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imagetransformationbymatlab
- 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 freq
cxrDCT
- DCT1实现一维离散余弦变换; DCT2实现二维离散余弦变换; 其中使用的算法是碟形算法来实现频域变换-DCT1 peacekeeping achieve a discrete cosine transform; DCT2 achieve two-dimensional discrete cosine transform; the use of the algorithm is dishing algorithm to achieve the transformation frequen
DCT2-lele
- 利用蝶形算法类似于FFT,利用先行再列实现二维DCT。速度很快。包含反DCT的代码。-similar to the use of butterfly FFT algorithm, the first re-use of 2D DCT out. Very fast. Contain anti - DCT code.
DCT_IDCT
- 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 functi
对girl图像做二维DCT
- 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
DCT.rar
- 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.
DCT2SHIXIAN
- 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
DCT2
- 數位浮水印影像離散餘弦轉換處理程式,含ForwardDCT與InverseDCT兩種方法。-Digital watermark image discrete cosine conversion processing program, including ForwardDCT with InverseDCT two ways.
Ten
- 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
image_compression_final(jpeg)
- 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
Image
- 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!
lotsofwatermarkcode
- 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.
DCT2
- 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
t4_4
- 利用离散余弦变换函数(dct2和idct2)模拟JPEG压缩过程。 对“lena.bmp”做压缩,观察压缩效果。(JPEG压缩过程: 首先把原始的图像划分为8×8的子图像,然后利用dct2分别 对各个子图像进行离散余弦变换,对变换系数仅保留左上角15个值, 然后利用这15个系数进行离散余弦反变换重新得到各个子图像,再 将子图像拼接成完整图像) -Using discrete cosine transform function (dct2 and idct2) analog JPEG co
dct2
- 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
test_dct
- 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 transformat
test_dct
- 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 transformat
picture
- 利用函数dct2,对图像进行压缩。并使用量化方法,对每一个经DCT变换后的8×8 矩阵量化,从而实现图像压缩。-Use function dct2, the image compression. And the use of quantitative methods, each DCT transformed matrix 88 after quantization, in order to achieve image compression.
myDCT
- 用解析式定义或矩阵式定义自行编写进行二维DCT和离散沃尔什-哈达玛变换的函数。 在Matlab中对给定图像进行二维离散傅立叶变换,并显示其居中的频谱图,可用Matlab自带函数进行实验。 分别用Matlab自带的dct2()和idct2()对给定图像进行二维DCT变换,并以图像的形式显示其变换系数矩阵。 -And the preparation of two-dimensional DCT is defined analytically discrete Wals