荧光分子断层成像系统需要获取成像物体的三维表面轮廓,用于荧光团浓度重建的前向模型,本文提出了基于结构光方法的成像物体的三维表面轮廓重构.首先利用8比特格雷码对图像进行编码,再将编码后的图像投射到成像对象,这时经成像物体的三维表面轮廓调制后的图像再通过二值化、解码、插值和轮廓重构等步骤最后输出三维表面轮廓.圆柱物体和小鼠实验表明,该方法可以较好地重构成像物体的三维表面轮廓,并且具有硬件系统简单、易实现等优点.

1. Ntziachristos V,Ripoll J,Wang Lihong V,et al.Looking and listening to the light:the evolution of whole-body photonic imaging.Nature Biotechnology,2005,23(3):313-320.
2. Song Xiaolei,Bai Jing.Development of fluorescence diffuse tomography[J].Biomedical Engineering Foreign Medical Science,2005,28(2):70-75.
3. Vasilis Ntziachristosa,Ralph Weissleder.Charge-coupled-device based scanner for tomography of fluorescent near-infrared probes in turbid media[J].Med Physics,2002,29(5):803-809.
4. Junjie Yao,Gang Hu,Shuhua Yue,et al.A 3D-Surface Reconstruction method used in the Fluorescence Molecular Tomography of the small animals.Chinese Journal of Biomedical Engineering,2008,27(3):360-365.
5. Valkenburg RJ,McIvor AM.Accurate 3D measurement using a structured light system.Imaging and Vision Computing,1998,16(2):99-110.
6. Kai Wolf,Dieter Roller,Dirk Schfer.An approach to computer-aided quality control based on 3D coordinate metrology.Journal of Materials Processing Technology,2000,107(1-3):96-110.
7. Giovanna Sansoni,Franco Docchio.Three-dimensional optical measurements and reverse engineering for automotive applications.Robotics and Computer-integrated Manufacturing,2004,20(5):359-367.
8. Dietrich Paulus,Matthias Wolf,Sebastian Meller,et al.Three-dimensional computer vision for tooth restoration.Medical Image Analysis,1999,3(1):1-19.
9. Sansoni G,Docchio F.3-D optical measurements in the field of cultural heritage:The case of the Vittoria Alata of Brescia,IEEE Transactions on Instrumentation and Measurement,2005,54(1):359-368.
10. Meneses D,Valderrama AZ.3D reconstruction of complicated objects by Gray Code method.Proceedings of SPIE,2004,5622:1316-1321.
11. Tsai RY.A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses.IEEE journal of Robotics and Automation,1987,3(4):323-344.