From Event: SPIE Optical Engineering + Applications, 2018
This paper presents a new pattern design for encoding structured light for scanning 3D surface and the decoding process. The basic unit of the pattern is a code-block that contains one central label and eight square-shaped primitives that provide two functions: code-block indexing and point-positions for triangulating. The square-shaped primitive has one notch in a different position to represent 8 digit numbers, which are easily to convert label to number for indexing codeblock. One primitive also contributes five point-positions, centroid and four extreme, for triangulating and estimating 3D information. The design of code-block has eight 8-bit numbers allowing a higher error-tolerant and providing better resolution in 3D reconstruction. Experiment shows that the proposed pattern is suitable for indoor mapping and large scene scanning.
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Chi-Chung Lau, Ching-Cherng Sun, Tsung-Hsun Yang, Yeh-Wei Yu, and Si-Min Chou, "Design of coded structured light based on square-shaped primitives," Proc. SPIE 10745, Current Developments in Lens Design and Optical Engineering XIX, 1074504 (Presented at SPIE Optical Engineering + Applications: August 21, 2018; Published: 17 September 2018); https://doi.org/10.1117/12.2320190.