An intensity-based non-rigid registration algorithm is discussed, which uses Gaussian smoothing to constrain the transformation to be smooth, and thus preserves the topology of images. In view of the insufficiency of ...An intensity-based non-rigid registration algorithm is discussed, which uses Gaussian smoothing to constrain the transformation to be smooth, and thus preserves the topology of images. In view of the insufficiency of the uniform Gaussian filtering of the deformation field, an automatic and accurate non-rigid image registration method based on B-splines approximation is proposed. The regularization strategy is adopted by using multi-level B-splines approximation to regularize the displacement fields in a coarse-to-fine manner. Moreover, it assigns the different weights to the estimated displacements according to their reliabilities. In this way, the level of regularity can be adapted locally. Experiments were performed on both synthetic and real medical images of brain, and the results show that the proposed method improves the registration accuracy and robustness.展开更多
大学校名的英语命名和翻译格式是有章可循的。就命名格式类型来说,英语大学校名有“X Universi⁃ty”和“University of X”两个基本格式。就命名源头而言,英语大学校名可分地名命名和非地名命名。大学校名的英语命名和翻译的基本规律是...大学校名的英语命名和翻译格式是有章可循的。就命名格式类型来说,英语大学校名有“X Universi⁃ty”和“University of X”两个基本格式。就命名源头而言,英语大学校名可分地名命名和非地名命名。大学校名的英语命名和翻译的基本规律是,如以非地名命名,一律强制性地使用“X University”格式。如以地名命名,虽然刚性语法规则允准“X University”和“University of X”两种格式,但是,柔性语用原则优先选择“Univer⁃sity of X”格式,这是个无条件的默认格式。违反此规律的用例一定另有原因。这些规律的背后是制约“名词+名词”结构的普遍性条件,植根于深层次的语言学理据。本文在此基础上还援用Kachru(1985)“三环同心圆”理论,就如何改进我国大学校名的英语命名与翻译提出了切实可行的政策建议。展开更多
基金Supported by National Natural Science Foundation of China (No60373061)Joint Programof National Natural Science Foundation of ChinaGeneral Administration of Civil Aviation of China (No60672168)
文摘An intensity-based non-rigid registration algorithm is discussed, which uses Gaussian smoothing to constrain the transformation to be smooth, and thus preserves the topology of images. In view of the insufficiency of the uniform Gaussian filtering of the deformation field, an automatic and accurate non-rigid image registration method based on B-splines approximation is proposed. The regularization strategy is adopted by using multi-level B-splines approximation to regularize the displacement fields in a coarse-to-fine manner. Moreover, it assigns the different weights to the estimated displacements according to their reliabilities. In this way, the level of regularity can be adapted locally. Experiments were performed on both synthetic and real medical images of brain, and the results show that the proposed method improves the registration accuracy and robustness.
文摘大学校名的英语命名和翻译格式是有章可循的。就命名格式类型来说,英语大学校名有“X Universi⁃ty”和“University of X”两个基本格式。就命名源头而言,英语大学校名可分地名命名和非地名命名。大学校名的英语命名和翻译的基本规律是,如以非地名命名,一律强制性地使用“X University”格式。如以地名命名,虽然刚性语法规则允准“X University”和“University of X”两种格式,但是,柔性语用原则优先选择“Univer⁃sity of X”格式,这是个无条件的默认格式。违反此规律的用例一定另有原因。这些规律的背后是制约“名词+名词”结构的普遍性条件,植根于深层次的语言学理据。本文在此基础上还援用Kachru(1985)“三环同心圆”理论,就如何改进我国大学校名的英语命名与翻译提出了切实可行的政策建议。
