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图象处理2
- 图像隐藏和数字水印。采用在空域隐藏，在每个象素的bit位的低位藏入图片。采用在DCT系数上附加信息的方法进行。-image hiding and digital watermarking. Hidden in the airspace used in each pixel of the low bit-into the possession of photographs. Using the DCT coefficient Additional information on the method
watermark的DCT代码2
- 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.
jpeg2avihojoon
- This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN -
jpeg_encode+decoderhojoon
- This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN -
rgbquadtreehojoon
- This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN -
dct
- M=512 原图像长度 N=64 K=8 I=zeros(M,M) J=zeros(N,N) BLOCK=zeros(K,K) 显示原图像 I=imread( f:\ceshi\yuanshitu.bmp ) figure imshow(I) xlabel( 原始图像 ) 显示水印图像 J=imread( f:\ceshi\logistic_nuaa64.bmp ) figure imshow(J) xlabel(
DCT-for-image-compression-
- 利用DCT进行图像压缩（首先将图像分割成8×8的图像，对每个子图像进行DCT，这样每个子图像有64个系数，舍去50％小的变换系数，进行2：1的压缩。）-Using DCT for image compression (first image into 8 × 8 image, for each sub-image DCT, so that each sub-image by a factor of 64, rounding 50 of the small transform coefficie
DCT-11-(2)
- DCT 音频水印 嵌入与提取 并进行攻击 -DCT SHUIYIN CHENGXU
tuxiangyasuo
- （1）试利用函数dct2，对该图像进行压缩。压缩时可尝试对DCT 变换后的系数采用不同取舍方法，比较其压缩性能。（函数dct2在matlab本身是有的，可以help dct2看看） （2）结合课本例8.7.2 的量化方法，对每一个经DCT变换后的8×8 矩阵量化（Huffman编码部分可省略），从而实现图像压缩。在一定压缩比的情况下，和⑴给出的图像质量相比较。 （3）用所给的子子程序fast_LOT.m 实现对该图像的变换与压缩，并和（1）得出的图像质量相比较-(1) Test usin
DCT-a-Hamming-coding
- 1.DCT变换，对整个图像的直接DCT变换和分块为8*8做DCT变换，并设定阈值。 2.汉明编码（7，4），译码以及找出错误图样和纠错。并在不同的转移概率的BSC道下进行传输。-DCT:Direct DCT and IDCT,blocking. hamming coding:decoding and picking up errors.
DCT中值均值
- 1）图像平滑算法程序设计： 2）DCT压缩（保留不同系数），要求显示原图像、压缩后图像的文件大小、压缩比或算术编码压缩
matlab
- 基于DCT数字水印算法的Matlab实现源代码,1. 将文字水印和图像水印转换为二值序列水印； 2. 对水印进行置乱，提高其安全性； 3. 选择合适大小的块，给出DCT域中频分块编码方案；-DCT-based digital watermarking algorithm Matlab source code, a text watermark and image watermark converted into a binary sequence watermark .. 2 wa
DCT
- 1、针对图像，按8*8块，进行DCT，对比不同有效系数（1、3、10、36）下重建质量，给出有效系数下的MSE误差曲线； 2、给出对应的基图像（64个8*8图像）。-Compare the quality of different effective reconstruction coefficient (1,3,10,36), the MSE error curve is given under the effective coefficient 2, to give
progams_matlab_dip
- 1.Perform colour image segmentation and pseudo coloring on gray image 2.Import two images and perform Image Addition, subtraction,Image multiplication,division,blending 3.To perform logical and morphological operations 4.To perform DCT and quan
digital-signal-processing
- 实现一个数字信号处理的仿真系统 。要求具有界面并实现以下功能： 1）能产生（得到）并选择各种数字信号（sin、方波、三角波、语音、噪声及其叠加）； 2）具有DFT、DCT和小波变换和经典功率谱估计功能； 3）具有设计IIR和FIR低通、高通、带通滤波器功能； 4）能显示时域和频域波形，演示输入信号经过系统得到输出信号过程及频域特性和时间序列。 -Implement a simulation system of digital signal processing. It