Virtual garment sewing

Abstract

Recent years have seen an increased interest in Virtual Try-On, which aims to establish innovative techniques for realistic, three-dimensional, real-time simulations and visualization of customized clothing. Therefore, it would be beneficial to develop a system to integrate these techniques into practice. This research has led to the development of a virtual sewing system that could assemble two-dimensional panels into a three-dimensional garment around a virtual human body. The main purpose of virtual sewing is to develop a sewing system for applying a physical based cloth model for garment building in 3D, specifically for geometrically complex garments. In this research, we take an efficient approach for creating 3D forms of garments. Based on the mass-spring model of cloth, our research is aiming to develop methods for sewing simple 2D panels to complex-shaped configurations of garments, presenting several levels of design complexities (e.g. collar sewing.) for CAD design, simulation and virtual reality purposes. This thesis presents three primary contributions. First, a seam model suitable for modelling tension puckering of 301 lock stitches is proposed. Second, a systematic solution for assembling different styles of collars that belong to the main classification of garment collars is presented, most notably multi-layer collars, including both convertible collars and tailored suit collars. Third, an approach for applying the seam model to 3D garments for generating a wrinkled appearance is proposed. Several models and algorithms are developed for sewing and fitting purposes. Based on the theoretical analysis of tension model of thread, the computational analysis in terms of the integration of both the tension model and the mass-spring model of fabric is performed. The seam model has been extended to the complete geometry of garment: the structured and unstructured garment mesh. Emphasis is placed on the unstructured garment mesh. An algorithm of searching for triangular strips along the seam lines is presented. As an application of the seam model, techniques for generating seam mesh are proposed to produce a wrinkled appearance on the surface of seamed garment. An important application of the sewing method is to the high-level complexity of collar design. An approach of collar deformation especially for convertible collar and tailored suit collar is presented to solve problems such as the prepositioning of collars with multi-layers. Other interesting algorithms include picking up the desirable path by application of Dijkstra's algorithm, improvement of mesh quality by means of the Laplacian smoothing algorithm, and applying the mesh subdivision algorithm to garments.