提出了一种基于几何不变性和BP网络的二维目标识别算法。
A 2d object recognition algorithm based on geometry invariant and BP Network.
本文论述用无极速度图检查平面结构几何不变性的原理和方法。
This paper presents non-polar velocity-diagram method that determines the velocities of the planer mechanism with many degrees of freedom.
该文证明了这样抽取的代数特征具有一些重要的代数和几何不变性。
This paper proved that this algebraic feature has some important properties of algebraic and geometric invariance.
该表示形式中没有权因子和额外的控制参数，而且具有几何不变性、仿射不变性等良好性质。
The representation has no weight factors or control parameters, and it is geometric and affine invariant.
采取的主要方法有：1）利用图像中的局部最稳定特征点生成具有几何不变性的局部特征区域；
The main methods include:1) Invariant local feature regions are generated using locally most stable feature points of images;
小波变换不具有几何不变性，因此，小波域水印对抗几何攻击是一个十分困难和富有挑战性的课题。
The wavelet transform has no ability to resist to geometric distortion, so the wavelet domain watermarking resisting to geometric distortion is a very difficult and challenging subject.
采取的主要方法有：1）利用图像中的局部最稳定特征点生成具有几何不变性的圆形特征区域，用于水印的同步；
The main methods adopted include:1) watermark synchronization is achieved by invariant local circular regions which can be generated using image locally most stable feature points;
采取的主要方法有：1）利用图像中的局部最稳定特征点生成具有几何不变性的圆形特征区域，用于水印的同步；
The main methods adopted include:1) watermark synchronization is achieved by invariant local circular regions which can be generated using image locally most stable feature points;
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