Method, system, and non-transitory computer-readable medium for flattening three-dimensional shoe upper template

A system for flattening a three-dimensional shoe upper template, comprising:

• a memory for storing at least one computer program including a plurality of instructions;
• a processing unit for executing the instructions:
• provide a three-dimensional last model, wherein the three-dimensional last model comprises a three-dimensional borderline, and the three-dimensional borderline comprises a three-dimensional inner feather line and a three-dimensional outer feather line;
• perform a topological operation on the three-dimensional last model to obtain a three-dimensional grid model corresponding to the three-dimensional last model, wherein the three-dimensional grid model comprises a plurality of three-dimensional border grids and a plurality of three-dimensional inner grids, and each said three-dimensional border grid has a portion located on the three-dimensional borderline;
• perform a thickening operation on the three-dimensional grid model to obtain a three-dimensional thickened grid model;
• perform a dimensionality reduction operation on the three-dimensional thickened. grid model to obtain a two-dimensional initial-value grid model;
• and
• obtain a two-dimensional grid model with a smallest energy value by:
• performing an iterative operation for finding a least-squares solution on the two-dimensional initial-value grid model to obtain a two-dimensional corrected. grid model from each execution of the iterative operation, wherein each said two-dimensional corrected grid model comprises a plurality of two- dimensional corrected border grids corresponding to the three-dimensional border grids and a plurality of two-dimensional corrected inner grids corresponding to the three-dimensional inner grids, the two-dimensional corrected border grids of each said two-dimensional corrected grid model jointly define a two-dimensional corrected borderline, each said two-dimensional corrected borderline comprises a two-dimensional corrected inner feather line and a two-dimensional corrected outer feather line, and there is a length difference between each said two-dimensional corrected inner feather line and the three-dimensional inner feather line or between each said two-dimensional corrected outer feather line and the three-dimensional outer feather line;
• performing an energy operation on each said two-dimensional corrected grid model to calculate a sum of energy of the two-dimensional corrected border grids of each said two-dimensional corrected grid model;
• and
• obtaining a two-dimensional grid model with a said length difference from a plurality of said two-dimensional corrected grid models produced by the iterative operation falling within a predetermined range and with said two-dimensional corrected border grids having the smallest said sum of energy;
• and
• a user interface generated by the processing unit.

A non-transitory computer-readable recording medium for storing at least one computer program including a plurality of instructions to be executed by a processing unit, wherein the instructions, when executed by the processing unit, cause the processing unit to:

• provide a three-dimensional last model, wherein the three-dimensional last model comprises a three-dimensional borderline, and the three-dimensional borderline comprises a three-dimensional inner feather line and a three-dimensional outer feather line;
• perform a topological operation on the three-dimensional last mod& to obtain a three-dimensional grid model corresponding to the three-dimensional last model, wherein the three-dimensional grid model comprises a plurality of three-dimensional border grids and a plurality of three-dimensional inner grids, and each said three-dimensional border grid has a portion located on the three-dimensional borderline;
• perform a thickening operation on the three-dimensional grid model to obtain a three-dimensional thickened grid model;
• perform a dimensionality reduction operation on the three-dimensional thickened grid model to obtain a two-dimensional initial-value grid model;
• and
• obtain a two-dimensional grid model with a smallest energy value by:
• performing an iterative operation for finding a least-squares solution on the two-dimensional initial-value grid model to obtain a two-dimensional corrected grid model from each execution of the iterative operation, wherein each said two-dimensional corrected grid model comprises a plurality of two-dimensional corrected border grids corresponding to the three-dimensional border grids and a plurality of two-dimensional corrected inner grids corresponding to the three-dimensional inner grids, the two-dimensional corrected border grids of each said two-dimensional corrected grid model jointly define a two-dimensional corrected borderline, each said two-dimensional corrected borderline comprises a two-dimensional corrected inner feather line and a two-dimensional corrected outer feather line, and there is a length difference between each said two-dimensional corrected inner feather line and the three-dimensional inner feather line or between each said two-dimensional corrected outer feather line and the three-dimensional outer feather line;
• performing an energy operation on each said two-dimensional corrected grid model to calculate a sum of energy of the two-dimensional corrected border grids of each said two-dimensional corrected grid model;
• and
• obtaining, from a plurality of said two-dimensional corrected grid models produced by the iterative operation, a two-dimensional grid model with a said length difference falling within a predetermined range and with said two-dimensional corrected border grids having the smallest said sum of energy.