The University of British Columbia

University of Toronto

Inria Institut National De Recherche En Informatique Et En Automatique

Institut National De Recherche En Informatique Et En Automatique

Adrien Bousseau

Alla Sheffer

Karansher Singh

Cloud Yunfei Shao

Karan Singh

James Kenneth McCrae

Baoxuan Xu

Will Chang

A method is for estimating a three-dimensional (3D) representation of a set of two-dimensional (2D) curves of a concept drawing, the estimate of the 3D representation corresponding to a 3D object underlying the concept drawing. The method comprises: obtaining a representation of a set of 2D curves a concept drawing that represent a 3D object underlying the concept drawing; determining an energy function based on the set of 2D curves, the energy function comprising one or more terms, each term reflective of a preference for a 3D representation based on a characteristic of the 2D curves which reflects how concept drawings are commonly perceived to represent 3D objects; and performing an optimization which minimizes the energy function to thereby determine the 3D representation.

Methods and systems for estimating three-dimensional information from two-dimensional concept drawings

Methods for characterizing two-dimensional concept drawings are disclosed. The concept drawings comprise cross-sections intersecting at cross-hairs. The method comprises: determining, for each cross-section: a plane on which the cross-section is located, the plane having a normal vector in a three-dimensional coordinate system; and, for each cross-hair on the cross-section, a tangent vector in the three-dimensional coordinate system which is tangent to the cross-section at the cross-hair. For each cross-hair comprising iand jintersecting cross-sections, one or more constraints are satisfied, the constraints comprising: the normal vector nof the plane on which the icross-section is located is at least approximately orthogonal to the normal vector nof the plane on which the jcross-section is located; and the tangent vector tto the icross-section at the cross-hair is at least approximately orthogonal to the tangent vector tto the jcross-section at the cross-hair.

Methods and systems for characterizing concept drawings and estimating three-dimensional information therefrom

Growing community of inventors

Courlay, France

Adrien Bousseau