失真率

■距离及随机场的失真率函数

■ Distance and Distortion - Rate Function of Random Fields

它采用了电压闭环负反馈以及有效的PID调节环节和相应的超前校正环节，能保证很小的失真率和快速的动态响应能力。

The control circuit used very efficient PID modulation and anticipatory control so the power amplifier had little distortion and fast dynamic response .

然后提出了一种新的速率失真率（RD）框架内的帧内刷新策略。

Then we propose a novel intra refresh scheme in rate-distortion ( R-D ) framework .

该方法通过一个特殊的Markov链模拟变论域自适应模糊控制器工作过程，解决了它的失真率计算问题，并证明这个方法是可行的。

By simulating the performance of the adaptive fuzzy controller based on variable universe by a Markov chain , the problem of the computation of distortion ratio is solved .

采用DPCM方法，对低频子带进行无损压缩，有效地降低了最后的失真率；

Using the DPCM method to code the lower frequency individually to reduce the distortion rate ;

结论本研究获得了有关RVG数字成像系统根尖片失真率的信息，为临床应用提供参考依据。

Conclusion The distort rate of RVG image should be considered in clinical application .

对于无限大图像I定义了一个失真率函数d（R/I）.它是在有限状态编码译码意义下和给定信息率R时渐近可达的失真下限。

For every individual images I we define a distortion-rate function d ( R / I ) which is shown to be an asymptotically attainable lower bound on the distortion that can be achieved for I by any finite-state encoder operating at a fixed output rate R.

对多幅图像的实验表明，该算法不但能够达到13%的高隐藏容量（压缩因子为75），而且掩密后图像总体DCT系数直方图的平均失真率为0.81%。

In this way , the change of the histogram is compensated and the hiding capacity is not reduced yet . Several experimental results demonstrate that the algorithm can attain a high hiding capacity of 13 % ( the quality factor is 75 ) .

关于汽车后视镜失真率测量方法的探讨

A Discussion on Distortion Rate Measuring Method of Rear Vision Mirror

基于图像分析的后视镜失真率自动检测方法

Automatic Distortion Detection for Automobile Rearview Mirror Based on Image Analysis

参考水印用来度量各个通道的比特失真率，通过该失真率来估算嵌入的鲁棒水印。

The robust and reference watermarks are embedded into all the channels .

牙种植数字化全景X线片失真率的临床评价

The Clinical Evaluation for the Distorted Rate of Digital - Panoramic Radiograph in Dental Implant

目的：探讨颌骨不同种植部位在曲面断层片上的失真率。

Objective : To evaluate the distortion rate of dental implant bed in the jaw by the orthopantomography .

指出了图像的压缩率与重构图像的失真率存在一定的关联。

There is certain connection between the compression rate of image and the distortion rate of image reconstruction .

目的探讨颌弓形态对曲面体层摄影下颌骨垂直失真率的影响。

Objective To discuss the effect of the shape of mandibular arch on uprightness distortion ratio in computed orthopantomography .

实验表明嵌入水印后的图像及检测水印图像视觉失真率低，嵌入水印有很好的鲁棒性。

The experimental results show the method can survive image cropping and image compression , and the embeded watermark is robust .

在计算机绘制地图光滑曲线的方法中，线形插值法计算简单，失真率较大。

Among those curve smoothing methods in automatic drawing of maps the linear insertion method is simple but accompanied with obvious distortion .

测试失真率应注意平均曲率半径及镜面边缘部位曲率半径的测试；

Attention should be paid to the average curvature radius and that of the mirror face edge zone , when measuring the distorsion .

该算法具有很好的细节处理效果，在大压缩比的情况下使图像的失真率大大降低。

On the condition of bit stream lost , it can preserve image detail information and reduce the image distortion at bigger compression ratio .

人的嘴、下巴和颏的部位在基准位置下，颏孔及下颌孔部的变形失真率最大。

The area of the human mouth , chin , and jaw . The largest distortion was at mental and mandible foramen regions at standard positon .

频率域加密密文图像能根据传输率要求随时进行相应压缩比的有损压缩，并能解密得到较低失真率的解密图像。

For the encryption algorithm in frequency domain , the cipher-image can be lossy compressed , and low-distortion plain image can be obtained after decrypting the compressed cipher-image .

文章介绍了汽车后视镜失真率的测试原理，针对国内目前测试方法存在的问题，提出了新的测试方法，并据此设计了新型汽车后视镜失真率测试仪。

The testing principle of rear vision mirror distortion , rate is introduced . According to the existing problems in present testing method , the new testing method is raised .

用户可以根据偏好选择不同的策略，同时，紧凑和全面策略的失真率分别比[Porter2003]的方法低8.5%和9.1%。

Experiments show that the distortion rate of shortest path representation and minimal distortion scheme is lower by 8.5 % and 9.1 % than the method of Porter [ Porter 2003 ] , respectively .

减少失真率的重要措施是精选镜片玻璃、提高和保持模具的精度、严格控制镜面生产环境的温度及镜片与镜壳的装配尺寸等。

The way to reducing the distorsion is to pick carefully the lens , improve and maintain the mold accuracy , and control strictly the environment tempera ture for producing mirror face , and the mounting size of lens and mirror bracket .

本文使用数字相机成像，针对数字图像，设计并实现了基于图像分析的失真率自动检测算法，通过圆心检测、图像分割、直线与圆交点检测等几个步骤，完成了自动检测功能。

This paper introduces a new automatic detection method based on the computer analysis of the images from digital camera . By the steps of circle centre detection , image segmentation and cross detection , the method succeeds in detecting distortion automatically , efficiently and exactly .

图像压缩技术研究目前主要集中于如何获得高压缩比、低失真率等；此外，针对应用领域的特点，研究适合于行业应用的视频图像压缩技术也是热点之一。

These days , the studies of image compression have been concentrated on how to get high compression ratio , low distortion rate , etc. Further more , according to the characteristic of different areas , how to get the appropriate compression method for industry application is also a focus .

GB/T7627-1987数据传输用失真和差错率测量仪的特性

Characteristics of distortion and error-rate measuring apparatus for data transmission

提出了一种基于相对失真测度的率失真斜率提升感兴趣区域编码算法。

An algorithm based on relative distortion measure for ROI ( Region-Of-Interest ) is proposed which is attained by lifting the rate-distortion slopes .

移动多媒体通信中失真估算及功率率失真优化研究

Research on Distortion Estimation and Power Rate Distortion Optimization for Mobile Multimedia Communications

视频通信中的基于拉格朗日乘子法的率失真模型的两个基本组成部分是失真度和比特率。

The two basic component of rate-distortion model based on Lagrange multiplier in video coding are distortion and rate .