| Summary: | 博士 === 國立成功大學 === 工業設計學系 === 102 === Fashion Design is an industry closely connected to our daily life. Computer-aided fashion design can enhance the efficiency of product development, in which a 3D mannequin links the development and application of the entire design system. A typical application is that surface flattening enables 3D surface on the 3D mannequin which can be developed on the 2D platform. Besides, the obtained 2D pattern can be used in the field of design and manufacturing, thus rendering the 3D mannequin data required for fashion design appears very important. To achieve this objective, this study provides the development of a computer-aided fashion design system based on 3D mannequin, and it mainly includes two parts: 3D mannequin and surface flattening.
This study proposed a systematic method for surface reconstruction of 3D mannequins based on feature curves. First of all, the study applied reverse engineering methods to scan a mannequin model commonly used in the fashion design profession by extracting grid points that represent the shape features from the scanned data after the segmentation of the mannequin model through feature surfaces. Then, the shape of the entire 3D mannequin is reconstructed using B-spline surfaces. Simultaneously, the continuity among the connected B-spline surfaces is adjusted with tangent vector adjustment methods based on the minimum energy required for improving the quality of the shaped surfaces. When this 3D Mannequin is implemented in the computer-aided fashion design system, different size of body can create by shape morphing. Besides, this study describes surface flattening based on minimum energy methods according to the property of different fabrics. In this methodology, 3D surface is developed on the 2D platform by geodesic method, and then strain energy that has accumulated in mesh can be stably released by an approximate implicit method and revised error function. In some cases, cutting mesh to further release the energy is a common way to fix the situation and enhance the accuracy of the surface flattening, and this makes the obtained 2D pattern naturally generate significant cracks. Through the developed 3D mannequin, many techniques in fashion design can be applied to the 2D pattern; it enhances the level of computer-aided fashion design.
Finally, this research uses several case studies to illustrate and verify the feasibility of this methodology, and they is applied and integrated to the computer-aided fashion design system being developed to achieve product development using synchronous design methods.
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