Abstract: An example apparatus has a processor to analyze images of projected shifted versions of a fringe pattern onto a scene to obtain phase information associated with the pixels in the image. Topology information is derived by correcting the phase information using a phase offset associated with a combination of two subsequent versions of the fringe pattern in the images or by estimating a surface normal for each pixel using a partial derivative of the phase information of the pixel in a first spatial direction and a partial derivative of the phase information of the pixel in a second spatial direction.

Abstract: An example apparatus has a processor to analyze images of projected shifted versions of a fringe pattern onto a scene to obtain phase information associated with the pixels in the image. Topology information is derived by correcting the phase information using a phase offset associated with a combination of two subsequent versions of the fringe pattern in the images or by estimating a surface normal for each pixel using a partial derivative of the phase information of the pixel in a first spatial direction and a partial derivative of the phase information of the pixel in a second spatial direction.

Abstract: A fringe projection method for determining the topography of a body (12) comprising the steps: projecting a series of sets of patterns (Ti) onto a surface (20) of the body (12), wherein each set has at least two patterns (Ti) and wherein each pattern (Ti) has S fringes; for each pattern (Ti), recording an image (24.i) of the surface (20) having the projected pattern, so that a sequence of recordings is formed; and calculating the topography from the images (24.i), wherein such patterns are projected in which each fringe has an intensity distribution perpendicular to the fringe longitudinal direction (L) and each intensity distribution can be expressed by a function (Q) which has a spatial phase position (?). According to the invention, the phase position (?) changes as a function of a code (g(s)) of the ordinal number (s) of the fringe.

Abstract: A fringe projection method for determining the topography of a body (12) comprising the steps: projecting a series of sets of patterns (Ti) onto a surface (20) of the body (12), wherein each set has at least two patterns (Ti) and wherein each pattern (Ti) has S fringes; for each pattern (Ti), recording an image (24.i) of the surface (20) having the projected pattern, so that a sequence of recordings is formed; and calculating the topography from the images (24.i), wherein such patterns are projected in which each fringe has an intensity distribution perpendicular to the fringe longitudinal direction (L) and each intensity distribution can be expressed by a function (Q) which has a spatial phase position (ß). According to the invention, the phase position (ß) changes as a function of a code (g(s)) of the ordinal number (s) of the fringe.