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Hong Kong's PolyU tech projects body shape, size in 10 Sec

09 May '18
2 min read

The Hong Kong Polytechnic University (PolyU) has developed an intelligent 3D human modelling system by integrating computer graphic and vision technology to simplify and enhance the process of shopping well-fitting clothes online. The system digitally accurately reconstructs the shape and size of a person from two full body photographs within 5-10 seconds.

Developed by Tracy P.Y. Mok, associate professor from PolyU’s Institute of Textiles and Clothing and PhD graduate Zhu Shuaiyin, the innovation allows a customised model in arbitrary dynamic poses to be created automatically within 5-10 seconds, according to a press release from Zhu’s start-up TOZI.

Existing methods to achieve automatic shape modeling and dynamic poses deformation, including scan-based, image-based and example-based have known limitations. They involve expensive and bulky scanners and too much approximation, and therefore are of questionable accuracy.

The system can reconstruct the 3D shape and extract over 50 size measurements of different parts of a person, including the girth of bust, waist, hip, thigh, knee, calf and neck, as well as arm length, shoulder slope accurately. The discrepancies in tight-fitting and loose-fitting clothing are less than 1cm and 2cm respectively, which are precise enough to fulfil the specific requirements of the clothing industry for fashion applications and comparable to body scans.

Four methods were used to digitise human models: detecting body parts in tight fitting clothing from front-view and side-view 2D images and then construct them to 3D models; predicting under-the-clothes body profiles of the subjects based on input images where the body profiles are covered; applying cutting-edge deep learning technology to segmentise the human body image from the background; and applying the modelling methods to develop a client-server system.

These methods are enabled by big data analytics, where a large dataset with over 10,000 human scan models were used to analyse local 3D shape features and predict under-the-clothes body profiles.

With the support from Shanghai Technology Entrepreneurship Foundation-PolyU China Entrepreneurship Fund, Zhu set up TOZI in Shenzhen in 2017 to commercialise and further develop the technology. (DS)

Fibre2Fashion News Desk – India

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