Method and apparatus for range imaging

摘要: A range imaging system in which a moving periodic pattern is projected onto the scene to be imaged. The phase by variations cause portions of shift are monitored develop data. television camera offset from axis illumination generates four frames intensity values. shifts one-quarter cycle with respect between each frames. data third frame subtracted first and fourth second cancel effects background illumination. difference represents sine signal cosine signal. arc tangent quotient these values phase, thus relative various points image. can generated either translating plate or rotating disk has variation transmissiveness. An ambiguity exists when change causes one complete cycle. By employing on larger spatial period, no occurs increased.