投影矩阵

First, an initial projection matrix is obtained through homography between an image and a scene plane. The homograph matrix between two images, i. e., the image plane and the scene plane, can then be calculated from matching points of these two images. Thus the projection matrix of every next frame can be calculated from homograph matrix between the current image plane and the previous one. Registration of virtual objects is finally completed.

根据这个原理，首先通过一个景物平面和图像之间的单应得到初始状态相机的投影矩阵，然后对后面每帧图像和前一帧进行自然特徵点匹配，通过匹配点对计算出图像之间以及图像与景物平面的单应关系，由此就可以得到每一帧图像对应的相机的投影矩阵，从而完成虚拟物体的注册。

This invention relates to MIMO test method in a multi-user MIMO radio communication system including: estimating the channel matrixes of all users at the base station, computing an orthogonal projecting matrix M of the interference matrix of each user and transmitting M to each user periodically, receiving data sent by the base station at the user end and getting the orthogonal projecting matrix M from the received data, transforming the MIMO test of a desired user to the minimum value of a K-element secondary convex function, in which, K expresses the number of sending antennas and getting estimation of the test data by a ball test method.

一种多用户多输入多输出无线通信系统中的MIMO检测方法，包括步骤：在基站估计所有用户的信道矩阵；计算每个用户的干扰用户矩阵的正交投影矩阵M，并将每个用户的正交投影矩阵M定期发送给每个用户；在用户端接收基站发送的数据，并从接收的数据中得到正交投影矩阵M；利用正交投影矩阵M将期望用户的MIMO检测转化为K元二次凸函数的极小值，其中K表示对期望用户而言，发送天线的个数；利用球检测的方法，得到检测数据的估计。

For example, one can use QR decomposition to find the orthogonal matrix B, or use the orthogonal projection matrix of A as B.

例如，人们经常使用的QR分解方法找到正交矩阵B，更直接地，B可以取为矩阵A的正交投影矩阵。

Schur-OLPP introduces Schur decomposition in Locality Preserving Projections to get the orthogonal vectors and extracts discriminant features.

该方法在保局投影的基础上引入Schur分解，求取最佳正交投影矩阵，充分提取样本的判别特征。

By using generalized projection matrix, conditions are given on the scalars in the three term-memory gradient direction to ensure that the three term-memory gradient projection direction is a descent direction. A new three term-memory gradient projection method for nonlinear programming with nonlinear equality and in-equality constraints is presented.

利用广义投影矩阵，对求解无约束规划的三项记忆梯度算法中的参数给一条件，确定它们的取值范围，以保证得到目标函数的三项记忆梯度广义投影下降方向，建立了求解非线性等式和不等式约束优化问题的三项记忆梯度广义投影算法，并证明了算法的收敛性。

Because the projection matrix errors have been considered in the total-least square algorithm, this method is helpful for obtaining a better solution under this circumstance.

由于这种重建方法在其推导过程中已经考虑到投影矩阵中存在误差这一事实，因此，这种方法对于减小投影矩阵误差对重建结果的影响无疑是有益的。

The reconstruction algorithm of temperature field based on series expansion is given. The linear equation of weights matrix, image matrix, and projection matrix is established.

提出基于级数展开法的温度场重建，建立权因子矩阵、图像矩阵和投影矩阵之间的线性方程。

The main contents of this dissertation are outlined as follows,(1) A novel data classification algorithm based on matrix projection is presented.

指出Crowe提出的矩阵投影算法在数据分类中存在由于投影矩阵不唯一，导致已测可校正数据分类不彻底的缺点。

A fast and real-time algorithm to obtain some vectors of the projection matrix is proposed in this dissertation to solve the conflict of time cost by matrix obtainment and memory occupied by matrix, and speed the iterative algorithm.

作者根据扇形扫描几何的对称性和重叠性，提出了一种快速实时获取投影矩阵分量的方法，较好地解决了获取投影矩阵所需速度和存放其所占内存空间的矛盾，提高了迭代重建算法的速度。

Be in foregone at least 6 not in all the dimensional coordinate of noodle and corresponding image coordinate, use linear algorithm to beg solution to go out nonlinear the umbriferous matrix of distortion model, undertake with the umbriferous matrix after amending three-dimensional rebuild.

在已知至少6个不共面点的空间坐标及对应的图像坐标，利用线性算法求解出非线性畸变模型的投影矩阵，用修正后的投影矩阵进行三维重建。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。