Three-dimensional shape measurement method and apparatus and computer program product

摘要

A control unit repeatedly photographs an image with cameras while phase shifting a sinusoidal light pattern from light projectors. A phase calculation unit receives image signals and outputs a phase signal from a set of images photographed with a sinusoidal light pattern of different phases. Absolute phase determining units receive two of the phase signals to determine the absolute phase value of the pixel positions. An absolute phase conversion unit receives the phase signal switched by a three-dimensional signal coordinate calculation control signal and the absolute phase signals to convert the phase value of the pixel positions into absolute phase. A three-dimensional coordinate unit receives the absolute phase conversion signal and the three-dimensional coordinate calculation control signal and outputs a three-dimensional coordinate signal. A three-dimensional coordinate synthesis unit receives three-dimensional coordinate signals and synthesizes shape information to output a synthesized three-dimensional coordinate signal.