THREE-DIMENSIONAL SHAPE REPRODUCING DEVICE

摘要

PURPOSE:To reproduce an object three-dimensional shape faithfully by generating nodes corresponding to the curvature of a contour line based upon contour line information, and connecting nodes at short distances among the nodes and representing a wire frame model. CONSTITUTION:A reference grating is projected on the object of measurement from a projector 31 and its deformed grating image is picked up by a television camera 32. The deformed grating image signal which is passed through an A/D converter 33 and a noise removing filter 34 and the grating pattern signal of a grating pattern generator 35 are multiplied by a multiplier 36 to form moire fringes. The moire fringes are passed through a low-pass filter 37 and converted by a threshold value processing part 28 into a binary signal, which is passed through a line thinning processing part 381 and a degree decision processing pat 39; and a node generator 40 generates noses on the moire fringes according to the curvature of each moire fringe, a node connection processing part 41 connects adjacent nodes (same moire fringes and adjacent moire fringes), and a three-dimensional shape reproduction part 42 outputs the wire frame model.