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首页> 外文期刊>Optical engineering >Grayscale imbalance correcting method based on fringe normalization in RGB tricolor real-time three-dimensional measurement
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Grayscale imbalance correcting method based on fringe normalization in RGB tricolor real-time three-dimensional measurement

机译：RGB三色实时三维测量中基于条纹归一化的灰度不平衡校正方法

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摘要

In real-time phase measuring profilometry based on color-encoded sinusoidal three-step phase-shifting algorithm, three frames of red (R), green (G), and blue (B) individual channel color-encoded sinusoidal gratings with an equivalent shifting phase of 2π/3 are combined to be a color fringe pattern. While this color fringe pattern is projected onto the measured object rapidly and sequentially by a special digital light projector, a high-speed monochrome camera synchronized with the projector signal is used to capture the corresponding deformed patterns in R, G, and B channels. Due to the monochrome camera's different sensitivity to R, G, and B light, there will be a grayscale imbalance among the captured phase-shifting deformed patterns from R, G, and B channels. So, a grayscale imbalance correcting method based on fringe normalization is proposed. The experimental results verify the feasibility of the proposed method. The three-dimensional (3-D) shape information can be obtained in real-time. It is suitable for real-time 3-D measurement.
机译：在基于颜色编码的正弦三步相移算法的实时相位测量轮廓图中，红色（R），绿色（G）和蓝色（B）的三帧具有相同位移的单个通道颜色编码的正弦光栅2π/ 3的相位被组合为彩色条纹图案。在使用特殊的数字投光器将该色带图案快速连续地投影到被测物体上时，与投影仪信号同步的高速单色相机被用来捕获R，G和B通道中的相应变形图案。由于单色相机对R，G和B光的灵敏度不同，因此从R，G和B通道捕获的相移变形图案之间将存在灰度不平衡。因此，提出了一种基于条纹归一化的灰度不平衡校正方法。实验结果证明了该方法的可行性。可以实时获取三维（3-D）形状信息。适用于实时3D测量。

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  • 来源
    《Optical engineering》 |2016年第3期|034102.1-034102.8|共8页
  • 作者

    Meixue Ma; Yiping Cao; Dawu He; Cheng Chen; Yingying Wan;

  • 作者单位

    Sichuan University, Department of Opto-electronics Science and Technology, Chengdu, Sichuan 610065, China;

    Sichuan University, Department of Opto-electronics Science and Technology, Chengdu, Sichuan 610065, China;

    Sichuan University, Department of Opto-electronics Science and Technology, Chengdu, Sichuan 610065, China;

    Sichuan University, Department of Opto-electronics Science and Technology, Chengdu, Sichuan 610065, China;

    Sichuan University, Department of Opto-electronics Science and Technology, Chengdu, Sichuan 610065, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    phase measuring profilometry; RGB tricolor; real-time; dynamic object; grayscale imbalance; fringe normalization;

    机译：相位测量轮廓图RGB三色;即时的;动态物体灰度不平衡条纹归一化;

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