This method compresses chinese font with three steps : stroke extraction , stroke outline clustering and character shape rebuilding 这样结构式压缩方法通过对现有轮廓字形进行笔划轮廓抽取、笔划轮廓聚类和字形重建制作结构式的压缩字形。
Based on it in my thesis i have done a serial of research work on the fractal moving image compression and achieved some results 本文就是在此基础上对分形运动图像(视频)压缩方法进行了一系列的研究工作，并取得一些成果，具体工作如下： 1
In past twenty years , modern techniques based on neural networks , fractal theory and wavelet transform have been successfully used to image compression 近二十年来，基于神经网络、分形理论、小波变换的现代压缩方法已成功地用于图像压缩。
Chapter two introduces some important coding standards of video , especially analyzes the video format and compression method of mpeg - 1 第二章总结分析了常用视频编码，研究了目前广泛采用的mpeg - 1的视频压缩编码的格式以及采用的具体压缩方法。
3 . unsteady incompressible euler and navier - stokes equations are solved for two dimensional low - speed flows by the method of pseudo compressibility 推导了拟压缩方法二维非定常不可压euler n - s方程，编写了二维非定常euler n - s方程计算程序。
For signal processing , this paper offers a technique which is used to compress the data of ecg . two methods are included : one is wavelet , the other is wavelet packet 该技术包含两种方法：一种是小波变换压缩方法，另一种是小波包变换压缩方法。
Unfortunately , in these situations , the notorious blocking artifacts resulting from block dct set a severe limit on the achievable bit - rate with acceptable quality 然而,基于dct的传统视频压缩方法由于在低比特率下出现块失真严重影响恢复视频质量。
It has received much attention from the research community due to it ' s desirable properties such as new theoretical background , resolution independence and fast decoding 分形图象压缩是目前研究较广泛的图象压缩方法之一。它以理论新颖，解码快捷而倍受关注。
A new idea about video coding is proposed in this paper . it can not only increases the compression ratio , but also quicken the retrieval of multimedia data 本文提出了一种新的压缩方法，利用对i帧图像的压缩，在提高压缩率的同时，希望能加快对多媒体数据的检索。
But most wavelet based compression methods are of large amount of computation and cost space several times of other traditional methods , which is impossible in some poor conditions 但是,基于小波的压缩方法大多计算量高、存储需求大,很难满足低存储容量或低复杂度要求的场合。
