Method and system for generating an image file of a 3D garment model on a 3D body model

Computer program product embodied on a non-transitory storage medium, the computer program product executable on a processor to use efficient caching and approximation strategies to reduce execution of explicit garment simulations at run-time, the computer program product executable on the processor to:

• (i) first pre-compute a deformation of a garment on a finite number of body shapes that are sampled from the human population, the pre-computing comprising:
• (a) pre-computing explicit physics simulations of the garment on a finite number of body shapes;
• (b) storing the 2D texture morph fields of each garment layer and camera view, based on the physics simulations;
• and
• (c) interpolating the garment morph for the specified body shape from examples, at rendering time, wherein a piecewise bilinear interpolation is applied to generate approximate 2D garment morph fields from at least four nearby pre-computed texture morph samples, at rendering time, and storing these simulation results in a database;
• (ii) for a specified body shape, generate an approximate garment deformation on the specified body shape by interpolating or extrapolating the pre-computed garment simulation results stored in the database on nearby sample body shapes to the specified body shape.

Computer system including a processor, the computer system configured to use efficient caching and approximation strategies to reduce execution of explicit garment simulations at run-time, the computer system configured to:

• (i) first pre-compute a deformation of a garment on a finite number of body shapes that are sampled from the human population, the pre-computing comprising:
• (a) pre-computing explicit physics simulations of the garment on a finite number of body shapes;
• (b) storing the 2D texture morph fields of each garment layer and camera view, based on the physics simulations;
• and
• (c) interpolating the garment morph for the specified body shape from examples, at rendering time, wherein a piecewise bilinear interpolation is applied to generate approximate 2D garment morph fields from at least four nearby pre-computed texture morph samples, at rendering time, and storing these simulation results in a database;
• (ii) for a specified body shape, generate an approximate garment deformation on the specified body shape by interpolating or extrapolating the pre-computed garment simulation results stored in the database on nearby sample body shapes to the specified body shape.

Method of using efficient caching and approximation strategies to reduce execution of explicit garment simulations at run-time, and generating an image file of a high resolution 3D garment model on a 3D body, comprising the steps of:

• (i) acquiring at least three 2D images of a garment on a mannequin, wherein the at least three 2D images of the garment on the mannequin capture a 360° azimuthal angle range of view of the garment on the mannequin, including capturing a texture of the garment at high resolution;
• (ii) creating a smooth and simplified 3D garment model using the at least three 2D images of the garment;
• (iii) simulating the smooth and simplified 3D garment model on the 3D body model;
• (iv) deforming and rendering the high-resolution garment texture on the simulated smooth and simplified 3D garment model on the 3D body model;
• and
• (v) generating an image file of the 3D body model, the image file including the deformed and rendered high-resolution garment texture, on the simulated smooth and simplified 3D garment model, on the 3D body model;
• (vi) pre-computing a deformation of a garment on a finite number of body shapes that are sampled from the human population, and storing these simulation results in a database;
• (vii) for a specified body shape, generating an approximate garment deformation on the specified body shape by interpolating or extrapolating the pre-computed garment simulation results stored in the database on nearby sample body shapes to the specified body shape.