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JPEGcompression.rar
- 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。 具体源程序由主程序及两个子程序（DCT量化、Huffman编码）组成： ,1. First of all, through the DCT transform to remove data redundancy 2. The use of quantization table of quantization DCT coefficients 3. Of quanti
dct.rar
- 已知两个不同图像块亮度数据如下： （1）分析DCT原理，采用DCT方法，编程并计算相应的DCT系数，分析系数分布特点。 （2）依据视觉特性分析量化表步长的分布特点，完成DCT系数量化。 （3）采用Z形扫描，实现输出数据的统计编码，形成Video stream。 （4）采用IDCT重建图像亮度数据，计算SAD大小，分析产生误差的原因及采用DCT进行数据压缩的原理。（ ） （5）分别利用左上角1、3、6个系数重建图像，计算相应的SAD，并由
signal-analysis
- dctcom.m文件利用DCT变换完成对输入图像进行压缩；imagecbe.m完成对输入的两幅RGB图像用小波分析的方法进行图像融合 imagecom.m完成对输入的RGB图像用小波分析的方法进行自动降噪，得到高频系数阈值，降噪效果百分比和结果 wavelet1D.m完成对输入的一维信号进行多尺度离散小波分解 wavelet2D完成对输入的二维信号进行多尺度离散小波分解；zigzag.m完成对输入的8*8矩阵按照zigzag排列抽取数据.-document the use of DCT tran
water
- 基于dct变换的数字水印 matlab源码及测试用数据-Based on the DCT Transform Digital Watermarking matlab source code and test data
FaceRecognition
- 这是一个用matlab做的人脸识别系统，里面包含了几十张人脸数据图像，值得一荐-This is a matlab to do with Face Recognition System, which contains dozens of Zhang Face image data, it is worth sacral
DCT
- Discrete cosine transform to compress data.
dct
- 针对给定的静止图像进行DCT 变换 给定不同的阈值及将数据块中不同位置的值置为0所得到的不同情况下压缩-For a given static image DCT transform a given threshold and a different data block at different positions of a value of 0 has been compressed under different circumstances
dct
- JPEG压缩算法的核心是“视觉保真”原理，利用人类视觉系统特征进行处理，以达到最大图像数据压缩效果，实际上就是去除那些人眼不易觉察的信息。图像的空间频率对人的视觉至关重要，采用离散余弦变换可将图像分解成一组波，每个波有一个不同的空间频率，这样可以去除人类眼睛觉察不到的信息，而且还可使系统只保留重要的信息。-JPEG compression algorithm is the core of " visual fidelity" principle, the use of the
dwprotected
- Matlab source code for DCT-based watermarking for grayscale images. DCT-based watermark recovering without resorting to the uncorrupted original image. Digital watermarking has been proposed as a viable solution to the need of copyright protection an
H264-DCT-Quanter
- H264中的整数DCT变换编码及量化代码,并附有原文的DCT编码、量化的说明文档。本源码从X264及JM中抽取后整理得来，并用原文档中的示例数据进行了测试，与原文档结果完全一样，是学习H.264不可多得的参考资源. -H264 in the integer DCT transform coding and quantization code, together with the original DCT coding, quantitative descr iption of the doc
WatermarkingofImagesandVideo
- Very thorough discussion of Data Hiding / Steganography / Watermarking of video with DCT-Very thorough discussion of Data Hiding/Steganography/Watermarking of video with DCT
ImageFreqCipher
- 一种频域加密算法，图像经过DCT变换得到DCT系数，然后对DCT系数进行加密。然后对加密的DCT系数进行DCT反变换图像数据。最后对其加密后的图像数据进行线性变换来调整图像数据的取值范围在[0，255]。最后得到加密图像-A frequency-domain encryption algorithm, the image obtained through the DCT transform DCT coefficients, and then encrypt the DCT coefficien
hw2
- 1.对一个256*256的图像进行DCT变换得到图像D，将D得斜下角数值置为零，然后进行DCT反变换. 2.对源图像进行K-L转换 1和2比较-1.Get a grey level image which size is N*N. (For example, 256*256, however, N = ), and partition to 8*8 sub images. 2.. Apply DCT to these sub images, and get the transfo
DiscreteCosineTransform
- DCT A discrete cosine transform (DCT) expresses a sequence of finitely many data points in terms of a sum of cosine functions oscillating at different frequencies. DCTs are important to numerous applications in science and engineering, from lossy com
DCT_based_Data_hiding
- DCT-based Data hiding: dataHide.m Hide the logo image into the original dataExtract.m Extract the logo image from the original findData.m Verify the robustness of the data hiding method 。and use jpeg compress -DCT-based Data hiding: dataHide.m H
jpegc
- 本文档实现了JPEG压缩算法，字组织比较简陋, 大体上分成 3 个部分. 压缩算法简介 1. 色彩模型 2. DCT (离散余弦变换) 3. 重排列 DCT 结果 4. 量化 5. 0 RLE 编码 6. 范式 Huffman 编码 7. DC 的编码 解码过程简述 8. 一个数据单元 Y 的解码 9. JPG 文件(Byte 级)里怎样组织图片信息 10. 关于标记 11. JPG 文件中 Haffman 表的储存
an_intellegent_audio_water_marking_based_on_dwt-s
- All three, Discrete Wavelet Transform (DWT) - Singular Value Decomposition (SVD) and Adaptive Tabu Search (ATS) have been used as mathematical tools for embedding data into an audio signal. In this paper, we present a new robust audio waterma
dct
- bmp DCT 压缩 对原图像进行DCT变换，数据压缩，丢弃右下角高频数据，进行DCT反变换，得到压缩后的图像-bmp DCT compression of the original image DCT transform, data compression, discarding the lower right corner frequency data, DCT inverse transform, the images are compressed
dct
- all ok...4 Dec 2009 ... In this method the 2-Dimensional DCT is obtained by taking two ... column-wise 1D DCT is ascertained which gives the 2D DCT of the data. ... The design is done in Verilog HDL and the simulation is done in Modelsim 6.3b.
dct
- 通用数据库格式转换工具dct 支持Oracle,SQL Sever,Access,Excel等数据库之间数据格式批量转换:即Oracle转SQL Server；SQL Server转Oracle；Oracle转Access；Access转Oracle；SQL Server转Access, Access转SQL Server等,支持Oracle,SQL Sever,Access导出Excel。-Dct common database format conversion tool support