1. A computer-implemented method for designing a 3D modeled object representing a real object, comprising the steps of: providing a 3D representation of the real object; identifying occurrences of a geometric feature at 3D positions of the 3D representation, the geometric feature being a 3D curvature above a predetermined 3D curvature threshold; providing at least one 2D view of the real object, the 2D view being an image of the real object; identifying occurrences of a graphic feature at 2D positions of the 2D view, the geometric feature corresponding to the graphic feature, the graphic feature relating to pixel gradient; providing 3D positions at which occurrences of the geometric feature are identified, the 3D representation having a 3D curvature above the predetermined 3D curvature threshold at the 3D positions; providing 2D positions at which occurrences of the graphic feature are identified; and computing camera parameters that minimize a distance between a set of projections of the provided 3D positions on the 2D view and a set of 2D positions.