Location:
Search - DCT A
Search list
Description: 一个快速算法的例子，有和一般算法的比较--A example about fast algorithm , it has been comparied with common algorithms
Platform: |
Size: 55296 |
Author: 站长 |
Hits:
Description: 一种基于DCT域的MPEG-4编码器改进方法-a DCT-based MPEG-4 encoder Improvement
Platform: |
Size: 390144 |
Author: 景仁 |
Hits:
Description: 一个基于DCT变换域的数字水印系统实例-based on a DCT domain of digital watermarking system examples
Platform: |
Size: 19456 |
Author: xy |
Hits:
Description: 对原始信号做DCT的算法：Cox 和Piva 等人提出的DCT技术的经典之作。Cox利用随机数发生器产生标准正态序列作为水印信息对图像进行整体DCT变换后，选取除去DC系数之外部分较低频率系数叠加水印信息 Piva则修改整幅图像的中频部分。对原始信号分块后，再作DCT的算法：Hsu和Wu 把图像进行8*8分块，将一个二进制序列作为水印放入DCT的中频区；有些学者则计算整个图像的DCT，把一个实数序列嵌入DCT的中频系数上。选择中频区的好处是一方面尽量减少嵌入信息对图像主观视觉的影响；同时，尽量避免有损压缩对水印信息可能带来的损失。还有一种DCT方法就是把水印信息嵌入到高频系数上，但是采用这种方法，抗压缩性非常差。-done to the original signal DCT algorithm : Cox Piva and others made the DCT technology classic. Cox using random number generator producing standard normal sequence information as a watermark image of the overall DCT, DC coefficient selection removed outside some lower frequency coefficient superposition watermark information Piva will be replaced by images of the entire IF part. The original signal block, before making the DCT algorithm : Wu Hsu and put images 8* 8 block, a binary sequence as watermarks Add DCT IF; Some scholars calculated whole image of DCT, a real sequence embedded IF DCT coefficients. IF the choice is a good one to minimize the embedded information to the subjective visual images; Meanwhile, try to avoid Compression right watermark information possible losses. There
Platform: |
Size: 33792 |
Author: 圣子到 |
Hits:
Description: 一个基于DCT域的数字水印代码，里面有详细的注释说明。-This is a digital watermarking sourcecode based on DCT.Attached with detailed comments and explanation.
Platform: |
Size: 491520 |
Author: 符号 |
Hits:
Description: 有一个机遇DCT域的数字水印算法，里面有详细的注释说明，可以拿来研究-This is a DCT watermarking algorithm attached with detailed comments and explanation, which can be used for research purpose.
Platform: |
Size: 494592 |
Author: 符号 |
Hits:
Description: 当要隐藏信息时,在MATLAB的命令窗内输入命令: hide = myhide(carry,signal,x,y)； carry 用你的原始载体文件名代替，signal 用你所要隐藏的文件名代替 carry 和 signal 都必须是 *.* 的形式（注意不能省略单引号） x,y 是选取隐藏信息的位置坐标，在（x,y）和（y,x）处 生成的伪装载体文件名为hide.bmp 注意myhide.m文件，载体文件，隐藏文件都要在当前目录(current Directory)下 当要提取信息时，在MATLAB命令窗内输入命令： behidden = myinhide(carry,x,y)； carry 用你的伪装载体文件名代替,格式为 *.* （注意不要丢掉单引号） x,y 是选取隐藏信息的位置坐标，在（x,y）和（y,x）处，这必须和嵌入时所选位置一致。 提取出的信息文件名为behidden.bmp 同样，要注意behidden.m和伪装载体文件都要在当前目录(current Directory)下-when to hide information, in order MATLAB within a window orders : hide = myhide (carry, signal, x, y); Carry with you the original document name instead vector, signal used to hide your name in the paper and instead carry signal must be in the form of*.* ( not to single quotes omitted) x, y is to select the location of hidden information coordinates (x, y) and (y, x) The formation of camouflage vector document, entitled hide.bmp attention myhide.m documents, vector documents hidden all the documents in the current directory (current Directory) to retrieve information when, in order window MATLAB import order : behidden = myinhide (carry, x, y); carry using your camouflage vector file name instead, the format for*.* (take care not to lose a single quote) x, y election Hiding information
Platform: |
Size: 203776 |
Author: 韩飞 |
Hits:
Description: 本文结合DCT变换的特性，利用分形的Peano一hilbert扫描曲线，对基于DCT变换的图像编码方法进行了研究，并提出了改进方法。主要工作分为两个部分: 一是在分块DCT基础上的改进。对分块后生成的各图像块矩阵，不直接作二维DCT变换，而是先进行扫描，使之重排成一维向量，再进行一维DCT变换，这样可以减少运算量。 其次是对层次余弦变换编码部分的改进。使用层次DCT变换与零树编码相结合的方法，并在扫描编码过程中，按Peano一hilbert扫描顺序进行编码。这样不仅可以减少“块效应”，而且可以加快编码速度。-this paper the characteristics of DCT, using fractal Peano a Hilbert scanning curve, the DCT-based image coding method for the study and improvement of methods. The work is divided into two main parts : First, the DCT block on the basis of improvements. Right after block production of the image block matrix, not for direct two-dimensional DCT, but first scan, so they line up in a heavy-dimensional vector and then a peacekeeping DCT, thus reducing the amount of computation. Secondly, the level of cosine transform coding some of the improvements. The use level of DCT and zero tree coding combination of methods, coding and scanning process, according to a Hilbert Peano code scanning sequence. This will not only reduce the "blocking effect" but we can speed up the coding speed.
Platform: |
Size: 5011456 |
Author: lzy |
Hits:
Description: DCT变换的VC实现，对研究DCT如何用C实现有很大的参考作用，或可直接调用-DCT VC to study how to use C DCT achieve a great reference, or direct call
Platform: |
Size: 13312 |
Author: |
Hits:
Description: 在DSP上实现DCT的三角波，方波，正弦波的显示，一个好程序，全的-on DSP for DCT triangular wave, square wave, the sine wave, a good process, and all the
Platform: |
Size: 12288 |
Author: 朱岩 |
Hits:
Description: 一个简单的jpeg的编码器
它采用的离散余弦变换是ANN&SCALE DCT -a simple jpeg the encoder uses the discrete cosine transform DCT is ANNSCALE
Platform: |
Size: 11264 |
Author: 谢青青 |
Hits:
Description: aan fast dct algorithm-aan fast algorithm
Platform: |
Size: 4096 |
Author: 李恆寬 |
Hits:
Description: 这是一个非常有用的DCT变换的原代码，用c语言编写，希望对大家有帮助。-This is a very useful DCT's original code using the c language, and I hope to be helpful.
Platform: |
Size: 134144 |
Author: 何忠 |
Hits:
Description: 图像数字水印的方案毕业论文，基于dct和dwt的算法，有详细程序。-digital watermark image of the program thesis, based on Extra dwt and the algorithm, a detailed procedure.
Platform: |
Size: 1234944 |
Author: shen |
Hits:
Description: 这是一个二维 8*8块的离散余弦变换(DCT)以及反变换(IDCT)算法,采用VHDL实现-This is a two-dimensional 8* 8 discrete cosine transform (DCT) and inverse transform (IDCT) algorithms using VHDL realize
Platform: |
Size: 10240 |
Author: liujl |
Hits:
Description: 里面含有vhdl和verilog 版本,很好用!dct变换用得很多啊!-Which contains a VHDL and Verilog versions of very good use! Dct transform with a lot ah!
Platform: |
Size: 124928 |
Author: 萧勇 |
Hits:
Description: 用verilog语言实现DCT编解码
附有DCT的说明-Using Verilog language realize DCT codec with a description of DCT
Platform: |
Size: 65536 |
Author: 周韧研 |
Hits:
Description: 将一副256*256的灰度图像分成8*8的小图像块，然后进行dct变换-Will be a 256* 256 gray image is divided into 8* 8 small image blocks, and then proceed to DCT transform
Platform: |
Size: 389120 |
Author: 笨笨 |
Hits:
Description: 离散余弦变换，选择图像后选择功能项，会得到经过离散余弦变换后的图像-Discrete cosine transform, select after the selection of images, which will be after a discrete cosine transform image
Platform: |
Size: 1610752 |
Author: xinrui |
Hits:
Description: 一个有关DCT的matlab程序，采用分块的思路-DCT-a matlab program, the idea of using block
Platform: |
Size: 1024 |
Author: 吴杰 |
Hits:
« 12
3
4
5
6
7
8
9
10
...
43
»