geometric distortion

geometric distortion的基本解释

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几何畸变[失真]

与geometric distortion相关的网络例句 [注：此内容来源于网络，仅供参考]

Thismethod adopted affine transformation model and a Lie derivative-based analytical algorithm.We introduced the process and characters in extracting information of biological visionsystem, studied the feasibility of the generalized Gabor function used as receptive fieldfunction in extracting information and analyzed affine transformation group and Liederivatives. Finally, we deduced the mathematical denotation for Lie derivatives, i.e. theinfinitesimal generator of the geometric distortion in affine transformation.

对生物视觉信息提取的过程及特点进行了介绍，其中主要研究了广义Gabor函数作为感受野函数提取初级视觉信息的可行性；对仿射变换作为外界图像信息在视觉成像系统上的投影模型的原理进行了初步讨论；对Lie变换群微分算子用于提取仿射变换不变量的分析方法作了剖析，并推导了该方法中关键部分——仿射变换Lie微分算子的具体表达式，也就是几何变形无限小微分算子的计算表达式，使下一步编程实现该方法成为可能。

Experimental results show that our algorithm reduces the geometric distortion effectively and ensures the validity of the conformal mapping.

实验结果表明，该算法通过优化切割线和参数域边界有效地降低了三角形形状扭曲，并保证了参数化结果的合法性。

The method first embeds watermark into the geometric invariant Fourier-Mellin domain of an image to weaken the geometric distortion, brought by printing process, of the watermark in presswork, and the image is then used to create presswork via a legal printing process. Secondly, the method rectifies rescanned image from the presswork by using Radon transformation and the embedded watermark in it is detected. Since there is an obvious difference between the destruction degrees of the watermark caused respectively by legal and pirated printing process, we can judge whether a copy of presswork is valid or not just by computing the ratio of the successfully derived watermark and comparing it with a predefined threshold.

该方法先将水印嵌入到具有几何不变性的Fourier-Mellin域中，以削弱正版印刷过程中的几何失真对水印的破坏；再利用Radon变换对由扫描印刷品所获得的图像进行矫正，并从图像中提取嵌入的水印信息；由于正版和盗版印刷过程对水印的破坏程度区别明显，该方法最终通过计算水印提取的正确率来度量这种破坏，并将其与预先制定的阈值进行比较来判定印刷品的正伪。

与geometric distortion相关的网络解释 [注：此内容来源于网络，仅供参考]

ghost image：有鬼影的影像

geometric distortion 几何式变形,指用广角镜时边沿的影像产生的变形 | ghost image 有鬼影的影像 | giant enlargement 巨幅放大法

heliogravure：影写版印刷,照相凹版

影写本apograph | 影写版印刷,照相凹版heliogravure | 影像几何畸变image geometric distortion

geometric mean distance：几何平均距

图形失真 geometric distortion | 几何平均距 geometric mean distance | 几何平均半径 geometric mean radius