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Description: DCT_2D Transform 2D DCT变换-DCT_2D Transform 2D DCT
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Author: 刘曦 |
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Description: 上传的是C编写的DCT算法，在图象处理方面常用到，希望对你有用-upload is prepared by the C DCT algorithm, the image processing used to the hope that useful to you
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Author: 廖和 |
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Description: 提出一种基于视觉特性的图像摘要算法，增大人眼敏感的频域系数在计算图像Hash时的权重，使得图像Hash更好地体现视觉特征，并提高鲁棒性。将原始图像的分块DCT系数乘以若干由密钥控制生成的伪随机矩阵，再对计算的结果进行基于分块的Watson人眼视觉特性处理，最后进行量化判决产生固定长度的图像Hash序列。本算法比未采用视觉特性的算法相比，提高了对JPEG压缩和高斯滤波的鲁棒性。图像摘要序列由密钥控制生成，具有安全性。-Based on the visual characteristics of the image digest algorithm, increasing the human eye-sensitive frequency-domain coefficients in the calculation of the image when the weight of Hash, Hash makes images better reflect the visual characteristics, and improve robustness. Will block the original image multiplied by the number of DCT coefficients generated by the key control of pseudo-random matrix, then the results of calculation based on the sub-block of Watson HVS treatment, and finally quantify the judgments arising from fixed-length sequence of images Hash . Than the algorithm did not use the visual characteristics of the algorithm, improve the JPEG compression and Gaussian filtering robustness. Abstract image sequence generated by the key control, with security.
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Size: 167936 |
Author: kurt |
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Description: 离散傅立叶变换，在数字图像的频域处理中经常使用的变换，源代码为VC6开发环境。-Discrete Fourier Transform in the frequency domain of digital image processing frequently used transform, the source code for VC6 development environment.
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Size: 150528 |
Author: bmws |
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Description: 快速的DCT 变化C++代码,可以看一下-DCT rapid changes in C++ Code, you can look at
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Size: 140288 |
Author: 张伟 |
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Description: 使用DCT算法实现8X8的BMP图像压缩的一个源代码，希望对大家有用~-8x8 algorithm using DCT image compression of BMP, a source code, in the hope that useful to everyone ~
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Size: 3072 |
Author: viconia |
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Description: dct.pdf中介绍的公式非常经典，但其中的一段源程序有一些错误，但在C文件dctmatrix.c有了修正。
dctmatrix.c给出了如何定标DCT系数。
dctmatrix.c中，FIX_DCTMTX_2[Rows][Columns]采用Q11定标,FIX_DCTMTX采用Q15定标。
DCTMTX_2[Rows][Columns]*2=DCTMTX[Rows][Columns]-dct.pdf formula described in a very classic, but a section of source code has some mistakes, but in C has been amended dctmatrix.c document. How dctmatrix.c given DCT coefficient calibration. dctmatrix.c in, FIX_DCTMTX_2 [Rows] [Columns] using Q11 calibration, FIX_DCTMTX calibration using Q15. DCTMTX_2 [Rows] [Columns]* 2 = DCTMTX [Rows] [Columns]
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Size: 91136 |
Author: haoding |
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Description: 基于DCT的水印技术的C程序实现，可在此示例的基础上修改，实现自己的数字水印系统-DCT-based watermark technology procedures C realize, in this example could be the basis of changes to realize their own digital watermarking system
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Size: 19456 |
Author: 鹿玉红 |
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Description: 实现图像压缩中的DCT变换，尤其是对于H.264视频标准中的DCT变换。-The realization of image compression in DCT transformation, especially for H.264 video standard DCT transform.
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Size: 2048 |
Author: 张小伟 |
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Description: ARM汇编，实现DCT算法，图像压缩，JPEG
需要loadmemory，里面附带load文件示例以及样子图片，raw格式-ARM compilation and realizing DCT algorithm, image compression, JPEG need loadmemory, incidental load inside sample documents, as well as look like picture, raw format
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Size: 10240 |
Author: 林锋 |
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Description: TI DSP 54x系列实现音频信号的DCT运算。在达盛科技的实验台上测试通过。有程序详细的注释。可作参考-Series TI DSP 54x audio signal to achieve the DCT computation. Sung in the technology of the experimental test platform. Notes the detailed procedures. For reference. .
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Size: 69632 |
Author: Chonggao Du |
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Description: 通过dct变换，来实现信息隐藏，把需要隐藏的图片嵌入到一副图片中。工具vc-Through dct transform, to achieve information hiding, the need to hide the picture embedded in a picture. Tools vc
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Size: 635904 |
Author: 陈平 |
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Description: 本论文首先系统地介绍了视频压缩编码的基本原理和方法，以及各国际标准
化组织提出的压缩标准；其次分析了JPEG和MPEG-4的主要技术，据此提出
MPEG-4简单框架编码器的软件实现方案，给出流程图，在VC++环境下用C语言
程序实现了JPEG压缩及MPEG-4简单框架的视频压缩功能，采用测试序列验证
无误，并对两种标准的压缩比进行试验对比，突出压缩的关键技术为DCT和运动
估计算法；接着深入研究了DCT变换、运动估计和补偿算法并进行了优化改进，
给出了用于快速匹配块的自适应十字模式搜索算法，并给出了对各种块匹配估计
算法的仿真结果。然后详细介绍了TI公司TMS320C6711DSP的软硬件特性，并
在此基础上提出系统的硬件实现方案。接着介绍了基于系统软硬件环境的移植问
题和优化方法，并针对算法移植和仿真过程中的问题进行了说明。
最后就课题设计过程中研究的结果予以总结，并阐述了以后课题研究的要点。-In this thesis,an introduction to video compression principal,methods and central
international video coding standards is done firstly.Then analyzing the core techniques
of JPEG and MPEG-4 and proposing a scheme of MPEG-4 SP encoder,the coding
function of JPEG and MPEG-4 is achieved in C successfully with test sequence Then
compare the compressed ratio of two standards,point out the key of compression is DCT
and Motion Estimation algorithm.Afterwards,studying the DCT/Motion
Estimation/Motion Compensation algorithm in detail and giving an adaptive rood
pattern search for fast Block-Matching motion estimation.Then the simulation of several
motion estimation algorithms based block-matching is given.Accordingly,a scheme of
a DSP-based video compression system is put forward,with the features of TI’s
TMS320C6711 DSP.At last,the transplant and optimization are considered on the basis
of soft and hard environments,also the simulation process.
In the end,the summarization about the
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Size: 1805312 |
Author: father2002 |
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Description: iscrete Cosine Tranform Implementation in C# (DCT of Image)
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Size: 31744 |
Author: alex |
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Description: 二维离散余弦变换 c# 实现图像压缩和特征提取
-Discrete Cosine Transform for Feature Extraction
Decription: Implementation of 2D discrete cosine transform in c#
Download source: http://www.codeproject.com/KB/GDI/2D-DCT.aspx
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Size: 29696 |
Author: ben |
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Description: 该程序代码中包含了DCT，FFT等算法的C程序实现方法，希望对大家有所帮助-The code contains the DCT, FFT algorithms in C programming design methods, we hope to help
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Size: 10240 |
Author: fc |
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Description: Discreat cosin transform for data transfermation in c Lamguage
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Size: 4096 |
Author: khanth |
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Description: DCT，C语言代码，移植性强，dct广泛应用与数字多媒体领域的信息嵌入，以及编码问题上-DCT, the C language code, portability, the DCT wide range of applications and digital multimedia information in the field of embedded and coding issues
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Size: 2048 |
Author: wg |
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Description: 在C++的编程环境下实现离散余弦变换，进行图像处理-In C++ programming environment to achieve discrete cosine transform for image processing
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Size: 1024 |
Author: 张博雅 |
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Description: 用C#语言编写的通过DCT变换实现图像压缩 数字图像处理实验报告-Written in c# by DCT transformation to realize image compression
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Size: 49152 |
Author: 徐立 |
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