High-speed three-dimensional shape measurement using GOBO projection

Irritation-free pattern projection system for accurate 3D face and body scans

“…From the several possibilities for the used pattern for the structured illumination we applied aperiodic sinusoidal fringe patterns [3,4]. The generation of the pattern sequence (n patterns) was realized by a so-called GOBO projector, that performs the projection by a rotating wheel with radially arranged fringes, illuminated by a high power LED lamp (see figure 1).…”

“…a gas-filled tube or halogen lamp), a light collector (ellipsoidal reflector or condenser), a slide (e.g., made of steel or glass), and an imaging optical system (with fixed focal length or zoom lens) as optical components. For more details concerning the GOBO principle see [3].…”

“…The aperiodic sinusoidal patterns were generated using a glass GOBO wheel (according to Heist et al [3]) on which the pattern was made of a chrome coating. Thus, only the near-infrared radiation is projected into the measurement plane for an irritation-free measurement.…”

“…This technique provides the advantage of relative high spatial resolution and measurement accuracy. Recently high-speed camera technique provides 3D frame rates up to 1 kHz [3,4]. The basis for many different fields of application of 3D person scanning is the technological development of hardware and software components for suitable 3D scanning systems.…”

Motion artifact reduction using hybrid Fourier transform with phase-shifting methods

“…[11][12][13][14][15][16] The methods of using more than one camera [2][3][4] can effectively reduce the motion induced error by introducing another camera. This is owing to the fact that any motion artifacts within the phase data would appear in each of the two synchronized cameras, and thus it won't affect the detection of correspondence.…”