研究目的
To develop a method for the estimation of the systematic measurement error of 3D scanning devices based on structured light projection technique and stereo camera observation, practically applicable for arbitrary optical 3D scanners based on structured light projection technique.
研究成果
The new methodology significantly reduces systematic measurement errors in optical 3D scanners, with potential improvements by a factor of two. Future work includes automation of data capturing, testing with more scanning devices, and extending data acquisition for better depth error information.
研究不足
The method requires numerous well-distributed ballbar measurements for robust error estimation. Complete compensation of systematic errors is not achievable due to their multiple origins and the partial correlation between polynomial coefficients.
1：Experimental Design and Method Selection:
The methodology involves geometric compensation of the systematic measurement error over the measurement volume using polynomials or sampling points in an equidistant volumetric grid.
2：Sample Selection and Data Sources:
Measurements of a ballbar in different positions within the measurement volume to determine length measurement errors.
3：List of Experimental Equipment and Materials:
Optical 3D scanner, ballbar, and holding mechanism for the ballbar.
4：Experimental Procedures and Operational Workflow:
Placement of the ballbar in various orientations within the measurement volume, measurement of length errors, and application of correction functions.
5：Data Analysis Methods:
Use of polynomial or sampling point models to describe and compensate for systematic errors, with evaluation based on simulations and real data measurements.
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