Ailing Tian

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To solve the calibration problem of three-dimensional profile measurement system with fringe project method, a new measurement scheme based on ray tracing was proposed. In this measurement system, the projecting equipment and CCD camera could be positioned arbitrarily. The camera calibration technique in machine vision was used for the measurement system(More)
A linear programming phase unwrapping method in dual-wavelength digital holography is proposed and verified experimentally. The proposed method uses the square of height difference as a convergence standard and theoretically gives the boundary condition in a searching process. A simulation was performed by unwrapping step structures at different levels of(More)
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