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This paper introduces a method for the determination of the slope and period of oblique and equi-spaced fringes by pattern correlation. In the method, two pairs of image patches in two different regions of a fringe pattern are selected for pattern correlation calculations, and the phase shift between the two selected regions of the fringe pattern is obtained from the phase curves computed with the...
This paper presents a method of phase difference determination by fringe pattern correlation in interferometry. In the method, the phase difference between two fringe patterns is determined by fringe pattern correlation and linear interpolation with subpixel accuracy. The experiment shows that this method is useful for the determination of phase difference between two equi-spaced fringe patterns in...
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