色彩編碼於三維掃描之設計與開發

本研究目的在發展新的編解碼方式，目前量測系統多使用格雷編碼技術進行量測，雖然精準但拍攝較耗費時間，因此，本文利用彩色影像具有三通道的特性，在相同的解析度下運用較多的色彩將編碼影像的數量減少，提升量測效率。然而彩色編碼重建的三維影像精度卻不如格雷碼精準，為了改善彩色編碼的精度，本文提出偏移圖形的概念，將投影條紋偏移一個條紋寬度，計算兩張圖形的色彩強度值曲線交錯的位置，不僅能計算準確的邊界位置，還能降低多通道串擾的影響，並結合邊界繼承方法消除多層影像疊合時相同邊界不一致的誤差。根據實驗結果，證明本文提出的方法可以改善解碼影像，提升彩色編碼重建三維影像的品質，減少投影張數且不會降低精度。

關鍵字

彩色編碼；三維量測；結構光；串擾

並列摘要

The research aims to develop a method about structured light codec techniques. In the last few years, gray code is commonly used for structured-light 3D scanner measuring which is accurate but time consuming. Therefore, this paper takes advantage of color image with three channels to reduce the number of projected images in the same resolution, improving the scanning efficiency. However, the depth accuracy reconstructed by color code is not as good as gray code. In order to improve the accuracy of color code, this paper propose an idea that offset the pattern a stripe width, then calculate the intersection of two image's intensity value curve, it's not only able to estimate the accurate boundaries but also can reduce the crosstalk effects between different channels. In addition to that, we combine boundary inheritance methods to eliminate the error of the consistency among the same boundaries of different layers in pattern hierarchy. According to the experimental results prove that the proposed method improves the decoding image, enhance the quality of color coded reconstruction, and reduce the number of projected images without reducing accuracy.

並列關鍵字

encoding ； 3D scanner ； structured light ； cross-talk

參考文獻

[1]. L. Zhang, B. Curless and S. M. Seitz , "Rapid shape acquisition using color structured light and multi-pass dynamic programming" , IEEE 3D Data Processing Visualization and Transmission (2002): 24-36

[2]. Barone, Sandro, Alessandro Paoli, and Armando Viviano Razionale. "A Coded Structured Light System Based on Primary Color Stripe Projection and Monochrome Imaging." Sensors vol.13 (10) (2013): 13802-13819.

[3]. Caspi, Dalit, Nahum Kiryati, and Joseph Shamir. "Range imaging with adaptive color structured light." Pattern Analysis and Machine Intelligence, IEEE Transactions on vol.20 (5) (1998): 470-480.

[4]. Chen, H. J., et al. "3-D shape measurement by composite pattern projection and hybrid processing." Optics express vol.15 (19) (2007): 12318-12330.

[5]. Lee, Sukhan, and Lam Quang Bui. "Accurate estimation of the boundaries of a structured light pattern." JOSA A vol.28 (6) (2011): 954-961.

國際替代計量

色彩編碼於三維掃描之設計與開發

未授權

主題瀏覽