1·Projective transformation and affine transformation are essential in the image transformation.
仿射变换和透射变换是两种基本的图像变换。
2·The advantages of the method of calculating the orthographically projective transformation are concluded.
③简要分析这种计算方法的特点。
3·Then, according to the base coordinate of locating rod, gain the coefficients of projective transformation.
然后根据定位杆的基准坐标，得到该层的射影变换算子T；
4·In this paper we propose a method of projective transformation from pitch surface to cutter surface for studying face mill cutters.
文中借助于形象思维把齿轮的啮合几何化，提出了一种研究按滚切法工作的切齿刀具的方法，从节曲面到齿曲面的射影变换。
5·The algorithm can adapt to object recognition, invariant not only under rotation? Scaling? Translation, but under affine and projective transformation.
算法不仅能适应目标物体在旋转、缩放、平移变换下的不变性识别。而且能适应仿射及射影变换下的不变性识别。
6·In general cases, the former can be approximated well to the latter, and it leads a new way in pattern recognition under the projective transformation.
在多数情况下，透射变换可以用仿射变换很好地近似，这为透射变换的目标识别指出了一条新的途径。
7·The geometric projective transformation of lens was analyzed, and the distortion coefficients of lens were calibrated for realizing high-precision measurement.
分析了镜头的几何投影变换关系，标定了镜头的畸变系数，达到高精度测量目的。
8·Based on invariance of the cross-ratio in projective transformation, this paper designed a gray artificial landmark for vision-based recognition by shape information.
本文以射影变换下的复比不变性为理论基础，设计了一种可基于形状信息进行视觉识别的灰度人工路标。
9·Some existing algorithms are used and some changes are made to achieve a good result during projective transformation. Then the result of test is analyzed and discussed.
在投影变换的过程中对已有算法进行了改进以达到较好的效果，并对实验结果进行了分析和讨论。
10·By using a certain projective transformation, a smooth planar parametric curve with any function may be changed into a new planar parametric curve of order 3 in a rational form.
本文讨论了任意函数类的一条光滑平面参数曲线段，在适当的射影变换下，可以变为相应的有理形式的平面三阶参数曲线。