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Description: VC＋＋下面的JPEG压缩编码例程，包括DCT，Z字变换等操作-below VC++ JPEG compression routines, including DCT, Z characters transform such an operation
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Size: 53248 |
Author: 余飞 |
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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.
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Size: 5011456 |
Author: lzy |
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Description: 这是一个基于DCT的jpeg图像压缩编码算法的MATLAB实现的程序,对做jpeg压缩的朋友会很有帮助-this is matlab jpeg compression based on dct,it is helpful for who embark on jpeg compression.
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Size: 40960 |
Author: 杨晖 |
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Description: 对原始灰度图像 Lena_gray.bmp进行图像压缩实验
1．对此图进行 8×8 DCT 变换后，分别只保留 DC系数，以及保留前 4、8、16 个变换系数(DC＋AC) ，然后再分别进行 IDCT 变换，比较结果。
2．可以使用 Matlab - Image Processing Toolbox 中的函数实现。
-gray image of the original image compression Lena_gray.bmp an experiment. This diagram 8 8 DCT, the only difference reservations DC coefficient, and the preservation of the former 4, 8 or 16 DCT coefficients (DC+ AC), and then separately IDCT transformation, the results of the comparison. 2. Using Matlab-Image Processing Toolbox to achieve the function.
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Size: 1024 |
Author: 朱晓路 |
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Description: 这是使用小波变换,jpeg以及DCT变换对图像进行的压缩
-This is the use of wavelet transform, and the DCT jpeg images of the compression
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Size: 563200 |
Author: yangfeng |
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Description: 这是四维DCT变换的代码，对DCT压缩变换感兴趣的人可以将此作为参考，个人认为非常好。-This is the four-dimensional DCT code, the DCT compression for interested persons can be used as a reference. personal view is very good.
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Size: 4096 |
Author: 成功 |
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Description: JPEG压缩核心变换DCT实现源码，用matlab7.0实现-JPEG compression core transform DCT achieve source used to achieve matlab7.0
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Size: 1024 |
Author: song |
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Description: 关于图像DCT压缩编码解码的MATLAB程序，适合初学者。希望对大家有用！-on DCT compression codec MATLAB procedures for beginners. We hope that the right useful!
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Size: 257024 |
Author: 宋亮 |
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Description: 图像压缩用的DCT变换，相信对你一定很有用的。-image compression with the DCT, I believe you will very useful.
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Size: 1003520 |
Author: yuezhichn |
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Description: 是进行JPEG图形压缩算法的代码，对图形进行DCT变换-is JPEG image compression algorithm code, the graphics DCT
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Size: 2144256 |
Author: chenji |
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Description: 主要介绍了dct压缩解压，matlat源代码，很有参考价值-Mainly introduce the DCT compression decompression, matlat source code, useful reference
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Size: 1024 |
Author: 韩建伟 |
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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: 利用离散余弦变换来对图像进行压缩的vc++程序源代码-Use of discrete cosine transform to image compression vc++ Source code
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Size: 3052544 |
Author: 飞飞 |
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Description: 利用DCT变化对tif图像进行压缩利用DCT变换进行图像压缩的MATLAB程序-Changes in the use of DCT compression of tif images using DCT transform image compression MATLAB program
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Size: 802816 |
Author: ruiomar |
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Description: 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。）-The use of DCT for image compression
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Size: 218112 |
Author: nn |
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Description: 对JPEG的压缩标准进行了仿真，主要过程DCT压缩，根据JPEG的量化矩阵对DCT结果进行量化，对量化结果进行Huffman编码。同时也实现了解压缩过程，即执行上述过程的逆过程。-JPEG compression standard of the simulation, the main process of DCT compression, according to the JPEG quantization matrix to quantify the results of the DCT, to quantify the results of Huffman coding. At the same time compression process to achieve understanding, that is, the inverse process of the implementation of the process.
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Size: 5120 |
Author: Justin |
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Description: 2D-DCT 压缩图像后，通过QPSK,AWGN信道编码传输后，IDCT解压缩回原始图像，适用于任何图像-Using DCT to compress the orginal image, I use zigzag program, quantization, dct compression, then change the vector to bineary bit to pass through the QPSK channel. And from the binary array, I use IDCT to reconstructe the orignial image. working perfectly.
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Size: 4036608 |
Author: Jackie |
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Description: a very good survey on DCT compression
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Size: 537600 |
Author: Zahra |
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Description: 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
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Size: 156672 |
Author: zjj |
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Description: DCT压缩程序，此程序也是找来的，也许对大家有用，学习之用-DCT compression programs, this program is to find, may be useful to everyone, the use of learning
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Size: 1024 |
Author: huojiangchen |
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