几何变换

数字图象几何变换的B样条算法和硬件实现

B spline algorithm for geometric transformation of digital image and hardwired implementation

三维物体的几何变换及VRML描述

Geometric Transformation of Three dimension Body and VRML Description

图像几何变换的理论及MATLAB实现

Theory and Implementation in MATLAB for Image Geometry Transform

有些时候，则需要几何变换后的RBF中心。

Sometimes , we need the transformed RBF centers .

一种抗几何变换攻击的MPEG-4视频对象水印方案

MPEG-4 Video-Object Watermarking Scheme Resistant to Geometry Transformation Attacks

当使用RBF隐式曲面时，可能需要对它进行几何变换。

When we use a Radial Basis Function ( RBF ) implicit surface , we may need to transform it .

通过对具有解析解的无限长导线二维场的计算，验证了方法和所编程序的正确性，并将几何变换法与截断法在计算精度、CPU时间及计算机内存方面做了比较。

By calculating a 2d open boundary field of an infinite length lead , the geometric transformation method is proved to be correct .

IFS码几何变换在图形处理中的应用

Application of IFS Codes Geometrical Conversion in Processing Picture

由于双平面X射线造影系统只能提供两幅有限的投影数据，冠状动脉树的三维重建在匹配、优化几何变换矩阵等方面存在困难。

The purpose of this study is to provide a 3D reconstruction of the skeleton of the coronary artery tree from two X-ray angiograms acquired on a biplane angiographic system .

在这种情况下，如果仍然使用传统算法，就需要同时保持初始的和几何变换后的RBF中心。

In these cases , if we still use the conventional algorithm , we need to keep both the initial and the transformed RBF centers .

Vandermonde卷积公式统一形式及其相应超几何变换

A unified formula of Vandermonde identities and some hypergeometric transformations

本论文创新地将RBF隐式曲面引入到基于图像的建模、极小曲面问题等领域，并研究了RBF隐式曲面的几何变换问题。

This paper innovatively introduces the RBF implicit surface to the image-based modeling , minimal surface problem , and study on the geometric transformation of RBF implicit surface .

Sprite编码技术将图像的镶嵌和图形的几何变换应用到压缩中，能有效地描述背景等一些特定的图像。

Mosaic and transformation are used in Sprite coding technology , and describe specialized image such as background effectively .

传统的RBF隐式曲面几何变换算法是：在给定点使用逆变换，然后用逆变换后的点，在原函数中计算函数值。

The conventional algorithm to transform an RBF implicit surface is to apply inverse transformation to the given point and to evaluate the original function at the inversely transformed point .

针对SIMD计算机上的数字图像的几何变换问题，提出了一个新颖的基于阵列平移的数据并行实现方法。

This paper discusses the geometric operations on SIMD computer , proposes a novel data parallel algorithm based on PE-array shift .

在寻找最优几何变换参数时，采用峰值信噪比（PSNR）作为参考图像和浮动图像的相似性测度。

When searching the optimal geometric transform parameters , peak signal-noise ratio ( PSNR ) was selected as the similarity measure between the reference and floating images .

这种方法的基本思想是通过修改图象的IFS码而实现对该IFS的吸引子（原图象的逼近）进行几何变换。

Using this method to geometrically transform images is to transform the fractal attractor , approximation of the original image , of the corresponding IFS by altering the IFS coefficients .

提出了实现图象几何变换的迭代函数系统（IFS）参数修改法，导出了实现图象平移、旋转和缩放的IFS参数变换公式。

A novel image geometry transformation method based on modifying IFS coefficients is proposed . Formulas for modifying IFS parameters to translate , to rotate and to dilate images are presented .

并且通过在DFT中频区域一个圆环上嵌入模板以及对一个限定区域不变质心的提取，实现在水印检测前估算和校正图像所经历的几何变换。

Especially , the geometric transformation could be corrected before the watermarking detection , owing to embedding a template in a circle of middle frequency in DFT and extracting a invariant centroid from a restricted area inside the image .

将数字水印信息隐藏在DGT的低频系数中，在水印的检测算法中采用了几何变换及与其相配套的匹配技术，将有几何形变的图像反变换恢复，再通过DGT进行检测。

In the proposed watermark-checking algorithm , the geometric transforms and corresponding matching method are applied for geometric transformed images in order to recover them for watermark-checking .

同时包含了填充，图形几何变换，填充以及裁剪等功能。-UseVS6。

Also includes the filling , graphics geometric transformation , filling and cutting functions .

水印算法充分利用SIFT特征点对图像旋转、缩放和平移等几何变换具有不变性的特点，构造稳健的SIFT局部不变特征区域，水印的嵌入和检测就在这些局部区域的小波变换域中进行。

The watermarking algorithm makes full use of the SIFT feature points , which are invariant to RST transformations , to construct local feature areas . And the embedding and detection of watermarking are in the wavelet-domain of these areas .

钻井布局的几何变换模型

Mathematical Model of Arrangement of Drilling Wells Based on Geometric Transformation

以数字搜索树表示的二值图象的几何变换

Geometrical transformation of binary images represented by digital search tree

几何变换归一化在盲图像水印算法中的应用

Application of Normalized Geometric Transformation in Blind Image Watermarking Algorithm

抗几何变换的小波域自适应图像水印算法

Image-adaptive Watermarking Algorithm Robust to Geometric Distortion in DWT Domain

图像数字水印抗几何变换方法的研究

Research on Method Against Geometrical Distortion of Image Digital Watermarking

标准牙冠计算机三维图形的重建及其空间几何变换的研究

3-D reconstruction of standard tooth crown and related shape deformation

机器人足球中关键目标坐标的几何变换

Geometric Transformation of the Key Target Coordinates of Robot Soccer

几何变换攻击一直是许多数字图像水印的薄弱环节。

For many digital image watermarks , geometric distortions are their weakness .