1) projection technigues
投影方式
2) projection method
投影方法
1.
Approximate projection methods for incompressible flow on nonstaggerd grids;
非交错网格上不可压流动中的近似投影方法
2.
Third-order projection method for solving the incompressible Navier-Stokes equations;
求解不可压Navier-Stokes方程的三阶精度投影方法
3.
Because of the decoupling of the velocity and the pressure computation,the projection method is much more efficient than the fully coupled procedures.
在过去的20多年中,投影方法通过速度和压力的解耦计算,获碍了比全耦合方法更高的计算效率,这个显著优点使之得以广泛应用。
4) variance projection
方差投影
1.
Then by using edge detection, Hough transformation, template matching and variance projection, facial features such as eyes, nose and mouth are located quickly and effectively.
通过区域增长从人脸图像中分割出人脸 ,再利用边缘检测、Hough变换、模板匹配和方差投影技术可以快速有效地提取出人脸面部器官眼睛、鼻子和嘴巴特征 。
2.
Finally the center of eye can be precisely given by variance projection and binaryzation.
首先利用一种多尺度自商图方法消除人脸图像的光照影响;然后综合运用形态学操作的开闭运算提升眼睛区域特征并采用相关系数法获得眼睛粗定位,对开闭眼不敏感;最后对粗定位区域进行方差投影并二值化后获得精确的眼睛中心点。
5) projection equation
投影方程
1.
Conclusion The results show that the conditional expectation is the only projection mapping that meets the projection equation.
结论表明在L2(Ω,F,P)空间上,条件数学期望E(ξ|R)是唯一满足投影方程的投影映射。
6) Directional Projection
方向投影
1.
Skew detection method for bill image based on directional projection;
基于方向投影的票据图像倾斜检测方法
2.
According to the feature that the Stored-Grain Insects images haven t the obvious lines,a new skew detection method based on directional projection is presented,using Bresenham s integer only line drawing algorithm.
针对无明显的直线特征的仓储害虫图像,提出了一种基于整数Bresenham算法求方向投影值,利用方向投影值检测图像的倾斜角度的方法。
3.
According to the OCR ID Document image containing the OCR character region,a new skew detection method based on the directional projection and the within-group measure of dispersion has been presented.
针对包含有OCR字符区域的OCR证件图象,提出了一种基于方向投影和类内散度的OCR证件图象的倾斜检测算法。
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