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2D Image based made to measure system for online apparel stores

2D Image based made to measure system for online apparel stores. Supervised by : Dr.Ravindra S. Goonetilleke Presented by : Channa P. Witana . Preliminary Study, Final Year Project 2003 : Customized E-Commerce for Shirt Making Hung Chi Yuen, Kwok Yin Hang & Wong Chi Leung. Outline.

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2D Image based made to measure system for online apparel stores

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  1. 2D Image based made to measure system for online apparel stores Supervised by : Dr.Ravindra S. Goonetilleke Presented by : Channa P. Witana Preliminary Study, Final Year Project 2003 : Customized E-Commerce for Shirt Making Hung Chi Yuen, Kwok Yin Hang & Wong Chi Leung

  2. Outline • Introduction • Methodology • Participants • Anthropometric dimensions • Manual Measurements • 2D Image based measurements • Results • Discussion • Conclusion • Acknowledgement • Q & A

  3. Introduction

  4. Introduction • “In United States, Online apparel sales exceeded $ 1 billion in 1999 and are expected to skyrocket to over $22 billion by 2004 ” (Forrester Research, 1999) • Number of apparel sold over the Internet is less than 1% of all apparel sold in the US (Beck, 2000) • Significantly lower demand than the other online consumer goods (e.g. books & music) (Beck 2000)

  5. Why Didn’t they buy Apparel Online? • A study by E-BuyersGuide.com (Jan 2000) • Approximately, 1000 consumers were surveyed. 28 %

  6. Sizing Standards & fitting problems Collar is too tight Incorrect shoulder position Sleeve is too short • Fitting problems Adopted from, www. suityourself.com (2003)

  7. Made-to-Measure (MTM) • Garments tailor-made to fit a specific customer’s body shape and preferences. (Kartsounis, Magnenat-Thalmann & Rodian, 2001) MTM systems for Online apparel stores • Customer’s body dimensions • Access to the essential dimensions (send by the customer / measured by the online shop keeper) • Accuracy of the dimensions • Customer’s preferences • Type of fit • Dress designs • Color • other

  8. Online customer’s measurements Current methods • Provide necessary instructions to the customer for taking their body measurements and upload the measurements • Provide a range of body dimensions and shapes to build an online virtual model of the customer Our approach A 2D image based anthropometric measurement system offers an alternative to traditional 3D clothing sizing (Meunier and Yin, 2000) • Similar concept can be used to measure online customers.

  9. Objective • Design a simple, convenient and economical measurement system that will facilitate MTM for online apparel retailing and its performance evaluation.

  10. Methodology

  11. Participants • Twenty (20) Hong Kong Chinese males (Staff & students at HKUST) • Age range – 20 to 38 years (mean = 24 years) • Height range – 161 to 180 cm • Weight range – 46 to 86 kg

  12. Anthropometric dimensions (Meunier and Yin, 2000) and Clothing Industry Training Authority, Hong Kong Back view Front view

  13. Manual measurements • Used conventional cloth tape measure with 1 mm precision. • Sound measuring strategy • Constant pulling force on the measuring tape • Constant exerted force on the body while measuring • Correct landmarks more details

  14. 2D Image based measurements • Image analysis process Circumference Measurements Extract 2 Dimensional measurements Front View Convert to 3 Dimensional measurements Picture Scaling according to the Reference Object Data Output Storage Side View Linear Measurements Extract 2 Dimensional measurements Back View

  15. Results

  16. Results (1) • Manual and 2D Image based measurement comparison results (cm) N = 20

  17. Results (2) Mean Std. dev • Mean Error and Standard Deviation for all subjects • Error = 2D Image based measurement – Manual measurement

  18. ANOVA for each Dimension (1)

  19. ANOVA for each Dimension (2) P < 0.05 P < 0.05

  20. Discussion

  21. Discussion (1) • According to the statistical analysis, two methods (Manual and 2D image based) have no significant difference for measurements, except Waist to Hip Length (WH) and Chest Girth (CG). • WH measurement variation – visibility of the landmarks • CG measurement variation – Continuous changes of body shape around the chest during inhaling and exhaling. Hip point is not visible Hip point is visible

  22. Discussion (2) • Circumferential measurements considered as an Ellipse or a combination of an Ellipse and a rectangle. • These shapes may not be suitable for all the populations • Further investigations to verify external validity • Accuracy of the measuring system depends on the landmark location and the reference object. Landmarks – Wear thin long sleeve t-shirt with horizontal and vertical stripes at known uniform distance Reference object – Customer’s printouts may not be in 1:1 scale.( not exactly 15 cm x 15 cm square) – Customer can send measured value of the printed reference object.

  23. Discussion (3) • The concept of this 2D image based system is somewhat similar to the methodology proposed by Meunier et al, 2000. • Customer can capture their pictures at a convenient place (at home etc.) with their own equipments (cameras, printers etc.) • The proposed system could be cheaper, accurate and convenient compared to the existing methods for online MTM apparels .

  24. Conclusion

  25. Conclusion • Proposed 2D image based system can provide anthropometric measurements that are similar to the manual tape measurements. • Further investigation may required to increase the accuracy on WH and CG measurements and to verify the external validity of the findings. • The impact is expected to be quite significant for the online apparel industry due to the simplicity and the productivity of the approach proposed by this study.

  26. Acknowledgement • Special thanks to : Hung Chi Yuen Kwok Yin Hang Wong Chi Leung

  27. Thank You !

  28. Details on Body measurements CITA, HK (2002) Neck front to waist 前腰長 Back length 後腰長 Cross shoulder over neck 肩濶 Armhole depth 袖圈深度

  29. Picture Scaling 15 cm 15 cm 15 cm Actual Value of the dimension Length of the square in the photo Length of the dimension in the photo • Reference object • Convert the picture in to Actual scale

  30. Circumference Measurements • Neck Circumference (HK Chinese) • Cross sectional shape of the neck fitted to an Ellipse. • Values of Major & Minor axes from front & side views Major Minor Front View Side View

  31. Circumference Measurements • Chest Girth (HK Chinese) • Cross sectional shape of the Chest Back Side Chest thickness Chest Width Front Side

  32. Linear Measurements • Arm Length (HK Chinese)

  33. Making the Model (www.myvirtualmodel.com,2003)

  34. Virtual try on (www.myvirtualmodel.com,2003)

  35. Paired T-Test Dimensions T – Value P – Value NW 0.59 0.563 BL 0.34 0.737 AH 0.23 0.820 CS 0.38 0.711 AL 0.22 0.831 WH 5.50 0.000* CG 2.26 0.036* NC -1.96 0.065 WC -1.46 0.161 PC 0.87 0.395 • Manual & 2D Image based measuring methods

  36. Interface

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