Robust and efficient decoding scheme for line structured light

•Discuss the problem of line stripe ambiguities.•New pixel-wise decoding scheme for line scanning patterns.•Robust to line stripe ambiguities which significantly affect typical spatial peak-detection methods.

Accurately and robustly extracting the peak positions of line stripes has been the focus of 3-D reconstruction by using line structured light. However, typical peak detection algorithms need to employ neighborhood techniques, and, thus, their accuracies are susceptible to line stripe ambiguities. In this paper, we present a pixel-wise decoding scheme for line-scanning patterns. The proposed method can achieve: (1) robustly decoding without neighboring operations and (2) efficient implementation without searching maximum intensities or computing derivatives. Compared with typical spatial peak-detection algorithms, our experimental results demonstrate that, with holding the same scanning accuracy, the proposed method achieves much higher computational efficiency and more robustly decoding.