Search - Image Compression DCT

Search - Image Compression DCT - List

[GIS program] 基于DCT变换的图像编码方法研究 DL : 0: 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.
Update : 2025-03-07 Size : 4.78mb Publisher : lzy
[Special Effects] 图像dct变换的程序 DL : 0: 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.
Update : 2025-03-07 Size : 1kb Publisher : 朱晓路
[CSharp] ml DL : 0: 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
Update : 2025-03-07 Size : 2.04mb Publisher : chenji
[Streaming Mpeg4] fdct DL : 0: 图像压缩中的快速DCT变换及其反变换的原理与实现-Fast image compression DCT transform and its inverse transform and realization of the principle
Update : 2025-03-07 Size : 82kb Publisher : W.Huayi
[OpenGL program] DCT DL : 0: 用Verilog HDL编写的离散余弦变换，可用于视频图像压缩，并在modelsim SE6.0中仿真通过-Verilog HDL prepared with discrete cosine transform can be used for video image compression, and modelsim SE6.0 simulation through
Update : 2025-03-07 Size : 1kb Publisher : yangyanwen
[Compress-Decompress algrithms] DCT DL : 0: 图片压缩代码，适用于DCT JPEG图片压缩。-Image compression code, applicable to DCT JPEG image compression.
Update : 2025-03-07 Size : 1kb Publisher : liyigang
[Compress-Decompress algrithms] xiao DL : 0: 简单的DCT的MATLAB图象压缩实验，适用于初学者-Simple DCT image compression experiment of MATLAB for beginners
Update : 2025-03-07 Size : 1kb Publisher : cat
[Special Effects] test DL : 0: 是毕业设计的课题，用matlab的图像压缩dct和dwt。-Is the subject of graduation design, image compression using matlab DCT and dwt.
Update : 2025-03-07 Size : 8kb Publisher : 雷
[GDI-Bitmap] dct DL : 0: 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
Update : 2025-03-07 Size : 784kb Publisher : ruiomar
[Other] Image_Compression_using_DCT DL : 1: Image compression using DCT
Update : 2025-03-07 Size : 47kb Publisher : Varun
[Graph program] JPEGCOMPRESS DL : 1: 这是一个基于DCT的图像JPEG压缩程序，并将压缩码保存在一TXT文本中-This is a DCT-based JPEG image compression process, and code stored in a compressed text in TXT
Update : 2025-03-07 Size : 58kb Publisher : yang
[matlab] dct-fft DL : 0: This the Discrete cosine tranform matlad code which is useful for image compression and also it show-This is the Discrete cosine tranform matlad code which is useful for image compression and also it show
Update : 2025-03-07 Size : 1.05mb Publisher : sunil
[Software Engineering] dct DL : 0: a dct code i tried.. the image compression using dct divides the image into various blocks n the performs the dct code on it -a dct code i tried.. the image compression using dct divides the image into various blocks n the performs the dct code on it ..
Update : 2025-03-07 Size : 1kb Publisher : anup
[matlab] dctcompr DL : 0: 基于DCT变换的图像压缩，分别给出了灰度图和真彩图的压缩方法。-DCT-based image compression, respectively, are given grayscale and true color pictures of the compression method.
Update : 2025-03-07 Size : 1kb Publisher : 秦关
[matlab] DCT DL : 0: 将图象分块(8*8)，作DCT变换，并作IDCT：DCT是一种可分离图象变换，用来图象压缩编码，IDCT用来解压缩。-The image sub-block (8* 8) for the DCT transform, and to make IDCT: DCT is a separable image transformations, is used to image compression coding, IDCT is used to decompress.
Update : 2025-03-07 Size : 7kb Publisher : zy
[matlab] DCT DL : 0: 基于Matlab GUI的图像的DCT，自由调节压缩率，计算峰值信噪比，并图形化对比还原图像-Matlab GUI for image-based DCT, freely adjust compression rates, the peak signal to noise ratio, and reduction of image contrast graphic
Update : 2025-03-07 Size : 200kb Publisher : 桂树
[2D Graphic] 12-19-3Image-Compression DL : 0: 利用DCT变换和哈德曼编码实现对彩色位图的压缩，并可求得图像压缩前后的差值。-Use DCT transform and Hardman Coding compression of color bitmap, and the difference obtained before and after image compression.
Update : 2025-03-07 Size : 7.78mb Publisher : lu
[Special Effects] image-compression DL : 0: 使用分块DCT变换实现图像的压缩编码和解码。-Using the block DCT transform image compression coding and decoding.
Update : 2025-03-07 Size : 981kb Publisher : wangyanan
[File Format] image-compression-DCT DL : 0: This fils contains a matlab code for image compression with DCT
Update : 2025-03-07 Size : 22kb Publisher : wafa derouaz
[Special Effects] Image Compression with DCT DL : 0: 基于DCT的图像压缩的简单例子，方便新手学习。(DCT based image compression simple example, easy for beginners to learn.)
Update : 2025-03-07 Size : 235kb Publisher : 郑景仁

« 12 3 4 5 6 7 8 9 10 ... 23 »