• Laser & Optoelectronics Progress
  • Vol. 56, Issue 22, 221202 (2019)
Jianyang Feng, Haiyun Chen*, Chu Shi, Gaoming Liu, and Xiang Yan
Author Affiliations
  • School of Electrical Engineering and Information, Southwest Petroleum University, Chengdu, Sichuan 610500, China
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    DOI: 10.3788/LOP56.221202 Cite this Article Set citation alerts
    Jianyang Feng, Haiyun Chen, Chu Shi, Gaoming Liu, Xiang Yan. Three-Dimensional Measurement of Highly-Reflective Surface Using Structured Light Technique[J]. Laser & Optoelectronics Progress, 2019, 56(22): 221202 Copy Citation Text show less

    Abstract

    A novel structured light technique is proposed in which the strip-edge-based structured light coding strategy is used to generate the projection patterns for reducing the area of oversaturation in an image captured using a camera. The structured light images are captured using both long and short exposure time during a single measurement to avoid image saturation. The long exposure time is used to obtain high-quality images of dark areas, whereas the short exposure time is used to obtain high-quality images of saturated areas. Furthermore, in the short exposure stage, the intensity relation between the projected image and the captured image is estimated by fitting a nonlinear function, and the saturated pixels in the captured image are adaptively adjusted to correspond to the pixel intensities in the projected image. Subsequently, the short- and long-exposure images are combined to form a set of fringe images with a high signal-to-noise ratio, and new images are decoded to achieve accurate three-dimensional measurement. The experimental results denote that the proposed structured light technique exhibits high measurement accuracy for object surfaces denoting a large range of reflectivity variation, including stainless steel surfaces.
    Jianyang Feng, Haiyun Chen, Chu Shi, Gaoming Liu, Xiang Yan. Three-Dimensional Measurement of Highly-Reflective Surface Using Structured Light Technique[J]. Laser & Optoelectronics Progress, 2019, 56(22): 221202
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