一个方面是通过学习发现字符的不变特征。
给出了一种基于离散傅里叶不变特征的人脸识别方法。
A face recognition method based on discrete Fourier invariant features is presented.
信息内容所具有的不变特征使异构设备之间的互操作成为可能。
The invariability of the information contents makes it possible to interoperate between heterogeneous devices.
该地图用激光的扇区特征和视觉的比例不变特征来联合表示节点。
A novel topological map is proposed in this paper, and its nodes are represented with the visual scale-invariant features and the beam features of the laser range finder.
通过计算不变特征矩阵和模板特征矩阵的相关性对目标进行分类识别。
The targets are classified and recognized by calculating the same correlation of the characteristic matrix and the template features matrix.
提出一种基于尺度不变特征变换（SIFT）特征匹配的目标跟踪方法。
This paper presents a novel object tracking method based on SIFT(scale invariant feature transform) feature matching.
在对双色性反射模型理论分析的基础上，定义和分析了多种彩色不变特征。
In this paper we define and analyze a number of color constancies based on dichromatic reflection model.
再次，给出了利用尺度不变特征点作为导航陆标进行探测器自主着陆导航的算法。
Third, this paper presents an autonomous landing navigation algorithm taking the scale invariant feature points as the landmarks.
然后利用尺度不变特征变换(SIFT)剔除那些匹配的关键点数目少的子区域。
And Scale Invariant Feature Transform (SIFT) was employed to exclude those sub-regions with smaller matching key points.
提出一种利用尺度不变特征变换(SIFT)特征点实现对抗几何攻击的水印方案。
The image watermark scheme based on Scale Invariant feature Transform (SIFT) feature is proposed for resisting geometric attacks.
现存的基于不变特征的二维模式识别方法在目标被模糊了的情况下都无法精确识别。
The existing approaches to invariant two dimensional pattern recognition are useless when the pattern is blurred.
依据离散傅里叶变换性质，推导出离散傅里叶变换的不变特征，并将其用于人脸图像识别。
Then according to the properties of discrete Fourier transform, it deduces the discrete Fourier invariant features that are employed on facial image recognition.
提出了一种新型拓扑地图；该地图用激光的扇区特征和视觉的比例不变特征来联合表示节点。
A novel topological map is proposed in this paper, and its nodes are represented with the visual scale-invariant features and the beam features of the laser range finder.
为了恢复已失去的同步信息，提出一种基于筛选尺度不变特征估计几何攻击参数的数字水印算法。
To restore the lost synchronism, a novel method to estimate the geometric operation using sifted Scale-Invariant Feature Transform (sift) was proposed.
分析了舰船目标的几何特征和不变特征，为满足实时性要求，使用一组统一的相对矩来计算特征量。
Geometry character and invariant character of ship target is analyzed and a united relative invariant moment is used to calculate the feature to meet real-time requirements.
通过改进的SIFT(尺度不变特征变换)算法提出了一种可有效抵抗几何攻击的鲁棒数字水印算法。
An effective against geometric attack robustness of digital watermarking algorithm based on improved SIFT (Scale Invariant Feature Transform) is presented.
提出一种结合尺度不变特征变换(SIFT)特征点校正和时空域视频对象分割的视频对象水印算法。
A video object watermark algorithm using Scale-Invariant feature Transform (SIFT) features and video segmentation based on spatiotemporal information is proposed.
为增强跟踪算法区分目标的能力，算法将尺度不变特征和基于核的颜色分布特征统一用作目标的跟踪特征。
For boosting up the feature's discriminating ability, both scale invariant features and kernel based color distribution features are used as descriptors of tracked object.
针对遥感图像配准，基于尺度不变特征变换(SIFT)提出了一种在核空间中构建仿射不变描述子的方法。
A technique to construct an affine invariant descriptor for remote-sensing image registration based on the scale invariant features transform (SIFT) in a kernel space is proposed.
首先根据尺度不变特征变换方法从图像中提取关键点作为特征点，然后进行左右双目图像的特征点匹配和视差的恢复。
Then use these feature points for binocular matching thus getting distance information of the scene by the calculation of differences between match points in two images.
摘要 ：改进了传统的尺度不变特征变换（SIFT）算法，使其在进行图像匹配的同时，可以求取出物体的旋转角度。
Abstract : The Scale-invariant Feature Transform(SIFT) algorithm was improved in this paper, which could match two pictures and could also compute the object rotation angles in the pictures.
摘要：针对图像特征提取与匹配的适应性和准确性的问题，本文提出将尺度不变特征变换算法应用到图像特征点提取与匹配。
Abstract: in order to improve the stability and reliability of image matching, this paper applied the scale invariant feature transform algorithm to image matching.
该方法通过提取曲线的相对不变特征量，构建数据结构，细致地处理匹配过程的细节，对轮廓曲线的部分匹配有着较为满意的匹配效果。
The result of this method is content to contour line matching by building variant feature quality, constructing data structure, dealing with matching process's detail.
这避免了“特征蔓延”，即需求工作保持不变甚至增加。
This avoids "feature creep", in which requirements work remains constant or even increases.
天气在变，优秀企业的特征不变。
The weather changes; the characteristics of good businesses don't.
这允许所有委派方法的特征符保持不变，因而也允许通过相同机制来抛出任何验证异常。
This allows the signature of all of the delegate methods to stay the same, and therefore also allows any validation exceptions to be thrown through the same mechanism.
目前，Jackson的结论仍然不变：水井中的是地下深处高热生成的甲烷，有自己的化学特征，与常年渗漏的沼气不一样。
So far, Jackson's results are consistent: What's in peoples' Wells is deep gas, created in high heat with its own chemical signature. It's not like the methane in this old seep.
通过将对数极坐标和傅立叶变换结合，完成旋转不变的傅立叶纹理特征提取。
In this paper, we incorporate Fourier transform with Log-Polar transform to achieve rotation invariant texture analysis.
由于指纹具有唯一性和终身不变性，正成为近年来应用最为广泛的生物特征。
Owing to their uniqueness and immutability, fingerprints have become the most widely used biometric feature in recent years.
由于指纹具有唯一性和终身不变性，正成为近年来应用最为广泛的生物特征。
Owing to their uniqueness and immutability, fingerprints have become the most widely used biometric feature in recent years.
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