image degradation meaning in English
图像递降
星象劣化
影像退化
影象劣化
影象衰退
Examples
- An advantage of wavelet - based video compression is that it offers more graceful image degradation at high compression ratios , and it also eliminates the block artifacts seen in dct compression
由小波变换编码实现的视频压缩在具备高压缩比的基础上，仍拥有较高的主观视觉效果，避免了由分块dct变换引起的方块效应。 - After analyzing the relationship among embedding parameters adjustment , attack elusion and performance evaluation , we construct an " evaluation - automatic adjustment " message embedding framework . some key issues of performance evaluation are investigated in this thesis : 1 ) evaluation of the image degradation
本文分析了隐藏算法参数调节、攻击规避和性能评估之间的关系，提出了以“性能评估?自动调节”为核心的密信信号隐藏技术框架。 - The analysis on the method shows that an advantage of wavelet - based video compression coding is that it offers more graceful image degradation at high compression ratios , and it also eliminates the block artifacts seen in dc compression . and it can solve the contradiction between limited bandwidth and infinitude requirements of increasing customers in present communication system
该系统充分利用人眼的视觉特性来减少帧内和帧间的冗余信息，能够消除传统图像编码的方块效应、蚊子效应等现象实现高压缩比，高质量的图像编码，可较好地解决现行通信系统中有限带宽与日趋增加的无限用户需求之间的矛盾。 - Moreover , experimental results have proved that the method is robust enough to some image degradation process such as cropping , jpeg compression and sharpening etc . embedded zerotree wavelet coding ( ezw ) algorithm , it is found that this algorithm does not make full use of the properties of human visual system ( hvs ) to eliminate visual redundancy
实验证明，该方法对剪裁、 jpeg压缩和锐化等图象退化处理均具有一定的抵抗力，是一种行之有效的水印嵌入方法。本文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。 - This paper is focused on images watermarking algorithms . watermark casting operates in frequency domain , embeds pseudo - random sequence of real number in selected coefficients without image degradation . a blind watermark retrieval technique that can detect the embedded watermark without resorting the original image is proposed , so that the proposed techniques represents a major improvements to those relying on the comparison between the watermarked and original image , which is not practical for a huge image database
本文主要研究针对图像水印系统的算法研究，采用伪随机序列作为水印信号，利用变换域系数作为水印的载体，在不降低图像质量的前提下达到嵌入水印的目的，在恢复水印的过程中无需原始图像的参与，相比较那些需要利用原始图像恢复数据的系统，文中所提出的方案更具有实用性。