工业CT系统旋转中心定位方法分析-控制工程专业论文.docxVIP

重庆大学 重庆大学硕士学位论文 英文摘要 PAGE PAGE IV precision of the method is still much higher than other methods when the image SNR is low or there are ring artifacts or crosstalk artifacts. So the method proposed in this dissertation can accurately position the image reconstruction of rotating center and has stronger adaptability. Keywords: Industrial computed tomography, Projection, Spatial resolution, Point spread function, Rotation of center 重庆大学硕 重庆大学硕士学位论文 目 录 目 录 中文摘要········································································································ I 英文摘要······································································································· II HYPERLINK \l _bookmark0 1 绪 论 1 HYPERLINK \l _bookmark1 1.1 课题的研究背景 ··························································································1 HYPERLINK \l _bookmark2 1.1.1 工业 CT 系统简介 1 HYPERLINK \l _bookmark4 1.1.2 课题研究现状 ························································································3 HYPERLINK \l _bookmark5 1.2 课题研究意义 ·····························································································4 HYPERLINK \l _bookmark6 1.3 论文的研究内容与结构安排 ···········································································5 HYPERLINK \l _bookmark7 2 CT 系统旋转中心定位方法 6 HYPERLINK \l _bookmark8 2.1 CT 系统图像重建原理 6 HYPERLINK \l _bookmark9 2.1.1Rand 变换 6 HYPERLINK \l _bookmark10 2.1.2 图像重建 ······························································································6 HYPERLINK \l _bookmark11 2.1.3 第Ⅲ代 CT 扫描模式 7 HYPERLINK \l _bookmark12 2.1.4 CT 系统旋转中心 8 HYPERLINK \l _bookmark13 2.1.5 投影正弦图及其性质 ···············································································9 HYPERLINK \l _bookmark16 2.2 旋转中心偏移对图像质量影响 ······································································ 11 HYPERLINK \l _bookmark17 2.3 迭代校正法 ································