优化摄像机-ChArUco几何在站立马的运动补偿CT:一个CT-动机的台面研究.
Cosimo Aliani1, Cosimo Lorenzetto Bologna2, Piergiorgio Francia1
1Department of Information Engineering, University of Florence, Via di Santa Marta 3, 50139 Florence, Italy.
Sensors (Basel, Switzerland)
|February 27, 2026
概括
使用ChArUco信托的外部光学跟踪可以在站立的马类计算机断层扫描 (CT) 过程中补偿运动. 最佳的摄像机-ChArUco几何平衡精度和精度,以改善兽医CT中的图像质量.
科学领域:
- 兽医成像技术 兽医成像技术
- 生物医学工程 生物医学工程
- 有光学跟踪,可以追踪.
背景情况:
- 站立马的计算机断层扫描 (CT) 被姿势摇摆所挑战,导致运动工件和图像质量下降.
- 采用CharUco信托的外部光学跟踪为CT成像中的运动补偿提供了一个低成本的解决方案.
- 关于摄像机标记物几何学影响如何影响估计准确度和精度的定量数据有限.
研究的目的:
- 描述摄像机-ChArUco配置对站立马CT运动补偿姿势估计性能的影响.
- 为改善CT图像质量提供关于最佳摄像机和标记器放置的定量指导.
主要方法:
- 一个基板研究利用RGB图像和OpenCV ChArUco检测来估计刚性相机到板的转换.
- 实验系统地改变了视角,工作距离和获取协议 (连续与循环重新定位).
- 使用步进电机旋转阶段和绳子测量确定了基本真相;性能通过平均绝对误差和标准偏差进行评估.
主要成果:
- 与连续收购相比,周期性重新定位的变化没有显著增加,这支持了视图逐视图的抽样.
- 视角引入了准确度-精度的权衡:正面视图的偏差较低但变化更高,而斜视图减少了动但增加了偏差.
- 工作距离的增加降低了重复性,特别是在深度估计方面.
结论:
- 适度斜视点,有限的工作距离和足够的图像足迹是相机/标记器放置的建议.
- 研究结果为优化视觉追踪系统的临床前指导提供了可用于站立马匹CT运动补偿的指导.
- 这项研究有助于提高兽医CT应用中的图像质量.
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