Patent ID: 8947677
Filing Date: 2015-02-03
Classification: G01B,G06T

Abstract:
1. A system for 3-D triangulation-based image acquisition of a surface-of-interest under observation by at least one camera, by projecting onto the surface-of-interest a multi-frequency pattern comprising a plurality of pixels representing at least a first and second superimposed sinusoid projected simultaneously, each of the sinusoids represented by the pixels having a unique temporal frequency and each of the pixels projected to satisfy where I n p is an intensity of a pixel in a projector for an n th projected image in a particular moment in time; K represents a number of component sinusoids comprising the first and second superimposed sinusoids, where K is less than or equal to (N+1)/2, the multi-frequency pattern comprising at least N projected patterns; a parameter B k p represents constants for determining at least one parameter of each of said component sinusoids; A p is a scalar; f k is a spatial frequency of a k th sinusoid corresponding with temporal frequency k; and y p represents a spatial coordinate in an image projected comprising the multi-frequency pattern.