Automated grading of clothing patterns of garment

A non-transitory computer readable storage medium storing instructions thereon, the instructions when executed by a processor cause the processor to:

• determine avatar strain ratios, each of the avatar strain ratios representing differences in one or more source avatar polygons that are part of a mesh representing one or more body portions of a three-dimensional (3D) source avatar and one or more target avatar polygons that are part of another mesh representing corresponding one or more body portions of a 3D target avatar, the one or more body portions of the 3D source avatar having different shapes compared to the corresponding one or more body portions of the 3D target avatar;
• determine mapping relationships between portions of a 3D source garment and the one or more body portions of the 3D source avatar, the 3D source garment dimensioned for draping the 3D source avatar and comprising a plurality of adjoined two-dimensional (2D) source patterns;
• and
• determine shapes of 2D target patterns of a 3D target garment dimensioned for draping the 3D target avatar by processing the avatar strain ratios and the mapping relationships, the processing comprising:
• determining a second rate between a source strain and a target strain candidate of a target pattern candidate, wherein the target strain candidate represents a target strain between a reference polygon and a polygon of the target pattern candidate;
• and
• determining locations of the target pattern polygons that restrains a difference between a first rate determined based on the avatar strain ratios and the second rate by an optimization algorithm.

An apparatus for performing automatic grading of a garment, comprising:

• a processor, and
• a memory coupled to the processor and storing instructions thereon, the instructions when executed by the processor cause the processor to:
• determine avatar strain ratios, each of the avatar strain ratios representing differences in one or more source avatar polygons that are part of a mesh representing one or more body portions of a three-dimensional (3D) source avatar and one or more target avatar polygons that are part of another mesh representing corresponding one or more body portions of a 3D target avatar, the one or more body portions of the 3D source avatar having different shapes compared to the corresponding one or more body portions of the 3D target avatar;
• determine mapping relationships between portions of a 3D source garment and the one or more body portions of the 3D source avatar, the 3D source garment dimensioned for draping the 3D source avatar and comprising a plurality of adjoined two-dimensional (2D) source patterns;
• and
• determine shapes of 2D target patterns of a 3D target garment dimensioned for draping the 3D target avatar by processing the avatar strain ratios and the mapping relationships, the processing comprising:
• determining a second rate between a source strain and a target strain candidate of a target pattern candidate, wherein the target strain candidate represents a target strain between a reference polygon and a polygon of the target pattern candidate;
• and
• determining locations of the target pattern polygons that restrains a difference between a first rate determined based on the avatar strain ratios and the second rate by an optimization algorithm.