概括
这项研究引入了一种新的频域技术,以消除相位移边缘投射特征测量中的高阶边缘波,提高测量精度和保留表面细节.
科学领域:
- 光学计量学 在光学计量学
- 3D表面测量 3D表面测量
背景情况:
- 移相边缘投影谱中的边缘波降低了测量精度.
- 现有的算法在高阶波方面遇到困难,尤其是相位变化减小的算法.
研究的目的:
- 提出一种非过频域技术,以消除高阶边缘波.
- 为了提高相位转移边缘投影谱的测量精度.
- 为了保持表面细节而不会模糊.
主要方法:
- 重构相位移算法作为检索基本的复杂边缘.
- 使用福里埃变换来分离频域中的基本信号和别名波.
- 循序渐进地减去波谱以恢复基本的边缘频谱.
主要成果:
- 成功地抑制了高阶边缘波的作用.
- 实现了精确的相位图测量.
- 由于非过方法,有效地保留了表面边缘和细节.
结论:
- 拟议的非过频域技术显著提高了边缘投射特征测量的测量精度.
- 这种方法有效地减轻了边缘波的影响,而不会损害表面特征的完整性.
相关概念视频
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Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
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