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视觉冗余
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  visual redundancy
     The spatial information hiding based on the human inherent visual redundancy to image was studied. At first,several algorithms based on the Least Significant Bits(LSB) and multiple bits of color image were presented.
     依据人类对于图像的视觉冗余特性研究了空域上的信息隐藏,给出了基于最低有效位(LSB)和其他多位隐藏和检测方法的算法和流程,并且通过编程实现;
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  “视觉冗余”译为未确定词的双语例句
     Because of the great amount of data and information in image, it is necessary to compress the image data in order to adapt to the practical application demand. The redundancy of statistic, structure and vision in image provides the possibility to image compress.
     由于图像信息丰富、数据量大,因此,为满足实际应用需要,有必要对图像数据进行压缩处理,而图像数据中存在着大量的冗余信息,包括统计冗余、结构冗余以及视觉冗余等,所以为压缩提供了可能,目前已发展成为专门的研究领域——图像编码。
短句来源
     Because of the great amount of data and information in image, it is necessary to compress the image data in order to adapt to the practical application demand. The redundancy of statistic, structure and vision in image provides the possibility to image compress.
     由于图像信息丰富、数据量大,因此,为满足实际应用需要,有必要对图像数据进行压缩处理,而图像数据中存在着大量的冗余信息,包括统计冗余、结构冗余以及视觉冗余等,所以为压缩提供了可能,目前已发展成为专门的研究领域,即图像压缩。
短句来源
     The principles, commonly used methods and criteria of data compression are introduced descriptively. It is considered that there exist redundancies of space, time, knowledge and visual perception, data can be compressed.
     概括性地介绍了数据压缩的基本原理、常用的数据压缩方法以及压缩标准,认为数据因为具有空间、时间、知识和视觉冗余,因此可被压缩,数据的压缩类型可分为无损压缩和有损压缩两大类,压缩标准有JPEG标准、H.
短句来源
     Digital image watermark, as a branch of data hiding technology, imbeds symbol information into the protected image using the redundancy attribute of Human Visual System. As a new methodology of copyright protection of digital image, it has become a hotspot in that field recently.
     数字图像水印技术是信息隐藏的一个分支,它利用人眼视觉冗余,将标志信息作为水印嵌入到被保护图像之中,是数字图像版权保护的一个新兴方法,也是数字产品版权保护领域中的一个研究热点。
短句来源
     Digital image watermark, as a branch of data hiding technology, imbeds symbol information into the protected image using the redundancy attribute of Human Visual System. As an effective approach of copyright protection of digital image, it has become a hotspot in the field of information security recently.
     数字图像水印技术是信息隐藏的一个分支,它利用人眼视觉冗余,将标志信息作为水印嵌入到被保护图像之中,是数字图像版权保护的一个新兴方法,也是数字产品版权保护领域中的有效途径,近年来已成为信息安全领域的一个研究热点。
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  相似匹配句对
     Vision
     视觉
短句来源
     Beyond Vision
     视觉之上
短句来源
     So, a vision measuring system is constituted of more redundancy sensors.
     为此 ,采用冗余多传感器构成视觉坐标测量系统。
短句来源
     In this paper, a rule of motion planning for visual servo redundant robots is developed.
     本文提出了一种适用于视觉伺服冗余机器人的运动规划方法 .
短句来源
     DATA REDUNDANT IN RELATIONAL DATABASE
     关系数据库的数据冗余
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  visual redundancy
This is followed by a scene-clustering algorithm that eliminates visual redundancy among the units.
      


In this paper, perceptual error threhhold (PET) functions in different wavelet subbands are obtained through subjective tests on artificial patterns. A new and generic two-stage coding scheme is thus proposed, based on the nonuniform zero-trees of wavelet coefficients and the visually nonuniform quantization of small coefficients in higher subbands. Researches have been done for the visual transparent and nearly transparent cases, in comparisons with JPEG standard. Experimental results showed the feasibility...

In this paper, perceptual error threhhold (PET) functions in different wavelet subbands are obtained through subjective tests on artificial patterns. A new and generic two-stage coding scheme is thus proposed, based on the nonuniform zero-trees of wavelet coefficients and the visually nonuniform quantization of small coefficients in higher subbands. Researches have been done for the visual transparent and nearly transparent cases, in comparisons with JPEG standard. Experimental results showed the feasibility and robustness of the scheme. Transparent quality can be obtained around 10 compression ratios for natural images.

本文以小波作为编码框架,通过对人工合成图像的主观实验,得出小波变换域中各不同频带的视觉误差阈值函数,进而提出了一个新的量化编码方案。该方案基于小波域非均匀零树结构量化和高频低能系数的视觉非均匀量化。对实际图像的感知熵和几乎透明的情形作了研究,与JPEG标准也作了比较。实验表明该方案较充分、自适应地考虑人眼视觉冗余,具有稳健、实际可行的特点。对自然图像,在十倍压缩比左右可有视觉无失真质量。

Through the study of the Embedded Zerotree Wavelet Coding (EZW) algorithm, it is found that this algorithm can not fully utilize the properties of Human Visual System(HVS) to eliminate visual redundancy. An improved image compression algorithm based on bi orthogonal wavelet coefficients is thus presented, mainly including: 1. The subimage of the lowest frequency (LL4) is carried out lossless compressed coding; 2. The subimages on the diagonal direction of the highest frequency(HH1) is abandoned and is not carried...

Through the study of the Embedded Zerotree Wavelet Coding (EZW) algorithm, it is found that this algorithm can not fully utilize the properties of Human Visual System(HVS) to eliminate visual redundancy. An improved image compression algorithm based on bi orthogonal wavelet coefficients is thus presented, mainly including: 1. The subimage of the lowest frequency (LL4) is carried out lossless compressed coding; 2. The subimages on the diagonal direction of the highest frequency(HH1) is abandoned and is not carried out coding, because it is of great probability for zero, and it little affects visual. 3. The rest of the subimages are given different bit numbers according to their different characteristics. Then they are carried out quantization of zreotree and run length coding. Experimental results show that this algorithm is more effective.

在对零树编码方法研究的基础上 ,针对零树编码方法没有充分利用HVS特性来有效消除视觉冗余的缺点 ,提出了一种基于小波系数的零树编码方案。其主要包括对最低频子带单独进行无损压缩编码 ,对最高频对角线方向子带舍去不编码 ,对其余各子带根据视觉特点的不同 ,分别分配不同的比特数并按其进行零树量化 ,最后再游程编码。实验表明 ,该方法是一种比较有效的方法。

The paper proposes an image compression and coding scheme based on discrete wavelet transform (DWT), which makes the best of the relativities among original image and coefficients of wavelet, the relativities among pixels of subimages, the relativities among directions of subimages. Human visual specialities were considered, so the compression scheme leads up to make full use of the statistical redundancy and visual redundancy of image. To get high compression ratio and good quality of image, the coefficients...

The paper proposes an image compression and coding scheme based on discrete wavelet transform (DWT), which makes the best of the relativities among original image and coefficients of wavelet, the relativities among pixels of subimages, the relativities among directions of subimages. Human visual specialities were considered, so the compression scheme leads up to make full use of the statistical redundancy and visual redundancy of image. To get high compression ratio and good quality of image, the coefficients of image working on the quality of image greatly were reserved accurately, but the coefficients of image working on the quality of image slightly were quantified roughly. Also, the regrouping and coding of the coefficients could be used universally. The experimental results show that the compression method is provided with simply calculating, little time for coding and decoding and satisfying quality companied with high compression ratio.

提出了一种基于小波变换的图像压缩编码方法 ,充分利用图像分解后所得小波系数与原始图像的关系、各个子图像象素之间的相关性、各子图像方向上的相关性以及与人眼视觉特性 (HVS)的关系 ,做到充分利用图像的统计冗余与视觉冗余。为了得到高的压缩比和好的图像质量 ,精确保留对图像质量影响大的系数 ,而对图像质量影响小的系数进行粗略量化。同时 ,在对小波系数的组织和编码上 ,也做到了具有普遍适用性。结果表明 ,此方法计算简单、计算量小 ,编解码时间少 ,在压缩比较高的情况下获得了较好的图像质量。

 
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