Description: 根据Arnold置乱变换算法的过程和8位图像像素值的取值范围（0≤f(x, y)≤255），导出了一种逆变换算法。该算法假设了两个变量p和q，由Arnold正变换算法导出了四个方程组，然后再根据像素值的取值范围，计算出p和q的可能取值，针对p和q的取值组合，计算出各方程组的解，那么在所有方程组解中满足像素值取值范围的即为逆置乱的解。经分析，逆变换算法的解忧且仅有一个。-According to Arnold scrambling algorithm process and 8-bit image pixel value range (0 ? f (x, y) ? 255), derived a kind of inverse transform algorithm. The algorithm is assumed that two variables p and q, by Arnold transform algorithm is derived for the four equations, and then in accordance with the range of pixel values to calculate p and q possible values for p and q values combination of the equations to calculate the solution, then all equations in the solution to meet the pixel value range of which is the solution of inverse scrambling. After analysis, inverse transform algorithm and only one of the worries. Platform: |
Size: 4096 |
Author:nubga |
Hits:
Description: 基于混沌系统的图像加密算法，先采用Arnold猫映射进行像素点位置置乱，然后对置乱后的图像的像素值进行Liu混沌加密或者Lorenz混沌加密。-Chaotic systems based on image encryption algorithm, first using Arnold cat map for the location of pixel scrambling, and then scrambling image pixel values Liu chaotic encryption or Lorenz chaotic encryption. Platform: |
Size: 1416192 |
Author:巢歌 |
Hits:
Description: 提出一种基于DWT和DCT域的有意义二值图像数字水印算法 利用Arnold变换对水印序列进行置乱,消除象素的空间相关性,增加水印的安全性 而结合小波波变换和离散余弦变换的特性,将水印信息嵌入到图像变换域的低频和中频系数中,提高水印的鲁棒性和不可见性 实验证明该算法具有较好的抗压缩、抗噪音和抗剪切性。
-Making meaningful binary image digital watermarking algorithm based on DWT and DCT domain using Arnold transform the watermark sequence scrambling, eliminating the spatial correlation of pixel, increasing the security of the watermark and small wave transform and discrete cosine transform characteristics of the watermark information embedded in the low and intermediate frequency of the image transform domain coefficients, improve the watermark robustness and invisibility experiments show that this algorithm has good resistance to compression, anti-noise and shear resistance. Platform: |
Size: 578560 |
Author:apwyhh |
Hits:
Description: 以一幅256*256像素的图像为例, 利用MATLAB程序实现Arnold算法。对图像中的每一个像素做运算,之后就完成了一次图像遍历, 使之达到置乱加密的效果-A 256* 256 pixel image, for example, using MATLAB program implementation Arnold algorithms. Computing for each pixel in the image, after completion of an image traverse, so as to achieve scrambling encryption effect Platform: |
Size: 1024 |
Author:liu |
Hits:
Description: 文件1是对固定区域进行arnold置乱；文件2是通过调整最左上角像素的坐标来选择置乱区域；文件3是进行多区域arnold置乱；文件4是利用求逆矩阵的方法进行Arnold反变换-File a fixed area is arnold scrambling File 2 is achieved by adjusting the pixel coordinates of the upper left corner to select scrambling region 3 is a multi-area file arnold scrambling document 4 is carried Arnold anti utilize inverse matrix method convert Platform: |
Size: 2048 |
Author:乔帆 |
Hits:
Description: 基于忆阻器的混沌信号产生索引序列进行图像加密处理，实现图像像素置乱。-Based on the chaotic signal to produce the index of today sequence to encrypt the image processing, image pixel scrambling. Platform: |
Size: 178176 |
Author:张倩 |
Hits:
Description: :目前混沌系统与加密技术相结合是现如今最热门的一个课题，虽然有大量的加密算法面世，但是这些加密算法并不成熟，仍然需要进一步的研究。本文采用像素位置置乱变换和像素值替代变换相结合的加密思想，设计出一种基于混沌的数字图像加密算法。引入了整数域上的逆仿射变换，算法中采用二维 logistic 混沌映射相结合的方法，生成多组混沌序列，像素置乱变换与灰度值替换都由这些混沌序列所控制。多混沌序列产生的密钥空间大于单一的混沌序列所产生的密钥空间，因此本文研究的算法加密强度很高。-The current chaotic system with encryption technology combined is now one of the hottest topics, although there are a number of encryption algorithms available, but these encryption algorithms are not ripe, still need further study. In this paper, the pixel position and the pixel value Scrambling alternative encryption ideological transformation combining design a digital image based on chaos encryption algorithm. The introduction of the inverse affine transformation integer domain, the algorithm uses a two-dimensional logistic chaos mapping method of combining to produce multiple sets of chaotic sequence, scrambling transformation and pixel gray values are replaced by the chaotic sequence control. Key space more chaotic sequence is greater than the key space of a single chaotic sequence generated by the algorithm to encrypt and therefore high strength paper. Platform: |
Size: 836608 |
Author:sanmei |
Hits:
Description: 实现对图像的加密和解密，采用Arnold变换来实现图像置乱，和Logistic混沌映射来实现像素变换。-Realize image encryption and decryption, using Arnold transformation to achieve image scrambling, and Logistic chaotic mapping to implement a pixel conversion. Platform: |
Size: 1024 |
Author:trj |
Hits:
Search - pixel scrambling