3D absolute shape measurement of live rabbit hearts with a superfast two-frequency phase-shifting technique
3D absolute shape measurement of live rabbit hearts with a superfast two-frequency phase-shifting technique
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DOI：
10.1364/oe.21.005822
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发表时间：
2013-03-11
期刊：
影响因子：
3.8
通讯作者：
Zhang, Song
中科院分区：
文献类型：
--
作者：
Wang, Yajun;Laughner, Jacob I.;Zhang, Song
本文提出了一种双频二进制相移技术来测量跳动的兔子心脏的三维（3D）绝对形状。由于心脏表面的对比度较低，投影仪和相机必须保持聚焦，这对任何现有的测量精度较低的二元方法提出了挑战。为了克服这一挑战，本文提出利用最佳脉宽调制（OPWM）技术来生成高频条纹图案，并利用误差扩散抖动技术来生成低频条纹图案。此外，本文将表明，与用红光或绿光产生的条纹图案相比，用蓝光产生的条纹图案可提供最佳质量的测量。对于每分钟 180 次心跳的兔子来说，高质量测量的最低数据采集速度约为 800 Hz。 (c) 2013 年美国光学学会
This paper presents a two-frequency binary phase-shifting technique to measure three-dimensional (3D) absolute shape of beating rabbit hearts. Due to the low contrast of the cardiac surface, the projector and the camera must remain focused, which poses challenges for any existing binary method where the measurement accuracy is low. To conquer this challenge, this paper proposes to utilize the optimal pulse width modulation (OPWM) technique to generate high-frequency fringe patterns, and the error-diffusion dithering technique to produce low-frequency fringe patterns. Furthermore, this paper will show that fringe patterns produced with blue light provide the best quality measurements compared to fringe patterns generated with red or green light; and the minimum data acquisition speed for high quality measurements is around 800 Hz for a rabbit heart beating at 180 beats per minute. (c) 2013 Optical Society of America