Location:
Search - DFT DCT matlab
Search list
Description: 主要是对图像实现DFT,DCT变换，利用二维小波分析对图像作二层小波分解，显示条状图，十字图及频谱等-Realize the image is mainly DFT, DCT transform, the use of two-dimensional wavelet analysis of images for the second floor of wavelet decomposition, indicating strip maps, charts and cross spectrum
Platform: |
Size: 3072 |
Author: 袁辉 |
Hits:
Description: 基于DCT,DFT,DWT等的水印算法，还有加置乱的水印算法，用于图像处理方面-Based on the DCT, DFT, DWT, such as the watermarking algorithm, as well as increase the watermark scrambling algorithm, for image processing
Platform: |
Size: 16384 |
Author: 孔萍萍 |
Hits:
Description: 图像处理中的图像变换的源码与变换后的结果图，包括dct变换，dft变换，w-h变换等-Image Processing Image Transform source and transform the result of plans, including the DCT transform, dft transform, wh transform
Platform: |
Size: 2068480 |
Author: hs |
Hits:
Description: 频域法加入数字水印的原理是首先将原始信号（语音一维信号、图像二维信号）变换到频域，常用的变换一般有DWT、DCT、DFT、WP和分形。然后，对加入了水印信息的信号进行频域反变换（IDWT、IDCT、DFT、WP），得到含有水印信息的信号。-Frequency-domain digital watermarking method by adding the principle is that first of all, the original signal (voice signal of one-dimensional, two-dimensional image signal) to frequency domain transformation, commonly used in general transform DWT, DCT, DFT, WP and fractal. Then, adding the watermark information signal to the frequency domain inverse transform (IDWT, IDCT, DFT, WP), received signal containing the watermark information.
Platform: |
Size: 2048 |
Author: laura |
Hits:
Description: 该gui函数基本上包括图像处理里面的最基本处理，相当于一个小型photoshop。比如读取文件，几何变换中的垂直镜像，平移，旋转，缩放；正交变换的DFT，FFT，DCT，DST，DHT，DWashT；灰度处理中的反色，直方图均衡，全局线性变换，分段线性变换，指数非线性变换，对数非线性变换；图像增强里面的加噪声，平滑，锐化，伪彩色增强；图像分割里面的灰度阈值法，Robert，Laplace，sobel，prewitt，canny算子边缘检测法；图像恢复里面的直接逆滤波，维纳滤波；图像编码里面的霍夫曼编码，行程编码-Basically, the gui functions including the most basic image processing inside the handle, which is equivalent to a small photoshop. For example, read the document, the geometric transformation of the vertical mirroring, shifting, rotating, zooming orthogonal transformation of the DFT, FFT, DCT, DST, DHT, DWashT anti-gray color processing, histogram equalization, global linear transformation , piecewise linear transformation, index of non-linear transform of the number of non-linear transformation image enhancement which increases the noise, smoothing, sharpening, pseudo-color enhancement the gray-scale image segmentation inside the threshold, Robert, Laplace, sobel, prewitt, canny edge detection operator method image restoration inside direct inverse filtering, Wiener filtering image coding inside the Huffman code, and so on Run-Length Coding
Platform: |
Size: 398336 |
Author: guhuxiang |
Hits:
Description: Matlab实现多种水印的嵌入与提取(DFT DCT等)-Matlab to achieve a variety of watermark embedding and extraction (DFT DCT, etc.)
Platform: |
Size: 154624 |
Author: guojinghua |
Hits:
Description: 运用MATLAB语言，对于给定的图片，做DFT,DCT等各种变换，并进行压缩-The use of MATLAB language, for a given picture, do DFT, DCT and other transforms, and compression
Platform: |
Size: 241664 |
Author: 陈濛 |
Hits:
Description: 用matlab对一张图片进行DFT变换，DCT变换,比较保留20个DCT变换系数重构的图象与原始图像的差别.-Using matlab on a picture to DFT transform, DCT transform, compared to 20 DCT transform coefficients to retain the image reconstruction of the difference between the original image.
Platform: |
Size: 455680 |
Author: tosh |
Hits:
Description: kl变换，dct，dft变换以及信号压缩-kl transform, dct, dft transform and signal compression
Platform: |
Size: 1024 |
Author: 蒋伟 |
Hits:
Description: 无限长的序列也往往可以用有限长序列来逼近。对于有限长的序列我们可以使用离散傅立叶变换（DFT）。DFT是对序列傅立叶变换的等距采样。是序列傅立叶变换的等距采样。
本源码是对DCT、DFT、FFT的matlab实现-Infinitely long sequence is often a long sequence with limited approximation. For the finite length of the sequence we can use the discrete Fourier transform (DFT). DFT is a sequence of equidistant sampling Fourier transform. Is a sequence of equidistant sampling Fourier transform. The source is the DCT, DFT, FFT in matlab implementation
Platform: |
Size: 4096 |
Author: 龙的传人 |
Hits:
Description: 对数字图像处理中的离散傅里叶变换(DFT),离散余弦变换（DCT）进行了详细的分析。其中DFT包括log视觉处理，中心点移动等。DCT包括分块处理，和保留较少系数，并比较结果。-Digital image processing of the discrete Fourier transform (DFT), discrete cosine transform (DCT) for a detailed analysis. DFT which include the log of visual processing, the center of movement. Including sub-block DCT processing, and retention of small coefficients, and compare the results.
Platform: |
Size: 390144 |
Author: pxjy |
Hits:
Description: MATLAB图像变换源码，包括CWT、DCT、DFT和DWT。-Matlab image from source code, including cwt, dct, dft and dwt.
Platform: |
Size: 219136 |
Author: 孙浩 |
Hits:
Description: matlab中的循环卷积，DFT,DCT，它在数字信号处理方面有很大地作用-circular convolution in matlab, digital signal processing, it has greatly effect
Platform: |
Size: 3072 |
Author: 汪照 |
Hits:
Description: 数字水印嵌入和提取算法 包含时空域和变换域的算法的matlab实现-Airspace and transform domain algorithm matlab achieve the digital watermark embedding and extraction algorithm contains
Platform: |
Size: 377856 |
Author: 陈龙 |
Hits:
Description: DFT和DCT在matlab中的一个基本实现(An implementation of DFT and DCT in matlab.)
Platform: |
Size: 1024 |
Author: Aria丶煙火
|
Hits:
Description: 使用matlab对图像进行dct、dft变换（通过原理实现算法）(Using MATLAB to carry out DCT and DFT transform (through principle implementation algorithm))
Platform: |
Size: 324608 |
Author: Bryinexcitation
|
Hits:
Description: 编程实现二维8*8图像块的DFT，DCT变换
输入一副RGB图像，将其转化为YCbCr颜色空间，然后对Y分量做分块DFT变换，保存为灰度图像，统计计算时间
编程实现8*8块DCT变换,然后分别显示，当使用64个DCT系数里面的一些系数进行重构，比较其质量；同时熟悉采用FFT来实现DCT变换的思想，并显示2维8*8DCT变换的基函数图像(Programming the DFT, DCT transform of two dimensional 8*8 image block
Input a pair of RGB images, transform it into YCbCr color space, then divide the Y component into block DFT transform, save as gray image, and calculate the calculation time
The 8*8 block DCT transform is implemented by programming, and then it is shown that when using some coefficients in 64 DCT coefficients, the quality is reconstructed. Meanwhile, the idea of DCT transformation is familiar with FFT, and the base function image of the 2 dimensional 8*8DCT transform is displayed.)
Platform: |
Size: 3072 |
Author: 雪鹊
|
Hits:
Description: dct dft 功能实现，附实验图片lena.png(dct dft implement with lena.png)
Platform: |
Size: 226304 |
Author: jaydu1 |
Hits:
Description: 2维dct变换，离散余弦变换(DCT for Discrete Cosine Transform)是与傅里叶变换相关的一种变换，它类似于离散傅里叶变换(DFT for Discrete Fourier Transform),但是只使用实数。(DCT for Discrete Cosine Transform)
Platform: |
Size: 1024 |
Author: YOUNGJACK |
Hits:
Description: 本课题为基于MATLAB的小波变换dwt和离散余弦dct的多方法对比数字水印系统。带GUI交互界面。有一个主界面GUI，可以调用dwt方法的子界面和dct方法的子界面。流程包括，读取宿主图像和水印图像，嵌入，多种方法的攻击（剪切，加噪，旋转等），提取，最后利用psnr峰值信噪比进行评价不同攻击下，鲁棒性的好坏。(This project is based on MATLAB wavelet transform DWT and discrete cosine DCT multi method contrast digital watermarking system. With GUI interactive interface. There is a main interface GUI, which can call the sub interfaces of DWT method and DCT method. The process includes: reading host image and watermark image, embedding, attacks of various methods (cutting, adding noise, rotation, etc.), extracting. Finally, PSNR peak signal-to-noise ratio is used to evaluate the robustness of different attacks.)
Platform: |
Size: 10000384 |
Author: MATLAB道长 |
Hits: