1) directional projection feature
方向投影特征
1.
To address the problem of extracting feature of similar objects,the Radon transform method can extract directional projection features which reserve enough identification information.
针对有细微差异的形似物体的比较提出了用Radon变换来提取能保留足够识别信息的方向投影特征 ,并用小波描述算子对该特征向量进行压缩。
2) special projection direction set
特定投影方向集
3) projection characteristic
投影特征
1.
This paper presents a new method which combines the traditional projection characteristic and wavelet multiresolution analysis.
设计了一种将传统的投影特征和小波多分辨分析相结合的字符特征提取方法,将直观易得但细分能力较差的字符投影信号,进行不同尺度下的小波多分辨分解,分别在获得的近似成份和细节成份中提取有效的特征量。
4) projection profiles
投影特征
1.
A novel approach to off-line Chinese signature verification is proposed based on projection profiles and discrete wavelet transform(DWT).
提出了一种基于投影特征和离散小波变换(DWT)的脱机中文签名鉴定的新方案。
2.
Considering that the projection profiles for feature extraction are very simple, the scheme chooses a suitable membership function to obtain the objective function and dynamic programming is carried out.
鉴于签名图像具有投影特征提取简单的特点,该方案通过选择合适的隶属度函数,归纳出动态匹配所必需的目标函数式,并给出了相应的求解方法。
5) projection character
投影特征
1.
The projection character from two-projection drawing of three-dimensional combination can be constructed from the two-projection of combination on the basis of the point of projection type of body surface and relative position of borderline frame.
针对组合体二个投影视图可构建多种组合体形状的问题进行研究,从体表面的投影类型及相邻线框相对位置出发,分析得出组合体二个投影图可构建多种三维形体的组合体二个投影图的投影特征,总结出多种组合体形状数量的确定公式及不合理组合形式的确定条件。
2.
The projection character that manifold two-projection drawing of three-dimensional combination can be constructed from the two-projection of combination is analyzed from the point of projection type of body surface and relative position of borderline frame.
针对组合体二个投影视图可构建多种组合体形状的问题进行研究,从体表面的投影类型及相邻线框相对位置出发,分析得出组合体二个投影图可构建多种三维形体的组合体二个投影图的投影特征,总结出多种组合体形状数量的确定公式。
6) projection
[英][prə'dʒekʃn] [美][prə'dʒɛkʃən]
投影特征
1.
Wavelet transform and projection were referred to after wavelet transform projection and sequential similarity detection algorithm(SSDA) were applied to the low frequency part of the image to get a set of potential matching points, and then matching operation was done on the original image to get the right position.
提出了一种基于小波变换和投影特征的图像匹配的快速算法 先在若干级小波变换的低频图上利用投影特征、序贯相似性算法等手段得到一个可能的匹配点的集合,然后对该集合上的点在原图上作匹配运算,得出准确匹配位置 该算法大大提高了运算速度,同时又保持了匹配的精度,可以满足实时性的要
2.
Based on image matching model,wavelet transform and projection,a novel and acceler- ated image matching algorithm for dynamic object is proposed.
基于图像匹配模型,在小波变换和投影特征的基础上,提出对动态目标进行匹配的快速算法。
补充资料：滤波反投影或卷积反投影
滤波反投影或卷积反投影
影像学术语。当代影像学设备进行影像重建的数学方法。在直接用扫描后所获得的投影轨迹剖面图反投影重建出的CT图像中，无法避免角度卷入条纹伪影(angular aliasing streaks)造成的模糊和失真。这种现象与被扫描层面的空间频率中高频信息的损失有关。使用一种精密的数学方法去除这种模糊。称为“展现”(unfolding)或去卷积(deconvolution)，即在反投影前使用一种数学的“滤器”或卷积函数对原始数据进行修正，然后再进行反投影。两步数学处理过程合称为滤波(修正后)反投影或卷积(后)反投影。这种方法的优点是处理过程简单，速度快，所得图像逼真、清晰。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条