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tBasedDDCTtheh
- 此源代码,是一个一种基于DCT的jpeg图像压缩编码算法的MATLLAB实现的程序源码，对做jpeg压缩的朋友会非常有帮助 -This source code is a one the MATLLAB jpeg images in the DCT-based compression algorithm to achieve the program source code and do jpeg compression friends would be very helpful
jpeg2bmp
- jpeg 解码的快速算法实现， 采用1d的dct实现2ddct-the jpeg decode fast algorithm using 1d the dct to achieve 2ddct
ASemi_Fragiler
- 基于DCT压缩前后不变量，编写的抗JPEG压缩的数字图像认证证水印算法，具有良好的抵抗压缩、剪切、篡改等性能的水印仿真程序 -Invariants based on before and after the DCT compression, digital image authentication certificate watermark algorithm written anti-JPEG compression with good resistance to compression,
jpegencoding
- 该文档详细描述了JPEG编码过程，涉及色系变换、DCT变换、量化、Huffman编码等关键步骤，适合JPEG编码入门学习。-The document is a detailed descr iption of the JPEG encoding process involves color transform, DCT transform, quantization and Huffman coding key steps, learning portal for JPEG encoding.
Image-processing-experiments
- 图像处理实验，灰度值变换，绘制直方图，图像分割，边缘检测，DCT FFT变换，JPEG编码-Image processing experiments, the gray value transformation, histograms, image segmentation, edge detection, DCT FFT transform, JPEG encoding
Image-Compression
- 图像压缩实验，实现基本JPEG的压缩和编码的三个步骤，DCT变换去除数据冗余，DCT系数进行量化，对量化后的系数进行Huffman编码-Image compression experiments, the three steps of the basic JPEG compression and encoding, DCT transform to remove data redundancy, and the DCT coefficient quantization, Huffman codi
openjpeg-2.0.0-win32-x86
- JPEG 2000 encoding and decoding, DCT, quantization, encoding entropic, huffman, arithmetique, wavelets coefficients
jpegcodec
- jpeg coder and decoder with out using block proc function.Reading the image into 8x8 blocks and apllied the DCT transform and quantization using quantization tables.After that seperation of DC and AC coefficients and I applied the DPCM for DC coeffci
A-Watermarking-Algorithm(MATLAB)--
- 盲水印提取时不需要参考原始载体图像,在信息隐藏、版权保护等方面具有更广泛的应用前景。提出的盲水印算法在分块离散余弦变换(DCT)和离散小波变换(DWT)的基础上,利用关系双方DCT系数和DWT系数在受到攻击时具有相同变化趋势的特点,采用关系嵌入和量化嵌入的自适应选择嵌入策略,较大幅度地提高了盲水印提取的鲁棒性。同时在量化嵌入中采用抖动调制,实现了水印透明性和鲁棒性调节的便捷性。大量仿真实验结果表明该算法对噪声干扰、低通滤波、JPEG压缩、对比度增强等攻击有很好的鲁棒性和透明性。关键词 数字水印盲
JPEG_BaseLine_Encoder
- The JPEG compression scheme is divided into the following stages: 1. Transform the image into an optimal color space. 2. Adjust Aspect Ratio 16:9 3. Digitization Scheme 4:2:0. 4. Apply a Discrete Cosine Transform (DCT) to blocks of pixels
DM6446JPEG-encode
- 一个原始图像信息，要对其进行 JPEG 编码，过程分两大步： i) 去除视觉上的多余信息，即空间冗余度 ii)去除数据本身的多余信息，即结构（静态）冗余度 JPEG 编码中主要涉及到的内容主要包括： i) Color Model Conversion (色彩模型) ii) DCT (Discrete Cosine Transform 离散余弦变换) iii)重排列 DCT 结果 iv) 量化 v) RLE 编码 vi) 范式 Huffman 编码 v
dctfenjie
- 包括基于JPEG的DCT下的分块和步骤详述了编码过程，思路清晰-Including those based on the JPEG DCT block and step under the detailed coding process, clear thinking
AC_Huffman
- 关于JPEG环境下的DCT变换下的AC系数编码中的各种详细思路和代码-JPEG environment on the AC DCT transform coefficients encoded in a variety of detailed ideas and code
DigitalVideo
- 完成bmp文件到jpeg文件的压缩，使用DCT变换然后进行游程编码以及哈弗曼编码 实现完整的jpeg压缩过程，最后写成jpeg文件-Bmp files to jpeg complete file compression
anti_JPEG_watermark
- 本程序为抗JPEG压缩的半脆弱性彩色图像数字水印，主要原理为DCT转换和DCT系数比较法，内含5中攻击仿真测试以及GUI界面，测试环境为MATLAB2009a，系本人2013年本科毕业设计-The procedures for the anti-JPEG compression semi-fragile color image watermarking, the main principle is the DCT transform and DCT coefficients comparativ
dct2d
- this program is written in verilog compute the dct transform of an image used for jpeg and other image compression methods-this program is written in verilog compute the dct transform of an image used for jpeg and other image compression methods
JSteg
- JSteg隐写技术matlab实现代码--基本思想：用秘密信息比特直接替换JPEG图像中量化后DCT系数的最低比特位，但若量化后DCT系数为0或者1，则不进行处理。（DCT系数的LSB嵌入） -JSteg steganography matlab code- the basic idea: direct replacement with the secret information bits JPEG image quantized DCT coefficients in the leas
JPEGcoding
- JPEG压缩编码，将输入的BMP图像进行DCT变换、霍夫曼编码后输出码流。-JPEG compression coding, the input BMP image DCT, Huffman encoded output stream.
BmpToJpgJpgToBmp
- 实现jpeg压缩和解压缩,将彩色图像进行颜色空间转换、对不同的颜色分量进行不同的采样、对于3个分量进行8×8的DCT变换、对DCT系数矩阵按照JPEG推荐的量化表进行量化；对量化后的系数进行Z形扫描，最后进行熵编码，形成码流，计算比特数，和压缩比。解压从量化后的DCT系数表开始逆向进行-Jpeg compression and decompression, the color image is a color space conversion, the different color compo
dct8x8
- 全流水线1维8点DCT变换，用于JPEG编码，无乘法运算,verilog-Full-line one-dimensional 8-point DCT, for JPEG encoding, no multiplication