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Description: 为保证网络信息传输的安全性,提出一种视频图像加密方法。该方法引入混沌系统中的Logistic映射和
Baker映射,结合H·264视频压缩编码特点,利用Baker映射对DCT (Discrete Cosine Transform)变换量化后
的块进行位置置乱,
-In order to ensure the safety of information transmission network, and a video image encryption method. This method is the introduction of chaotic systems in Logistic mapping and Baker mapping, combined with H 264 video compression coding features, the use of Baker mapping of DCT (Discrete Cosine Transform) transform to quantify the location of block after scrambling,
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Size: 155648 |
Author: 武同学 |
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Description: 为保证网络信息传输的安全性,提出一种视频图像加密方法。该方法引入混沌系统中的Logistic映射和
Baker映射,结合H·264视频压缩编码特点,利用Baker映射对DCT (Discrete Cosine Transform)变换量化后
的块进行位置置乱,
-In order to ensure the safety of information transmission network, and a video image encryption method. This method is the introduction of chaotic systems in Logistic mapping and Baker mapping, combined with H 264 video compression coding features, the use of Baker mapping of DCT (Discrete Cosine Transform) transform to quantify the location of block after scrambling,
Platform: |
Size: 155648 |
Author: 武同学 |
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Description: a self- embedding block wise fragile watermarking scheme with tamper detection and content recovery capability. The proposed scheme embeds the shuffled extensive ten bit Recovery
data and two bit Authentication data of the image block into the least
significant bits (LSB) of its corresponding mapping block.The integrity
of a test block is decided by comparing 2×2 non overlapping block
of the test block with its corresponding mapping block. Experimental
results show that the suggested scheme outperforms conventional self recovery fragile watermarking algorithms in alteration detection as well
as in tamper recovery of the image.
Platform: |
Size: 273408 |
Author: durgesh singh |
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Description: DCT域运动补偿误差或原始图像信息转换成块的系数代表的设置不同的频率成分, 它有两个优点:第一,信号1,小范围内的大部分能量集中在频域。这样的描述是几个要点的重要组成部分;第二,将频域分解过程映射到人类视觉系(The coefficients of the DCT domain motion compensation error or the original image information convert into blocks are represented by different frequency components. It has two advantages: first, signal 1, most of the energy in the small range is concentrated in the frequency domain. Such a description is an important part of several key points. Second, mapping the frequency domain decomposition process to the human visual system.)
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Size: 233472 |
Author: Mrrrrrrrrrrrrrrrr |
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Description: 只有在图像区域非常低的视频信号中才含有高频频谱。因此,在数字视频信号处理,根据频谱分配比特的比特数的因素:包含大量的区域分布较低的频谱信息的比特数含有较高的频谱分配较低量的信息,和图像质量并没有明显的损伤,达到压缩率的目的。然而,所有这些都是为了在低熵(熵)的情况下实现有效的编码。(The coefficients of the DCT domain motion compensation error or the original image information convert into blocks are represented by different frequency components. It has two advantages: first, signal 1, most of the energy in the small range is concentrated in the frequency domain. Such a description is an important part of several key points. Second, mapping the frequency domain decomposition process to the human visual system.)
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Size: 63488 |
Author: Mrrrrrrrrrrrrrrrr |
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Description: 离散余弦变换(DCT)是一种常用的数字速率变换编码方法。DCT首先将整个图像分割成n×n像素块,然后在n×n像素块上逐帧执行DCT变换。由于图像的高频成分很小,与高频分量对应的系数通常为零,肉眼对高频分量的变化并不敏感, 因此,我们使会用简洁的定量方法。因此,数字传输系数的速率远小于用于传输图像像素的数字速率。到达接收机后,逆离散余弦变换返回到样本值。虽然会有一定的失真,但人眼是可以接受的。(The coefficients of the DCT domain motion compensation error or the original image information convert into blocks are represented by different frequency components. It has two advantages: first, signal 1, most of the energy in the small range is concentrated in the frequency domain. Such a description is an important part of several key points. Second, mapping the frequency domain decomposition process to the human visual system.)
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Size: 6259712 |
Author: Mrrrrrrrrrrrrrrrr |
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Description: 距离编码又称旅行码或旅行码,是一种属于无损压缩编码的统计编码。
游程编码的基本原理是用连续的符号值或字符串长度替换相同连续值的符号。因此,行程代码被命名为)以便符号的长度小于原始数据的长度。
当对图像数据进行编码时，具有相同灰度值的像素被布置在特定方向上，并且可以被视为连续符号。用字符串替换这些连续符号可以大大减少数据量。行程编码是连续而精确的编码。如果其中一个符号在传输中是错误的,则将影响整个编码序列,从而使中风代码无法恢复到原始数据。(The coefficients of the DCT domain motion compensation error or the original image information convert into blocks are represented by different frequency components. It has two advantages: first, signal 1, most of the energy in the small range is concentrated in the frequency domain. Such a description is an important part of several key points. Second, mapping the frequency domain decomposition process to the human visual system.)
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Size: 188416 |
Author: Mrrrrrrrrrrrrrrrr |
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Description: 软件编码的成本主要是人力和时间。最终的软件是一个人或一个团队的智慧。知识成本积累产生的无形资产巨大。图像在当今信息社会中扮演着重要的角色,它的资源是巨大的。在追求时间和空间的今天,研究图像压缩是可行的。(The coefficients of the DCT domain motion compensation error or the original image information convert into blocks are represented by different frequency components. It has two advantages: first, signal 1, most of the energy in the small range is concentrated in the frequency domain. Such a description is an important part of several key points. Second, mapping the frequency domain decomposition process to the human visual system.)
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Size: 44267520 |
Author: Mrrrrrrrrrrrrrrrr |
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