理想成像

由于加工误差和装配误差的存在，摄像机光学系统与理想的小孔透视模型有一定的差别，致使物体点在摄像机图像平面上实际所成的像与理想成像之间存在不同程度的非线性光学畸变。

Because of having processing error and assembling error the difference exists in the model of the camera optical system and pinhole model , which results to nonlinear distortion between real image and ideal image to some extent .

首先，本论文通过分析平行束CT系统的理想成像关系，提出了一种适用于平行束CT系统几何失真校正的方法。

The main work can be summarized as follows : Firstly , by analyzing the ideal geometric relation in parallel CT system , the thesis presents a calibration method of geometric misalignment .

结论：MSCT容积扫描和MPR、VR重组对峡部裂及其继发病变具有良好的显示能力，是检出腰椎峡部裂及其继发病变的理想成像方法。

Conclusion : MSCT MPR and VR techniques have good display ability in spondyloschisis and its secondary abnormity , it is an ideal method in spondyloschisis diagnosis .

理想成像系统的分辨率受经典衍射极限限制。

In an ideal imaging system it is determined by diffraction limit .

分辨率是成像系统最重要的性能参数。理想成像系统的分辨率由衍射极限决定。

Resolution is the most important performance parameter of an imaging system and in an ideal imaging system it is determined by the diffraction limit .

叠前深度偏移技术有效地解决了构造复杂地区理想成像效果的问题，不足之处是其数据量和计算量巨大，而集群并行机的出现较好地解决这一问题。

Prestack depth migration technique effectively solved the issue of ideal imaging in complex structural areas , the shortcomings are giant data volume and computing effort .

特征定位远不是一个己经解决的问题，尤其需要注意非理想成像条件下的特征定位问题。

Feature points alignment far from being a problem has been solved . In particular , it required that we should attent when we solved the problem under non-ideal conditions .

用光学信息论本征理论讨论共焦激光扫描显微镜光学系统的成像关系，获得在理想成像及有像差时系统的光学信息量的表达式。

By using the eigen-theory method of optical information theory , the imaging relationship of the optical system of a confocal laser scanning microscope is discussed . The expressions of the amount of information are given when the system is aberrationless and aberrated , respectively .

然后根据理想成像四分之一波长的波像差限制，从离焦再现位相误差角度对菲涅耳数字全息的焦深作了进一步分析，结果与用再现像强度判据得到的焦深相差近三分之一。

Then according to the 1 / 4 wave-imaging-difference limitation of the ideal imaging , the depth of focus of Fresnel digital holography is analyzed further from the off-focusing phase error . The difference between the two methods to evaluate the depth of focus is one third .

均布X射线密度可获理想的成像质量

An Ideal Imaging Quality can be Obtained from the Evenly Scattering x-ray Density

数学模型的正反演计算以及实测资料的具体应用均证实这种方法与直线CT相比具有较高的成像精度和收敛速度，是一种较理想的成像方法。

The accuracy of the method is tested and verified by mathematical models and observed data .

采用重建算法对基于物理模型的测量数据进行图像重构，得到了较为理想的成像结果。

Applying the reconstructive algorithm , we have obtained preliminary images based on physical phantom .

测试完系统性能后，本文在现有的系统的基础上使用滤波反投影算法进行了初步的成像实验，获得了较为理想的成像结果。

After system performance tests , the preliminary imaging results were also provided in this paper .

松辽盆地北部兴城地区深层地质条件复杂，地震资料常规叠后时间偏移处理不能获得理想的成像效果。

Poststack time migration often fails to yield desired images because of complex deep geology in Xingcheng area in the north of Songliao Basin .

根据理想摄像机成像模型建立了二维计算机图像坐标与二维光平面坐标之间的关系，并利用单齿靶标获取标定点序列，完成对传感器系统内参数的标定。

The relationship between computer imaging coordinates and laser plane coordinates is established based on the ideal camera imaging model . A single-tooth target is adopted to generate calibration points . Then the calibration process of intrinsic parameters is done . 2 .

文章在建立理想边缘成像模型的基础上，分析研究了一般成像系统的点扩展函数与空间采样频率的关系及对图像边缘定位精度的影响，给出了边缘定位误差。

In this paper , the relationship between PSF of the normal imaging system and spatial sampling frequency is analyzed and studied as well as its effect to localization precision of image edge and the error of edge localization is given based on the imaging model of ideal edge .

在计算机上通过模拟点扩散函数（PointsSpreadFunction简称PSF）、理想几何光学成像、单色光成像，成功地模拟了DOE的成像过程。

The main works in this paper is that , by calculating Points Spread Function ( PSF ) and simulating the forming of images of monochromatic light and ideality geometrical optics on the computer , we have simulated successfully DOE imaging process .

[结论]在5种序列中，3DFS-FSPGR是理想的关节软骨成像序列；

[ Conclusion ] 3D FS-FSPGR is a favorable scan sequence to examine the OA changes of articular cartilage .

本文的研究目的在于构造一个理想的虚拟场景成像及采集环境，有效地抑制外界环境的影响，去除不可控的误差来生成准确、可靠的高精度图像。

This paper focuses on constructing an idea virtual scene imaging condition , effectively restrain the influence of outside surroundings , wiping off the uncontrolled errors to generate an accurate and reliable image .

从理想透视原理出发，推导并建立了不考虑畸变的理想摄像机成像模型。

Starting with perspective theory , the camera imaging model without thinking of distortion is derived and established .