| 摘要 |
Disclosed is a method (700) for determining displacements between pixels in a captured image (601) of a reference pattern (501) and corresponding pixels in the reference pattern (501), said method comprising the steps of capturing the image (601) of the reference pattern (501) comprising a source pattern modulated by a plurality of carrier frequencies in a corresponding plurality of directions in the source pattern, demodulating (930) at least three of the carriers in the captured image (601) to form an amplitude image (1041) and a wrapped phase image (1100) for each of the carrier frequencies, and combining (1220) the wrapped phase images (1100) weighted by the amplitude images (1041) to determine said displacements between pixels in the captured image (601) and corresponding pixels in the reference pattern (501).
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