本文介绍了图像压缩的原因及数字图像压缩编码。
The paper introduces the reason of image compression and digital image compression and coding.
验证结果表明，基于PD VQ的数字图像压缩系统具有可靠性和实用性。
The verification results illustrate that digital image compression system based on PDVQ has dependability and practicality.
阐述了多媒体应用中的关键技术——数字图像压缩技术，及有关压缩的国际标准和芯片。
The digital image compression technology, the key technology in the multimedia applications, the international standards and chips about compression are illustrated in this paper.
在数字图像压缩领域，国际标准化组织于1992年推出的JPEG标准应用最为广泛。
Till now, JPEG compression standard is more widely used since it's released by ISO/ITU in 1992.
数字图像压缩编码的目的就是要以尽可能少的比特数来表征图像，同时又必须保持恢复图像的质量。
The purpose of digital image compress coding is to token the image within the limit of bit, and to maintain the quality of renew image.
本文首先对数字图像压缩的必要性和可行性进行了分析，并对传统压缩编码方法进行了比较和综述。
This paper analyzes the necessity and feasibility for images compression at first, and then makes a comparison and summarization for the traditional compression methods.
近年来，电子器件和设备的处理能力和处理速度大幅提高，使得数字图像压缩技术不断进步，应用广泛。
In recent years, processing capacity and speed of electronics device is increased more and more. It makes the digital image technique progress constantly and it is applied widely.
数字图像压缩技术和数字图像加密技术应运而生，并且被广泛应用到多媒体、通讯、医学等等各个领域。
So the digital image compression technology and the digital image encryption technology have been born and applied in many field, such as multimedia, communication, medicine and so on.
本文首先给出了基于PD VQ的数字图像压缩系统的系统方案，然后介绍了系统的硬件结构设计、FPGA逻辑实现以及图像处理算法的FPGA实现。
Firstly, the thesis presents the system scheme of digital image compression based on PDVQ. Then we introduce the hardware design, FPGA logic realizing and FPGA implement of image processing algorithm.
基于边缘模型重建的数字图像后处理算法可以改善高倍压缩图像的主观和客观质量。
The subjective and objective quality of decompressed images can be improved by digital image post-processing algorithms of model-based edge.
系统使用CCD获取原始数字图像数据，采用快速算法实现了核心的二维DCT变换，经过编码后，在一个16位定点DSP上实现了快速图像压缩。
The system uses CCD for getting digital image, uses a 16 bit fix-point DSP to perform fast discret cosine transform(DCT) arithmetic and image encoding and realizes a fast image compression in end.
实验结果是在某一距离以内，压缩的数字图像信号经过低压电力线路传输后质量得到保持，具有较高的清晰度和自然度。
The testing results show that compressed digital images transmitted over low-voltage power lines maintain good quality which has high clarity and naturalness within a certain distant.
OCT图像通过数字化压缩分割成为便于计算机处理的OCT数字图像。
OCT image is digitalized, compressed and converted into OCT digital image that is more convenient for computer processing.
图像视频压缩所解决的问题是尽量减少表示数字图像时所需的数据量。
What the image video compression solves is reducing the data amount as possible while showing digital images.
图像数据压缩是数字图像处理技术所研究的主要内容，它在图像存储和图像传输方面有着非常重要的地位。
Image compression is the main content of digital image processing technology, and it is vital to image storage and transmission.
图像压缩是数字图像处理中最重要的关键技术之一，传统的图像压缩方法有预测编码、变换编码和矢量量化等。
Image compression is one of the most important key techniques in image processing. Traditional compression methods include prediction coding, transform coding and vector quantization (VQ).
原始的数字图像需要大量的存储空间，而直接对其进行压缩编码效果并不理想。
Saving original image data needs a lot of memory space, and direct compression doesn't get a good effect.
由于数字图像具有数据量大的特点，出于对图像存储成本和图像通信的考虑，良好的图像压缩技术要能够实现高压缩率和高保真率。
The digital image has huge data information, so the algorithm which has high compression ratio and high fidelity rate is urgently needed, taking account of storage cost and communication.
论述了数字图像处理的方法，以及视频压缩的必要性，压缩原理等。
Discuss digital image processing, necessary of video compressing and principle of video compressing.
数字图像的压缩编码技术已经成为过去十几年来的重要研究课题。
Technologies for digital image compression have been the subject of much study over the past decade.
采用NLEMD算法进行图像分解，并基于当前普遍使用的JPEG图像压缩标准提出了数字图像分层压缩的算法。
This paper adopts NLEMD to decompose images, and, at the same time, proposes a new multi-layered image compressing approach based on JPEG which is the most popular image compression standard.
数字图像处理的相关知识，包括图像的采集、表示、编码压缩、图像处理和图像分析等。
Relevant knowledge of digital pattern process, collection, showing of including the picture, the code is compressed, pattern process and picture are analysed etc.
数字图像处理的相关知识，包括图像的采集、表示、编码压缩、图像处理和图像分析等。
Relevant knowledge of digital pattern process, collection, showing of including the picture, the code is compressed, pattern process and picture are analysed etc.
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