周国平, 朱文韬, 易传华, 曾龙辉, 黄舒欣, 祝振敏. 基于投影强度的快速高动态范围三维形状测量[J]. 应用光学, 2023, 44(1): 175-181. DOI: 10.5768/JAO202344.0103009
引用本文: 周国平, 朱文韬, 易传华, 曾龙辉, 黄舒欣, 祝振敏. 基于投影强度的快速高动态范围三维形状测量[J]. 应用光学, 2023, 44(1): 175-181. DOI: 10.5768/JAO202344.0103009
ZHOU Guoping, ZHU Wentao, YI Chuanhua, ZENG Longhui, HUANG Shuxin, ZHU Zhenmin. 3D shape measurement in fast high dynamic range based on projection intensity[J]. Journal of Applied Optics, 2023, 44(1): 175-181. DOI: 10.5768/JAO202344.0103009
Citation: ZHOU Guoping, ZHU Wentao, YI Chuanhua, ZENG Longhui, HUANG Shuxin, ZHU Zhenmin. 3D shape measurement in fast high dynamic range based on projection intensity[J]. Journal of Applied Optics, 2023, 44(1): 175-181. DOI: 10.5768/JAO202344.0103009

基于投影强度的快速高动态范围三维形状测量

3D shape measurement in fast high dynamic range based on projection intensity

  • 摘要: 条纹投影轮廓术由于具有速度快、精度高、对环境光照和表面纹理具有鲁棒性等优点,在许多领域得到了广泛应用。但是,它容易受到高动态范围(high dynamic range, HDR)对象的影响。因此提出了一种快速计算最佳投影亮度的方法。通过求解相机与投影仪之间的响应关系,结合所提出的一个简便的投影亮度确定方法,可以得到测量所需要的投影亮度。再基于所提出的图像融合算法融合求得的各个亮度下的原始图片,从而获得高质量的融合图片,实现对HDR物体的高精度的三维重构。相较于传统方法,无需盲目投射和拍摄大量图片或计算复杂的单应性矩阵,仅需要投影一张均匀白光至被测物体,即可快速求解出相机和投影仪之间的响应函数,从而获得所需的投影亮度,使得测量速度有极大的提升。

     

    Abstract: Fringe projection profilometry is widely used in many fields due to its advantages of high speed, high accuracy, and robustness to ambient lighting and surface textures. However, it is susceptible to high dynamic range (HDR) objects. Therefore, a method to quickly calculate the optimal projected brightness was proposed. By solving the response relationship between camera and projector, and combined with a proposed simple method of projection brightness determination, the required projection brightness could be obtained. Then, based on the proposed image fusion algorithm, the obtained original images under each brightness were fused to obtain high-quality fused images and achieve high-precision three-dimensional reconstruction of HDR objects. Compared with the traditional methods, there was no need to blindly project and take a large number of pictures or calculate complex homography matrices. It only needed to project a uniform white light to the measured object, and the response function between the camera and the projector could be quickly solved, so as to obtain the required projection brightness, which greatly improved the measurement speed.

     

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