图像压缩

The experiments show that the algorithm can assure good imperceptibility for watermarked image and the watermark embedded using the algorithm has good fragility against the attacks such as JPEG compression, image shearing and transforming, and beseem to region and integrality authentication for image.

实验表明：该方法嵌入的水印不可见性好，对JPEG压缩、图像剪切和图像变换等处理具有很好的易碎性，适合于图像的区域认证和完整性验证。

This paper presents a new method for color image compression coding by using chromatism analysis and wavelet transform. In the method ,one of the three color components of a color image for example the G (component of a RGB color image is coded using wavelet transform ,and the chromatism between G and other two color componets RG, BG is coded respectively using chromatism analysis.

提出一种应用色差分析和小波变换对彩色图像进行压缩编码的新方法，该法是对彩色图像的三个色彩分量之一，如RGB图像的G进行小波变换编码，而对G与另外两个色彩分量的差值（RG和BG进行色差分析编码。

The algorithm performs discrete cosine transform on sub image of host image, which is cover by visible watermarking, and compresses sub image by select the set of visually important DCT coefficients. Then, the algorithm hides the compressed sub image, which is encrypted by the hash function that is constructed by Rijndael code, in the high coefficient of wavelet domain.

算法将水印图像与宿主图像进行融合，并对隐藏子图采用DCT变换，按Zig_Zag排序保留视觉重要DCT系数的方法作压缩处理，并利用Rijndael密码构造单向Hash函数作加密处理，最终分散嵌入到宿主图像的带参数的整数小波域中的高频系数，实现了可见水印的有效嵌入。

The design of a high resolution digital surveillance system is built, and the key techniques involved and implemented way are discussed.

基于JPEG2000图像编解码芯片（型号：THUJ2K01），设计了包括图像采集、压缩、传输、存储显示及系统控制的高清晰数字图像监控系统，并就涉及的关键技术和实现方法进行了讨论。

In the paper,a fast image retrieval method based on the DCT domain and correlative feedback is presented,which aims at JPEG images and uses color layout descriptors in the MPEG7 standard. As the method only needs entropy decoding,the speed of extracting image features is improved and storage space saved. The experiment result shows that the method has a high retrieval speed and a good effect.

文章针对JPEG压缩图像，结合MPEG 7中建议的颜色布局描述符，提出一种带相关反馈的基于DCT域的快速图像检索方法；该方法只需要熵解码，可提高图像特征提取的速度、节省存储空间；实验结果表明，此方法具有检索效率高、检索效果好的特点。

In this paper, we have done some work on lossless hyperspectral images compression as follows: First of all, we analyze the characteristic of hyperspectral images, and compare it with common images.

本文主要关注于高光谱图像的无损压缩，所做的工作如下：首先分析了高光谱遥感图像的特性，将它和普通图像进行比较。

It is a great challenge for military image communication technology to preserve the auto target recognition performance in the process of lossy image compression.

如何在图像有损压缩过程中保持图像的自动目标识别性能，是军事图像通信领域面临的重要挑战。

In the development of SRFM, through such image processing techniques as linear hue transformation, image liminal division and eliminating noises by adjacent field averaging and such data processing method as high speed data compression as well as arranging the procedure of eliminating noises after image division, the precision and performance of responding in real time are guaranteed.

在系统的研制中，通过综合运用线性灰度变换、图像阈值分割以及邻域平均法滤波等多种图像处理技术和高速数据压缩等数据处理算法，并采用了将滤波环节放在图像分割之后进行的图像处理顺序，保证了系统剔除的准确性和实时性。

ACDZip is a zipping and unzipping program that gives you the power to compress image, audio, video and document files.

acdzip 是一个压缩及解压缩程序，让您的权力，来压缩图像，音频，视频及文件档案。

Thirdly, it introduces the theory of the imagesegmentation and frequent segmentation technique. The aim of the imagesegmentation is to mark off the interested region of the image, which is done to thecorresponding image processing to reduce the operation time and save the storagespace. At last, it mostly introduces the compress technique based on the wedgelet, andcompares the CART model which is introduced by Donoho and the improved modelby Romberg et.al. with the model of the article, then compares the image ofprocessing based on the three methods.

然后，介绍了图像分割理论和常用的分割技术，图像分割的目的是划分出感兴趣的图像区域，进行相应的图像处理，减少运算时间和节省存储空间；最后，主要介绍了基于伸长小波压缩的技术，将目前主要的算法----Donoho提出的CART模型和Romberg等人基于此的改进模型，与本文所提出的算法模型进行了比较，并对三种方法处理的效果图作了详细的比较。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。