Ph.D Candidate Zhang Yuzhe

Supervisor Assoc Prof. Jianmin Zheng

Co-supervisor Prof. Nadia Magnenat Thalmann

2013-11

Customize garment pattern for made-to-measure

1

Outline

• Introduction

• Prior work

• Garment customization method

• Experiments

• Summary

2

Introduction

My PHD Project

Preposition

Adaptation

2D garment

Body model

Simulation

3D garment

Flatten

Made-to-Measure

For Virtual Try on For Manufacture

Flatten

Made-to-Measure

3

Problem statement

• Input:

– 2D garment composed of 2D patterns

– 3D body model

• Output:

– 2D patterns suitable for input body

• Goal

– According to measures of body

– Less force and pressure of garment on body

4

Fit on customer

Made-to-measure

Original 2D garment Customized garment

Motivation

• Fit customer made-to-measure

• Facilitate design procedure

• Manufacturing

5

2D Garment

Pattern

Body 1

Body i

Patterns set 1

Patterns set i

Body 2 Patterns set 2

…

…

Prior work

• Developable surface based approach [Huang12] [Meng12]

– Input: body embed with features

– Process: sketches of garment

– Output: 3D garment surface + flattened 2D patterns

– Drawbacks

• Have to redesign for each body model

• Difficult to locate darts and seams

[Huang12] H.Q Huang et al. “Block pattern generation: From parameterizing human

bodies to fit feature-aligned and flattenable 3D garments” Computers in Industry, 2012

[Meng12] Yuwei Meng et al. “Computer aided clothing pattern design with 3D editing and

pattern alteration”, CAD, 2012 6

Prior work

• Transfer based approach [Meng&Wang12][Brouet12]

– Input: standard garment on reference body + target body

– Output: transfer onto target body while optimizing shape features

– Advantage:

• Formulate 3D grading criteria

– Disadvantage:

• Not consider feature of 2D pattern

[Meng&Wang12] Yuwei Meng and Charlie C.L. Wang “Flexible shape control for automatic

resizing of apparel products”, CAD, 2012

[Brouet12] Remi Brouet et al. “Design preserving garment transfer”, SIGGRAPH, 2012 7

Challenges

• For developable surface modeling

– Curvature = 0 Non-linear

– How to linearize developability optimization

• For manufacturing

– Consider feature of 2D patterns

– How to formulate 2D grading criteria

8

Proposed workflow

Pre-fitting &

Simulation

Output

2D Pattern

Flattening

3D Garment

customization

Input

Sketch features

9

Pre-fitting & Simulation

• Pre-fitting

– Extract measurements of body

– Position patterns on body

– Fitness evaluation

– Roughly scale 2D patterns

• Follow original design

• Ready to suit for body

• Simulation an initial 3D garment surface

10

Fitness evaluation

Roughly scale Simulation

3D customization

• Sketch some features

– Tight part

– Loose part

– Feature curve

• Find a new 3D garment that

– Interpolate sketched features

– Preserve feature of 3D garment and 2D patterns

11

3D optimization for customization

• Optimize: 𝑎𝑟𝑔𝑚𝑖𝑛 (𝑤𝑠𝐸𝑠 + 𝑤𝐷𝐸𝐷 + 𝑤𝐵𝐸𝐵 + 𝑤𝐼𝐸𝐼)

12

Shape

preservation

Laplacian

Developability

Linearize using the

property that normals

on Gaussian sphere

form a continuous

curve

Boundary

Boundary curves own

similar 2nd difference

Fidelity

Interpolate features

2D Pattern flattening

• Apply ABF++[Sheffer05] to obtain an initial guess

• Perturb initial 2D patches to achieve

– Boundary smoothness

– Lengths of seam pairs are equal

– Adapt darts and seams if necessary

– Consider material parameter

[Sheffer05] Alla Sheffer et al. “ABF++: fast and robust angle based flattening”, TOG, 2005 13

Not finished yet

Experiments

• Evaluate

– Force: warp and weft (F/m)

– Pressure of garment on body (F/m2)

• Four cases:

– Skirt

– Pant

– T-shirt

– Dress

14

Experiments (Case1: Skirt)

15

Customization

Original garment Customized garment

Less force &

Less pressure

Force Pressure Force Pressure

Experiments (Case2: Pant)

16

Original garment Customized garment

Customization

Experiments (Case3: T-shirt)

17

Customization

Original garment Customized garment

Experiments (Case4: Dress)

18

Customization

Original garment Customized garment

Summary

• A new formulation of garment pattern customization

– 3D optimization model

– New linearization strategy using the normal criterion of developable

surfaces

– More features considered

• On progress

– 2D pattern flattening

– Comparison with prior art

– Comprehensive evaluation

19

Thank you !

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