| 摘要: | 光學三維成像與檢測是目前工業4.0時代國內外產業所需高速而非接觸、非破壞性的主要感測技術與發展驅勢，其中條紋投影分析是一種運用光投射週期條紋於三維物體而產生條紋形變，進而解析出物體輪廓高度的光學三維量測技術，主要應用於具漫射表面物體的光學量測。數位全像術則基於數位化波前再現方式具可完整記錄與重建物體三維資訊的能力，成為目前重要的光學三維成像技術與精準量化分析的新利器，其中可應用於具鏡射表面物體的反射式三維成像與輪廓量測。隨著複雜工業化製程與物件之需求，其檢測物體往往同時具有漫射與鏡射的複合表面組合而成，然而，對於具三維複合表面物體所需快速而有效的全場成像與量測方法目前仍付之闕如!有鑑於此，本人暨臺師大合作團隊基於先前研究結果，研擬本項計畫主題為「整合同調條紋投影暨數位全像術於三維複合表面成像之研究」，全程計畫預定以兩年期間分別進行同調條紋投影與數位全像術之三維複合表面成像解析及其影像重建原理、模擬、實驗、系統實作與實例應用等相關研究工作，並將兩者整合運用以解決其間高動態範圍條紋失真、條紋整形、光斑雜訊、影像套合等關鍵性問題，達成高質量的全場三維複合表面成像與檢測之目標。第一年度計畫研究重點：同調條紋投影分析於高動態範圍表面之三維成像，主要係運用本人日前所發表「條紋整形」方法於同調照射下條紋投影成像之光學條紋投影與取像架構及其影像處理方法，並應用於立體實物之三維漫射表面成像與輪廓量測研究工作；第二年度計畫研究重點：三維複合表面之成像，主要將前一年同調條紋投影光學架構整合於數位全像系統，並對具漫射與鏡射區域進行影像對位疊合等影像分析與處理，達成完整全幅的三維複合表面影像重建與輪廓量測。綜合而言，本計畫工作之主要價值在於創新整合條紋投影與數位全像兩模式及其資訊處理方法，以克服目前三維物體複合表面複雜漫射與鏡射的光學偵測與記錄限制，進而達成全場光學三維成像與檢測應用新模式。
Optical three-dimensional (3D) imaging and inspection is the main high-speed, non-contact, non-destructive sensing technology and development trend required by domestic and international industries in the Industry 4.0 era. Fringe projection analysis is an optical 3D measurement technique that uses periodic fringes on objects to produce fringe deformation and then resolve the 3D contour of the object. It is mainly used for optical measurement of objects with diffused surfaces. The digital holography (DH) is a new tool for optical 3D imaging and accurate quantitative analysis based on the digital wavefront reconstruction method, which can completely record and reconstruct the 3D information of objects. It can be applied to reflective objects with specular surfaces for optical 3D imaging and contour measurement. With the requirements of complex industrial processes and objects, the target objects are often combined with diffused and specular composite surfaces. However, a faster and more efficient full-field imaging and measurement method required for measuring 3D composite surface objects is still waiting! In view of this point, based on the results of previous study, I and the team of the National Taiwan Normal University have proposed the theme of this project as " A study on integrating coherent fringe projection and digital holography for three-dimensional composite surface imaging, " The whole research process in two year is scheduled to carry out research on the 3D composite surface imaging analysis and image reconstruction principle, simulation, experiment, system implementation and example applications of coherent fringe projection and digital holography. Two techniques are integrated to solve key problems such as high dynamic range fringe distortion, fringe shaping, speckle noise, image registration, to achieve high-quality, full-field 3D composite surface imaging and measurement. The first year's project will focus on: coherent fringe projection analysis on the high dynamic range surface of the three-dimensional imaging, based on the "fringe shaping" technique published recently, the coherent fringe projection and imaging architecture can be applied to the diffused surface with high dynamic range of 3D objects; The second year’s project will focus on: imaging for 3D composite surface, integrating the previous coherent fringe projection architecture into the reflective type digital holographic system for measuring the 3D composite surface, and performing image registration processing on the diffused and specular regions, achieving complete full-field 3D composite surface image reconstruction and contour measurement. In summary, the main value of this project is the innovative integration of fringe projection and digital holography, related information processing to overcome the optical detection and recording limitations of the complex diffused and specular composite surfaces of 3D objects, and a new model for full-field optical 3D imaging and inspection applications will be generated. |
