In reconstruction of the off-axis digital hologram of diffuse reflection objects, the position of the positive first-order image cannot be accurately obtained because of the low quality of the reconstruction image. This paper focuses on the above problem and proposes a method for marking the first-order image of the 1-FFT surface based on the fast Fourier transform (1-FFT). The parameters of angle of illumination light were investigated, and the maximum relative measurement error is 5.6% by standard objects. The multiaperture stitching technique in cylindrical coordinates is applied to digital holography technology, and the particle swarm optimization algorithm is used to transform the nonlinear equations into optimization problems to solve the splicing parameters. Finally, the 3D display of a typical rotary three-dimensional mechanical part is successfully realized with holography stitching using the above method.

中文翻译：

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基于数字全息的机械零件三维重构

在重建漫反射物体的离轴数字全息图时，由于重建图像的质量低，因此不能准确地获得正一阶图像的位置。本文针对上述问题，提出了一种基于快速傅里叶变换（1-FFT）的1-FFT表面一阶图像标记方法。研究了照明光的角度参数，以标准物为基准，最大相对测量误差为5.6％。将圆柱坐标中的多孔径拼接技术应用于数字全息技术，并采用粒子群优化算法将非线性方程式转化为优化问题，以求解拼接参数。最后，