Title:

Measurement-Based 3D Torso Modeling for Corsetry

In corsetry, a precise fit is essential because a small inaccuracy can make a difference to comfort, structure, and appearance. A common way to make a corset is to create a cast of one’s body and then split it into pattern pieces. The goal of this project was to mimic this process by creating a mathematical 3D body model which can then be used to create the corset pattern. Traditional 3D body modeling is typically a result of scans or photographs of one's body, which is usually uneconomical, invasive, or simply impractical. However, I developed a technique to create accurate standardized 3D torso models from a handful of simple measurements. The models are constructed with polar-coordinate cross sections and basic mathematical interpolation. My process uses these digital torsos to successfully complete custom design and pattern drafting in a precise manner. Corsetry is a precise craft. A properly fitted corset takes into consideration body measurements, such as bust, underbust, waist, hip, and torso length, across a series of panels drafted and sewn with curved seams and boning to form the shape of the torso. Measurement accuracy shows up in body comfort, function, and appearance of garment product. Torso cross sections are represented in polar coordinates (r, θ) based on circumferential measurements. Using trigonometric ratios these coordinates can be converted to the Cartesian coordinate system (x,y). The cross sections are stacked along the vertical axis (z) and their surfaces are then interpolated to produce a smooth and continuous mesh. This creates a framework of the torso. By finding the arc length of pieces of the framework, the sewing pattern can be generated. By using the front/back and waist of the corset as anchors, the arc lengths create the proper curves between pattern pieces.

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