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bianmashiyan
- 数字图像处理实验 根据原图像的直方图,发现背景和目标的分割值大约在130左右,并将灰度图像转为二值图像,分割效果比较理想。 图像处理实验(六)图像压缩与编码 实验目的: 学习JPEG压缩编码 实验内容: 一.实现基本JPEG的压缩和编码分三个步骤: 1. 首先通过DCT变换去除数据冗余; 2. 使用量化表对DCT系数进行量化; 3. 对量化后的系数进行Huffman编码。-digital image processing experiments based on
dct83ct
- 这是四维DCT变换的代码,对DCT压缩变换感兴趣的人可以将此作为参考,个人认为非常好。-This is the four-dimensional DCT code, the DCT compression for interested persons can be used as a reference. personal view is very good.
DCT-compress
- 把图像分成8x8的图像块进行DCT变换压缩,再用霍夫曼编码,其中DCT变换未调用matlab 的函数,可以满足一些作业的要求-The image is divided into 8x8 image blocks of compressed DCT transform, then Huffman coding, which is not the DCT matlab function calls, meet some of the requirements of the job
DCT
- DCT变换的C语言实现, DCT变换的C语言实现-DCT-C language,DCT-C language,DCT-C language,DCT-C language,
FFT-DCT
- 这两个程序分别是对图像进行FFT变换和DCT变换。-zhe liang ge cheng xu shi dui tu pian jin xing FFT and DCT bian huan .
Based-on-digital-watermarking-of-DCT
- 基于DCT变换的数字水印技术,初步编程,适合初学者使用,简单易行-Based on digital watermarking of DCT, preliminary program, suitable for beginners to use, simple
DCT-based-digital-watermarking
- 采用DCT变换的数字水印,简单,能够运行,适合毕业设计使用-Use of DCT watermark, simple and able to run for graduation design use
DCT-dctrestructuring-code
- DCT变换后,各子带系数重组后的显示图(和小波变换的性能对照,体现了DCT 的多分辨率性能),已经测试了,可以使用-After the DCT transform coefficients of each sub-band after the restructuring is shown in Figure (wavelet transform performance and control, reflecting the multi-resolution performance of DCT)
dct--matlab
- dct变换 提高图像数据压缩 效果较好-Dct transform to improve the image data compression is better
Graph-Code-and-DCT
- 图像编码解码以及图像的DCT变换,附原图及结果,代码有相关说明。-Graph Code and DCT
DCT
- 该代码是对图像进行DCT变换,并显示变换后的图像和频谱-The code is DCT transforms the image and displays the transformed image and spectrum
水印
- dct变换嵌入水印并实现提取,最后测试三种不同攻击对水印的影响(The DCT transform embeds watermark and realizes the extraction. Finally, the influence of three different attacks on watermark is tested)
dct·dft
- 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))
dct
- 对图像进行二维离散余弦函数变化时,可使用dctmtx函数进行DCT变换(When the two-dimensional discrete cosine function is changed to the image, the dctmtx function can be used for DCT transformation)
DFT&DCT
- 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
DCTtranslation
- 选取一个图像,并对它进行DCT变换和逆变换。(Select an image and carry out DCT transform and invert change.)
H264BSAnalyzer-master1
- DCT变换,H.264解析软件,比较好用,能解析出I帧,P帧,B帧(DCT transform ,h.264,P frame,B frame, i Frame)
dct
- 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)
MATLAB数字水印[dwt+dct多攻击+GUI界面]
- 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 topic is based on MATLAB wavelet transform DWT and discrete cosine DCT multi method comp
DCT,DWT,DFT,LSB数字水印MATLAB+GUI界面
- 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 co