理
傅立叶性质
二维离散傅立叶变换（ 2DDFT ）
快速傅立叶变换（ FFT ）
傅立叶变换的研究与应用
离散余弦变换
DCT 变换矩阵
dct2 函数和 dctmtx 函数
Walsh- Hadamard 变换
Radon 变换 -1. Image processing orthogonal frequency-domain transform Matlab two examples. Containing the frequency domain transform as follows : orthogonal transformation generic operator Fourier transform theory of Fourier transform two-dimensional Fourier nature of discrete Fourier transform (2DDF T) Fast Fourier Transform (FFT) of the Fourier transform and discrete cosine transform matrix dc t2 function and the function dctmtx Walsh-Hadamard transform Radon transform
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Size: 5120 |
Author: 方周 |
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Description: to understand the Algorithm go to matlab help in page dct2 and idct2 to get the mathematical expression
for M = N = 8, we can calculate the most of hard values and save it as LUTs to speed up the execution
now compare our special 8X8 functions with the internal general functions
use this code:
A = int32(100*rand(8,8))
tic for i = 1 : 1000 IDCT_8X8(DCT_8X8(A)) end toc
tic for i = 1 : 1000 idct2(dct2(A)) end toc
i had built the general functions too, but with low speed -to understand the Algorithm go to matlab help in page dct2 and idct2 to get the mathematical expressionfor M = N = 8, we can calculate the most of hard values and save it as LUTs to speed up the executionnow compare our special 8X8 functions with the internal general functionsuse this code: A = int32 (100* rand (8,8)) tic for i = 1: 1000 IDCT_8X8 (DCT_8X8 (A)) end toc tic for i = 1: 1000 idct2 (dct2 (A)) end toc i had built the general functions too, but with low speed
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Size: 1024 |
Author: hujik |
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Description: 传统的DCT数字水印的提取程序，是matlab的，通过编译，绝对可以提取-Traditional DCT digital watermark extraction procedure is matlab through the compiler, I absolutely can extract
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Size: 1024 |
Author: zhutong |
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Description: 第十章 MATLAB 图像正交变换
10.1 正交变换通用算子
10.2 傅立叶变换
10.2.1 傅立叶变换的原理
10.2.2 傅立叶性质
10.2.3 二维离散傅立叶变换（ 2DDFT ）
10.2.4 快速傅立叶变换（ FFT ）
10.2.5 傅立叶变换的研究与应用
10.3 离散余弦变换
10.3.1 DCT 变换矩阵
10.3.2 dct2 函数和 dctmtx 函数
10.4 Walsh- Hadamard 变换
10.5 Radon 变换
10.6 小波变换
10.6.1 小波的定义
10.6.2 小波变换函数
10.6.3 小波变换实例
10.6.4 小波除噪与压缩函数 -Chapter X MATLAB image orthogonal transformation orthogonal transformation 10.1 GM 10.2 Operators 10.2.1 Fourier transform Fourier transform Fourier 10.2.2 the nature of the principle of two-dimensional 10.2.3 Discrete Fourier Transform (2DDFT) 10.2 .4 Fast Fourier Transform (FFT) 10.2.5 Fourier Transform 10.3 Research and Application of Discrete Cosine Transform 10.3.1 DCT transformation matrix 10.3.2 dct2 function and dctmtx function 10.4 Walsh-Hadamard Transform 10.5 Radon Transform 10.6 wavelet transform 10.6.1 the definition of wavelet function 10.6.2 Wavelet Transform Wavelet Transform 10.6.3 Examples 10.6.4 Wavelet Denoising and Compression Functions
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Size: 5120 |
Author: 王万国 |
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Description: 对girl图像做二维DCT，并通过对变换后的某些系数置零达到压缩目的-Girl doing two-dimensional images of the DCT, and through certain coefficients transformed to achieve compression purpose of nulling
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Size: 1024 |
Author: shirley |
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Description: JPEG图像压缩和解压MATLAB程序，使用了DCT2、线性量化编码、zigzag变换和游程编码理论-JPEG image compression and decompression MATLAB procedures, using DCT2, linear quantization coding, zigzag transform and run-length coding theory
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Size: 97280 |
Author: 胡 |
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Description: 求图像的熵以及两幅图像间的交叉熵，自己验证可以使用，放心下载！-Entropy, as well as for the image between two images of the cross-entropy, can be used to verify their own, rest assured that download!
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Size: 1024 |
Author: xuehu |
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Description: 数字水印DCT算法设计，可以进行优化，希望大家一起将程序优化-DCT digital watermarking algorithm designe，it can be optimized and I hope that everyone can work together to optimized it.
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Size: 1024 |
Author: Spring |
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Description: 本压缩包包括多种水印代码，其中有DCT1,DCT2,CDMA,LSB等。-The package includes a variety of watermarking compressed code, which DCT1, DCT2, CDMA, LSB and so on.
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Size: 1995776 |
Author: hide |
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Description: 利用matlab的DCT2函数，对图像做变换并压缩。并用8*8对图像分块，对每一块计算均方值作为阈值。-DCT2 use the matlab function, and transform the image so compressed. And 8* 8 image block, a calculation of each mean square value as a threshold.
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Size: 1024 |
Author: 马丁 |
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Description: matlab的JPEG压缩程序,使用DCT2,行程变换-The JPEG compression program of matlab
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Size: 59392 |
Author: freedom |
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Description: 本代码是利用matlab实现dct变换，作用后效果可见
-This code is to use matlab to achieve dct transform, the role can be seen after the effect
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Size: 2048 |
Author: 李民 |
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Description: dct2的编程实现，用来压缩灰度图像，需要修改输入的图像名，保持和程序里的名称一致-dct2' s programming is used to compress grayscale images, need to modify the input image name, the name of maintaining and procedures where the same
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Size: 1024 |
Author: 颜洪雷 |
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Description: 本程序是在VC++编译环境下，用纯C语言编写的2D-DCT变换，程序中用的是一个4*4的矩阵进行的变换，可以改为对一幅图像进行。运算结果正确，在Matlab中进行了检验，dct2()指令即进行DCT变换。有一定的参考价值。-This procedure is in VC++ compiler environment, written in pure C 2D-DCT transform, the program used is a 4 x 4 matrix for the transformation can be changed to an image. Computation result is correct, was tested in Matlab in, dct2 () command that is to DCT transform. Some reference value.
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Size: 1024 |
Author: 浪飞人海 |
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Description: program matlab for encode jpeg picture using dct2, RLE, and huffman encoding
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Size: 2048 |
Author: Ahmed |
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Description: 对frame1进行一个简化的帧内编码方案: A)将图像分为8x8的块. B)将图像每一块做DCT2变换. C)将DCT系数采用11.ppt page 35的亮度量化表量化. 量化系数 = 取整 (DCT系数./量化表). D) 统计整个图像中非零量化系统的比重, 该比重可反映什么? E) 将量化系数进行 IDCT2, 绘制出重建图像.-a example for matlab to deal with a picture
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Size: 1024 |
Author: 姚晓栋 |
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Description: 数字水印研究及Matlab仿真实现-基于DCT2的水印嵌入与提取程序，有结果说明，具有较强的鲁棒性-Digital watermarking and Matlab Simulation- based DCT2 watermark embedding and extraction procedures, results indicate that, with a strong robustness
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Size: 282624 |
Author: 韩天明 |
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Description: 基于DCT变换的数字视频水印源程序，在Matlab中可以直接运行-DCT-based digital video watermarking source code in Matlab can be run directly
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Size: 9652224 |
Author: Etone |
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