而且对于不同的图像，该评价方法能在一定程度上反映了所用的置乱变换在各个加密阶段的效果。
For different images, when some transformation is used, this appraisal method can reflect to some extent the scrambling effects in each encryption stage.
该算法利用线性同余模型产生伪随机序列以对图像进行空间置乱，采用异或操作实现图像的灰度变换。
It achieves space chaos of an image with a pseudo-random sequence generated by linear congruential method, and achieves gray chaos by XOR operation.
利用小波分解的能量分布规律，提出了基于小波变换的图像隐藏算法，并利用素数置乱对隐藏算法作进一步的改进。
By using the energy distribution of the wavelet decomposition, image hiding algorithm based on wavelet transformation is presented, and then improved with prime number scrambling algorithm.
提出了一种基于队列变换的数字图像置乱新算法。
A new class of digital image scrambling algorithm based on the method of queue transformation is proposed.
数字图像置乱利用一种可逆的变换将原始图象变换成一个杂乱无章的新图像，它通常作为图像信息安全与隐藏的基础性工作。
As the basic means for hiding huge image information, the scrambling of digital image makes the old image to a new disorderly image with a reversible transform.
使用混沌映射将二进制商标的像素在空间区域中进行随机置乱，然后将置乱的信息分块嵌入在图像的DCT变换系数中。
The chaotic mapping enables the logo pixels rearrange randomly in the specified spatial domain, and the mixed bits of the logo were embedded in the image DCT coefficients.
提出了一种新的密钥控制下的分层变换的数字图像置乱算法。
Presents a new technology for scrambling and restoring digital image Based on the hierarchical transformation under the control of secret key.
由于排序变换的不规则性，因此新的混沌图像置乱算法具有较强的保密性能。
Due to the strong irregularity of sort transformation, the new chaotic images scrambling algorithm possesses high security.
另外，在生成初始水印后又加入了混沌变换置乱水印，因此可提高数据库水印的鲁棒性和安全性。
Moreover, add change of order used chaotic sequences after the initial watermark generated; therefore this can improve the safety of database watermark.
本文讨论了现有的置乱加密方式，并结合该方式的周期性，提出了一种置乱反变换恢复的方式。
This text discuss that place confusion to encrypt a method existingly, and combine the periodic of that method, put forward a kind of method that places confusion and anti- transformation to recover.
该算法利用线性同余模型产生伪随机序列以对图像进行空间置乱，采用异或操作实现图像的灰度变换。
In this article we introduced the idea of linear congruence, and the methods to generate pseudorandom integer and real sequences.
该算法利用线性同余模型产生伪随机序列以对图像进行空间置乱，采用异或操作实现图像的灰度变换。
In this article we introduced the idea of linear congruence, and the methods to generate pseudorandom integer and real sequences.
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