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This paper proposes an interpolated light calibration optimization and high-reflective area compensation method to solve the accuracy loss caused by idealization of the photometric stereo (PS) model and high-reflective area. The spatial distribution model of light intensity is defined as a cubic interpolation function, which is used to obtain an intensity coefficient matrix to optimize the PS model.
1. Introduction In laser speckle pattern interferometry, continuous-phase information reflecting the topography of the measured object can be obtained through phase unwrapping technology [1]. In addition, the phase unwrapping technology has also been widely used in digital holography [2], grating fringe projection topography measurement [3], synthetic aperture radar [4], and nuclear magnetic resonance imaging [5].
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