图像载体

针对图像载体，着重研究了空域（奇异值分解）和变换域（DCT）基于系数关系的的半脆弱数字水印技术，在此运用大量试验和评价参数分析算法有效性，从而有效抵抗恶意篡改。

With the image carrier , focused on airspace ( SVD ) and transform domain ( DCT ) coefficients based on the relationship between the semi-fragile digital watermarking technologies .

针对图像载体中通常都含有比较多的边缘轮廓线，添加水印的过程采取了脊波变换和DCT相结合的方法，脊波变换的核心就是先对图像进行Randon变换，再进行小波变换。

For most of the images contain lots of edge contour , the ridgelet transform and the DCT are used to embed the watermark . The core of the ridgelet transform is first performing the image with the randon transform and then the wavelet transform .

基于图像载体的数字水印抗攻击性技术研究

Research on Technique of Anti-Attack of Image Watermark

提出了一种在图像载体中进行信息隐藏的新方法。

This paper presents a method of information hiding algorithm based on optimal LSBs substitution and image visual perception .

提出了基于混沌相变检测的音频数字水印算法，目前的文献中多讨论将一维正弦信号嵌入到图像载体中。

The audio digital watermarking algorithm is proposed based on chaotic phase-change detection . In the current literature , more discussions are about one-dimensional sinusoidal signal embedded in the image vector .

以图像为载体的最大意义位（MSB）信息隐藏技术的研究

Study of the MSB information-hiding technique in a carrier image

在以调色板图像为载体的密写方法中，最佳奇偶分配（OPA）是一种失真小，因而隐蔽性较好的方法。

Although distortion caused by the optimal parity assignment ( OPA ) steganography is very small , it is not secure enough due to the existence of some peculiar colors .

图像为载体的信息隐藏数据量研究

Study of Preferable Quantity of Hiding Data in An Image

然后从基于色彩空间和基于信息论两种模型的角度出发，讨论了以图像为载体的最大信息嵌入容量问题。

Then based on information thesis and color space , we discuss the max capacity of the image carriers .

而基于信息隐藏技术的电子邮件安全传输方案，利用数字图像为载体，把邮件信息隐藏到图像中，隐藏信息本身的存在性来达到安全传输的目的。

But the safe transmission scheme based on information hiding technique is different , which embeds email into public image and hides the existence of email .

现有的大多数数字水印算法以灰色图像作为载体图像，而在实际应用中，彩色图像占居主导地位。

Most of the schemes about watermark are proposed based on gray image today , but color image plays the most important role in the real life .

以图像为载体的数字隐写技术称为图像隐写。图像隐写利用人的视觉感知冗余和图像数据的统计冗余实现隐蔽通信。

Steganography using image as cover is called image steganography . Image steganography actualizes covert communication by making use of the redundancy in human visual perception system and statistical redundancy of image data .

其中CCD摄像机提取图像实现移动载体的路径跟踪，超声传感器实现避障，无线通讯模块实现远程控制。

The CCD sensor provides the video signal , ultrasonic sensors are used for collision avoidance , the wireless communication module charges for remote control .

变换域方面，以当今广泛使用的JPEG图像格式为载体图片格式，研究离散余弦变换（DCT）域的隐写方法。

In transformation part , based on widespread JPEG format , discrete cosine transformation ( DCT ) is studied for secret embedding .

本文选择数字图像作为水印载体，由Logistic系统产生的混沌序列对水印图像进行混沌置乱，并对图像混沌置乱进行了研究。

In this paper , the digital image as watermarking objects was selected . The watermarking signal was generated by the image which was scrambled with Logistic chaotic system .

算法的核心思想是以BMP文件结构和图像数据为载体，结合Arnold变换和Watson视觉模型，在BMP文件结构和图像数据本身添加相同的水印信息，以此来提高水印的嵌入容量和鲁棒性。

The core design of this algorithm is by taking BMP file structure and BMP image data , combined with Arnold transform and Watson model , embed the same watermark in BMP file structure and image data , in order to improve the capacity and robustness of embedded watermark .

数字图像作为信息载体，已经在日常生活中的各个领域得到广泛使用。

Digital images as an important carrier of information , is widely used in all areas of daily life .

采用的秘密图像是与载体图像大小相等的256级灰度图像，含有很大的信息量。

The secret image is the same size as the cover image which is 256-level grayscale image , with a large amount of information .

在互联网技术不断发展的今天，以图像为主要载体的多媒体信息大大地丰富了我们的生活。为了有效地解决大量图像存储的问题，图像压缩编码技术便应运而生。

With the continuous development of Internet technology , today image-based Multimedia Information deeply enriched our life . To solute the problem of how to store so large amount of image , image-compressed technology came into being .

进行了一些实际应用方面的研究：将单数位矩阵方法应用到以二值图像和MPEG-2为载体的信息隐藏中，获得了较好的效果。

The single bit matrix embedding method is applied into information hiding in binary images and MPEG-2 videos and achieves good results .

F5隐写分析算法利用收缩现象，比较剪裁后图像直方图和估计载体图像直方图的差异进行检测。

F5 steganalysis uses the shrinkage and compares the differences between estimation of the cover-image histogram and the stego-image to realize detection .

文中充分考虑到人类视觉系统特点，采用YCbCr彩色空间，将灰度图像水印信号嵌入载体的亮度分量Y的DCT系数中。

Considering the characteristic of Human Visual System ( HVS ), the method adopted YC_bC_r color space and embedded a grayscale image into the luminance Y of the color image by using discrete cosine transform .

目前，对数字水印的研究主要集中在以图像、声音等载体上，以文本为载体的水印研究成果较少。

Currently , watermarking research is mostly focused on the image and audio , while fewer are focused on the text .

从空间遥感数字图像信息的存储载体&半导体固态图像存储器出发，讨论了空间应用时存储器的数据错误类型及其对策。

Based on the remote sensing digital image information carrier semiconductor solid state image data recorder , the data error types and their countermeasure were analyzed .

自从100多年前电影诞生的那一天起，电影胶片作为图像和声音的载体，以其迷人的影象给全球的影迷们留下了难以磨灭的记忆。

Since cinema had been invented 100 years ago , filmstrip which was the carrier of the image and sound has given the global filmgoers many beautiful recollections .

同时，随着精神文明建设的进步，以图像和视频为载体的信息传播日趋普遍化。

Meanwhile , as the enhancement of the progress of spiritual civilization construction , communication with the usage of images and video as the carrier of information has become increasingly universal .

读图时代呈现出信息媒介图像化、图像载体科技化、生存方式读图化等表征。

In the era of image-reading , there are a lot of superficial characteristics , such as imaged information media , scientific and technical image carriers , way-of-living in image-reading style .

在现代数字散斑测量方法中，一般采用减模式来产生数字散斑条纹图，它是进一步图像处理的信息载体，同时不可避免地附带有大量的乘性噪声。

In modern digital speckle measurement method , we usually adopt subtraction to derive a digital speckle fringe pattern , which is information carrier for post-processing and inherently full of multiplicative noise .

而技术的革新，信息的传播，在推动全球化的同时，也加强了世界范围内的碎片化状况。然后，论述了图像作为信息的载体，现在已越来越重要。

Moreover , technological innovation and information transmission promotes globalization the same time it intensifies the fragmented condition within the world . Second , this article discusses the increasingly prominent importance of image as a carrier of information .

本文采用混合混沌系统加密载体图像，来掩盖载体图像的分布特征，并得到密匙图像，但是保留混沌动力学行为。

And the method to avoid cross sequence circulating reduction . In this paper , first the carrier image was encrypted using mixed chaotic sequence , to hide the distribution characteristics of carrier image , and get the encryption key , but it reserves the characteristics of the chaos dynamics .