图像失真

采用基于模糊积分的图像失真度量代替MAD，提出一种基于宏块条的自适应码率控制算法。

A class of image distortion metric based on fuzzy integral was referred to and applied to the rate controlling .

系统设计了尘埃检测、RGB色彩检测、聚焦检测和图像失真检测模块。软件功能包含系统设置、图像处理和运行检测三部分。

The system includes dust detection , RGB color detection , focus detection and image distortion detection modules , and the software functions involve three parts of system setup , image processing and operation testing .

影像增强器型C形臂具有成本低、使用广泛的特点。但影像增强器会使C形臂存在不可避免的图像失真，导致C臂图像不能正确进行空间定位及导航。

Though Image Intensifier c-arm is well known for its low cost and widely usage , C-arm image cannot orientate and navigate location correctly , due the unavoidable image distortion .

然后对X射线成像系统的标定算法进行改进，提出一种适用于C型臂X射线透视系统的在线标定技术，同时对影像增强器引起的图像失真进行了校正。

Then , we improve the calibration algorithm for the C-arm fluoroscopy image system , propose an on line calibration technique and revise the image distortion caused by the image intensifier .

根据试验结果，分析了图像失真变化规律，给出了不同C臂位姿下计算的校正矩阵的临床适用范围。

According to the results , variation characters of geometric distortion under different C-arm positions and orientations are discussed and the clinically available angle range of the correction matrix obtained under the specific pose is concluded .

基于Radon变换估计倾斜角度的方法检测角度精确，校正后图像失真较小；

The method to estimate skew angle based on Radon transformation is very exact , and the distortion of corrected image is also very little ;

虚切片方法改善Shear-Warp算法的图像失真

Using Virtual Slice Method to Improve Image Quality by Shear-warp Algorithm

实践表明，采用虚切片方法的Shear-Warp算法有效的解决了Shear-Warp算法的图像失真问题。

Experiments show that the Shear-Warp method with virtual slices produces higher quality results .

并引入了一个优于PSNR和MSE的方法来评价含水印图像失真。

And a new universal image quality index which is superior to PSNR and MSE is introduced here to analyze the embedded image distortion .

对于打印／扫描过程产生的像素值失真，本文也提出了一种基于DFT的鲁棒性算法，能在较严重的图像失真情况下，成功检测水印。

To eliminate the influence of pixel value distortion generated during print / scan process , a DFT-based robust watermark algorithm was designed , which could successfully detect watermark from a severe distorted image .

磁聚焦静电偏转（MS）和静电聚焦静电偏转（SS）型摄像管具有图像失真小，分辨率高且均匀，电子束易于垂直上靶，阴影小等优点，所以受到人们的重视。

An electrostatic deflection-type camera tube has the following advantages : The small electron beam spots over the entire the scanned area provide uniform and high resolution picture , normal beam landing performance and deflection linearity are also excellent .

在总的码率限制下，采用遗传算法从有限码率集中选择每组数据的RCPT码码率，使接收端恢复的图像失真最小。

The genetic algorithms are developed for selecting optimal RCPT codes rates from the finite rates set in order to minimize the end-to-end distortion .

为了提高了水印的鲁棒性并减少图像失真，本文根据图像的局部纹理复杂度，嵌入不同强度的水印，并采用DCT算法实现对二值图像的认证。

This paper attempts to use DCT ( Discrete Cosine Transform ) algorithm to realize the authentication of binary image . In order to improve the robustness of digital watermark and reduce image distortion , different intensity of watermark is embedded into the image according to its texture complexity .

在介绍Kundur等提出的非负和集约束递归逆滤波算法的基础上，提出了该算法的改进，利用零相位FIR滤波器的频率特性，消除滤波器带来的相位失真，减少图像失真；

We introduce adaptive filtering applications on signal processing , and NAS-RIF algorithm proposed by Kundur . We suggest methods for improving NAS-RIF algorithms , which utilize frequent a characteristics of zero-phase FIR filter , remove phase distortion caused by the filter and reduce image distortion .

消除二次曲面纹理映射的图像失真的方法

Approach for Eliminating Distortion of Texture Mapping onto Quadric Surfaces

基于几何变换特征集的水印图像失真校正算法

A Geometric Distortions Correction Arithmetic Based on Similar Character Complex for Image Digital Watermarking

激光大屏幕显示系统中振镜扫描的工作原理及图像失真研究

Study on Working Principle and Graphic Distortion of Galvanometer Scanning in Laser Large Screen Displayer

引起图像失真的主要原因是传输误差和量化误差。

The two main causes that images are distorted are transmission error and quantization error .

最终，嵌入水印后图像失真水平可通过输入阈值进行调节。

Ultimately , the watermarked image distortion level can be adjusted by entering the threshold .

矢量码坐标法激光扫描及图像失真分析

Vectorial Laser Scanning and Error Analysis

这个易于安装的软件消除了图像失真，使其兼容几乎所有的数码录像机。

Its easy-to-install software eliminates image distortion and makes it compatible with virtually any digital recorder .

但是由于其在长程传输的过程中，容易出现图像失真。

But in the long distance transmission process , it is used to appear the image distortion .

对这几类失真分别建模，以指导嵌入水印过程中的图像失真控制。

Under the models of all the distortion categories , image distortion can be controlled during watermarking .

它具有图像失真较小、计算速度较快等特点。

So it has the features of light graphic distortion , fast computational speed , and so on .

最后，用软件的方法对此算法进行验证，图像失真得到显著校正。

At last , the algorithm was proved by software , made the correction of figure distortion more positive .

然后对该突变帧进行帧内编码，开始一个新的视频片段，从而使由于场景切换所造成的视频图像失真得到有效抑制。

After filtration operation , the true abrupt frame was coded as intra-frame and then a new video segment began .

在海洋测深过程中，回声测深仪波束角效应使记录的测深图像失真。

In bathymetric survey , the record seabed image is distorted due to the angular beam width of an echo sounder .

但也别被数码变焦镜头的这些数码搞得高兴地昏了头，它同时也会导致图像失真。

But don 't get carried away with digital zoom statistics , the technology can lead to a loss of image quality .

算法中多种色彩空间的配合应用特别是均匀色彩空间的应用，极大地减少了可能引起的图像失真。

The application of multiple color space , especially the uniform color space , greatly reduced the possible distortion in color separation .

从理论出发推导出了两轴夹角与其失真关系的公式，并通过实验观察验证了由此引起的距离向图像失真。

Formulas are deduced theoretically on the relationship between two-axis angle and distortion , and experiments are carried out to prove this situation .