Block truncation coding (BTC) is a fast lossy image compression technique.
块截短编码(BTC)是一种基块的快速有损图象压缩技术。
However, the compression is normally lossy (in other words, image data is thrown away as part of the compression process).
但其压缩通常是有损的(换句话说，在压缩过程中会丢弃图像数据)。
Experimental results show that the proposed scheme is robust for some image processing operations such as lossy JPEG compression, low pass filtering, median filtering and cropping.
实验结果表明水印是不可察觉的，经过JPEG有损压缩、低通与中值滤波、剪切等图像处理操作后仍是鲁棒的。
As one method of image lossy compression vector quantization has great compression ratio.
作为图像有损压缩的方法之一，矢量量化的压缩比极大。
The physical validity based lossy compression algorithms are usually accompanied with VOP structural distortion, leading to the degradation of the reconstructed image quality.
基于物理真实的有损压缩往往伴随有VOP结构形变，导致重构图像质量下降。
A low complexity, easy for hardware implementation of image lossy compression algorithm is presented.
提出了一种具有复杂度低、易于硬件实现的图像有损压缩算法。
For sake of using bandwidth more effectively and saving the storage media, it is necessary to make lossy compression on image and video.
为了更加有效的利用带宽和节约存储空间，往往需要对图像和视频进行有损压缩。
In addition, robustness of the scheme against JPEG lossy compression, image enhancement, noise addition and statistical averaging attacks among others are provided.
此外，文中还分析了算法对JPEG压缩、图像增强、加入噪声及共谋攻击等操作的鲁棒性。
The popular lossy-JPEG image compression arithmetic and phase-shifting technology are introduced.
简介了当今流行的JPEG有损压缩技术和相移技术。
Quantization is one of the key step of Lossy compression, the performance of quantization has great influence on the image compression coding system.
有损压缩的关键步骤之一是量化，量化性能好坏对整个图像压缩编码系统有很重大的影响。
Experimental results show that the proposed technique has good efficiency, security, imperceptibility, highly good robustness to common image processing operation and the JPEG lossy compression.
实验表明，该方法简单、高效、安全性能好，且具有较好的不可感知性，对通常的图像处理及JPEG压缩等具有极好的稳健性。
The experimental results and attack analysis show that the watermark algorithm is robust against some image processing operations, such as JPEG lossy compression , rotation, cropping and noise adding.
实验结果表明该水印算法具有良好的抗JPEG压缩、旋转、裁剪和加噪等常见攻击的能力。
Experimental results show that this scheme is very robust against the typical image processing attacks such as noise, filtering and lossy compression.
实验表明，该算法对于抵抗各种噪声、滤波和压缩等攻击具有很好的鲁棒性。
Experimental results demonstrate that the watermark is invisible and robust against common image lossy compression and noise.
实验结果表明，算法实现的水印具有不可见性，而且对于常见图像压缩和噪声干扰具有很好的健壮性。
Experimental results demonstrate that the watermark is invisible and robust against common image lossy compression and noise.
实验结果表明，算法实现的水印具有不可见性，而且对于常见图像压缩和噪声干扰具有很好的健壮性。
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