Design and Development of Three-Dimensional Structured Light Scanner with Color Coding

• Main Authors: LIU JIAN-LIANG, 劉建良
• Other Authors: Chiangc Pei-Ju
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/84011731523458911829

碩士 === 國立中正大學 === 機械工程系研究所 === 104 === 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.