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1.
Reversible data hiding of high payload using local edge sensing prediction   总被引:3,自引:0,他引:3  
This paper tries to analyse a new framework in lossless data hiding research. Its key is how adaptively to get better difference image architectures for given applications. A unique sampled pattern is introduced and described in term of high-similar interpolation image. The proposed method updates a type of conventional algorithm, smoothly accesses to current reconstruction implementation, and outperforms solo weighing approach, particularly in the perceptual quality. Combinational weight factor can be adaptively adjusted by estimating interpolation errors around neighbor pixels. Seeking higher peak value in the difference-image is also our concerns. As an entire algorithm, reversible data hiding based on histogram-difference-shift is also reported. Simulations results demonstrate and verify that our approach is much effective than some recent methods with good generalization performance.  相似文献
2.
基于小波域扩谱的无损数据隐藏   总被引:2,自引:0,他引:2  
该文提出一种基于小波域扩谱的无损数据隐藏方法。该方法根据扩谱原理把数据嵌入到图象整数小波变换后的高频子带系数中;通过嵌入伪信息的方式,解决了在提取信息时无法判断在哪些系数上嵌入了水印信息的问题;另外,为防止小波反变换时图象灰度溢出问题,使用了直方图调整技术。实验结果表明,该方法能嵌入大容量的数据信息,同时保持很好的视觉效果,在图象认证及伪装通讯等领域具有广泛用途。  相似文献
3.
Reversible data hiding based on block median preservation   总被引:2,自引:0,他引:2  
This paper proposes a reversible data hiding scheme for gray level images. It exploits the high correlation among image block pixels to produce a difference histogram. Secret data is embedded based on a multi-level histogram shifting mechanism with reference to the integer median of each block. The image blocks are divided into four categories due to four corresponding embedding strategies, aiming at preserving the medians during data embedding. In decoder, the median pixels are retrieved first followed by the hidden data extraction, and the host image can be accurately recovered via an inverse histogram shifting mechanism after removing the secret data from the marked image. Experimental results validate the effectiveness of our scheme and demonstrate that it outperforms several previous methods in terms of capacity and marked image’s quality.  相似文献
4.
A reversible data hiding scheme using complementary embedding strategy   总被引:2,自引:0,他引:2  
Obtaining good visual quality and high hiding capacity with reversible data hiding systems is a technically challenging problem. In this paper, we propose a simple reversible data hiding scheme that uses a complementary hiding strategy. The proposed method embeds one secret bit horizontally and vertically into one cover pixel of a grayscale cover image by decreasing odd-valued pixels and increasing even-valued pixels by one. Experimental results show that the hiding capacity measured by bit per pixel (bpp) of the proposed scheme is at least 1.21 bpp with a PSNR (peak signal-to-noise ratio) value greater than 52 dB for all standard test images. Especially in the case of four-layer embedding, the PSNR value of the proposed method is still greater than 51 dB at a hiding capacity of about 5 bpp for all standard test images. In addition, the proposed method is quite simple because it primarily uses additions and subtractions. These results indicate that the proposed scheme is superior to many existing reversible data hiding schemes introduced in the literature.  相似文献
5.
用于矢量数字地图的可逆数据隐藏算法   总被引:2,自引:0,他引:2       下载免费PDF全文
提出一种基于差值直方图的可逆数据隐藏算法,用于矢量地图的认证和隐秘通信。通过修改相邻顶点坐标的差值来实现数据隐藏。为减少由扩展嵌入所引起的图形失真,借助差值直方图来选取可嵌入差值,优先选择绝对值小的差值。与现有算法相比,本算法具有较高的嵌入率、较好的图形质量以及精确控制嵌入容量的能力。  相似文献
6.
基于直方图调整的二值图像无损数据隐藏   总被引:2,自引:1,他引:1       下载免费PDF全文
提出一种基于游程编码的直方图调整的二值图像无损数据隐藏新方法。选择长度不小于阈值T1的游程对序列,先进行去除长度为1的白游程操作,然后在长度为T的黑游程处嵌入数据。该方法可以适应文字、图表以及文字和图表的混合图像,也可以适应半色调和非半色调图像。实验表明,该方法在嵌入容量和视觉效果都优于已有的方法。  相似文献
7.
利用预测误差直方图平移的可逆数据隐藏技术   总被引:2,自引:0,他引:2  
根据图像差值直方图的特点,提出了一种在图像差值中进行差值扩展嵌入的可逆数据隐藏技术。为了减少数据嵌入所带来的图像质量退化,提出了几种策略,包括选择交错平移直方图以控制差值移动的个数,利用直方图零点对直方图进行分段以减小在创造嵌入空间时直方图平移的位移,以及一种与直方图平移技术相适应并随负载变化压缩尺寸的溢出位置图。实验表明,本算法比现有文献中的典型算法(例如,Thodi等人的算法和Tian的算法)具有更好的整体性能。在中、低嵌入率下,本文算法性能更加突出。  相似文献
8.
利用差值扩展进行可逆数据隐藏的新算法   总被引:2,自引:1,他引:1       下载免费PDF全文
基于整数哈尔(Haar)小波变换,提出一种新的利用横向和纵向差值图像进行扩展嵌入的数据隐藏算法。传统的差值嵌入技术最大的缺点是在第二重嵌入开始之前图像的质量已经遭到破坏,原因是前一重嵌入用到了很大的差值。针对这个问题,该方法动态地把负载分配到两个正交方向上的图像进行嵌入。尽量使这两个方向上用于嵌入的差值属于同一个幅值范围。与其他算法相比,本算法在同等嵌入率下可取得更好的图像质量。  相似文献
9.
彩色图像的无损数据隐藏   总被引:1,自引:0,他引:1  
杨程云  宣国荣 《计算机工程》2004,30(16):136-138
提出一种在彩色图像中新的无损数据隐藏算法。首先对RGB图像直方图调整分别压缩灰度动态范围。然后进行整数YUV变换和Y分量整数小波变换。最后通过算术编码和哈希变换,将待隐藏信息连同压缩灰度动态范围剩余数据,嵌入小波高分辨率子带的中间位平面内,达到小波反变换时防止溢出的目的,实现无损数据隐藏。文中用6个通用的图像隐藏数据为例,嵌入数据容量达到19~73kbits。将该方法用于电子政务中,取得了良好的效果。  相似文献
10.
Reversible hiding in DCT-based compressed images   总被引:1,自引:0,他引:1  
This paper presents a lossless and reversible steganography scheme for hiding secret data in each block of quantized discrete cosine transformation (DCT) coefficients in JPEG images. In this scheme, the two successive zero coefficients of the medium-frequency components in each block are used to hide the secret data. Furthermore, the scheme modifies the quantization table to maintain the quality of the stego-image. Experimental results also confirm that the proposed scheme can provide expected acceptable image quality of stego-images and successfully achieve reversibility.  相似文献
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