| 摘要: | 條紋投影輪廓測量方法是非接觸非破壞之三維測量重要技術。然而，若是待量測物體的體積較大有著無法或是不易移動等測量情形，例如:大型機具或是器件與設備、不可被破壞之考古學遺跡、炸彈等易爆物之拆除或其他重大災害現場的重建……等，三維測量技術的精密度變得十分重要。再者，運用紋投影輪廓儀進行物體三維表面測量時，精確度往往會受到實驗環境、物體表面特性以及條紋擷取過程中光學器件等相關參數導致的非理想影響，例如:不穩定的環境光、設備參數校正、或是物體本身材質的表面太強或是太弱反射因素等影響，導致量測相位誤差，影響三維表面量測重建的精密度。有鑑於此，本文提出動態條紋投影輪廓量測系統，利用具有移動能力系統架構，設計具有動態校正能力之條紋投影架構與演算法設計，克服上述不易與不理想拍攝難題，希望以更精準的拍攝與校正參數進行物體三維表面量測，以消減三維表面量測誤差。
經由本文實驗結果，利用所設計無線、可移動之動態三維重建動態條紋投影輪廓量測系統，能夠有效地達成無法或是不易移動物體的三維表面量測，並且消減了環境或是物體本身材質的表面太強反射光線影響所帶來的三維表面相位量測誤差。論文中亦透過演算法設計，無需再重新拍攝與投影條紋擷取，以現有設備以及條紋狀態進行條紋投影之相位補償工作，提升相位建立精確度獲得較佳的物體三維表面分佈，達成動態條紋投影輪廓量測系統拍攝及三維重建工作。
Fringe projection profilometry (FPP) is one of important, non-contact and non-destructive optical 3D profile measurement technologies. However, if the size of the object to be measured is large, difficult or other measurement situations which is not easy to move (for example: large machinery or devices and equipment, archaeological remains that cannot be destroyed), demolition of explosives (such as: bombs, or other major disasters reconstruction) ...etc., the precision of 3D measurement technology becomes very important. Furthermore, when using the fringe projection profilometry to measure the 3D surface of objects, the accuracy is often affected by non-ideal effects caused by experimental environment, surface characteristics of objects, and related parameters such as optical devices in the fringe extraction process (such as: unstable ambient light, calibration of equipment parameters, or the reflection of the the measured object itself is too strong or too weak to reflect, etc., which lead to phase errors in measurement and affect the accuracy of 3D surface reconstruction. In view of this, this paper proposes a dynamic fringe projection profile measurement system. Using the proposed system architecture with mobile capability, the fringe projection architecture and algorithm design with dynamic correction capability are designed to overcome the serious mentioned and fringe projection problems. It is hoped that the three-dimensional surface measurement of objects can be performed with more accurate and corrected parameters to reduce the phase errors.
The experimental results of this paper demonstrate that the proposed wireless and movable dynamic fringe projection 3D profile measurement system can be used to effectively, it also achieved accuracy 3D surface measurement for objects that cannot be easily moved. Moreover, the three-dimensional surface phase measurement error caused by the influence of the environment or the surface of shiny object itself due to the strong reflection of light is reduced. In the paper, we also design the phase compensation algorithms and that there is no need to re-project the project fringes to measured objects, just use the existing equipment and captured fringes to perform the phase compensation of fringe projection. By improving the phase accuracy of measurement, three-dimensional surface distribution of the measured objects can be obtained accurately. Three-dimensional shape measurement and calibration for dynamic fringe projection measurement system can be achieved. |
