SHAPE RECOGNIZING DEVICE AND DEFORMATION EVALUATING DEVICE

摘要

A shape recognizing device (50) for recognizing the shape of a surface to be measured on the basis of three-dimensional measurement data on the surface. The device comprises approximated curve applying means (43) for applying first approximated curves having given curvatures to respective items of a first data set along the length direction of a cross section out of two-dimensional cross-section data of the measurement data representing the roughness of the surface to be measured, curvature deriving means (44) for deriving the curvatures of the first approximated curves, uniform range determining means (45) for determining the uniform range where the curvature is uniform along the length direction of the cross section according to the variation data on the variation of the derived curvatures along the length direction of the cross section, and approximated curve deriving means (46) for deriving a second approximated curve having a given curvature on the basis of a second set of data present in the uniform range out of the two-dimensional cross-section data.