We address the problem of modifying a given well-designed 2D sewing pattern to accommodate garment edits in the 3D space. Existing methods usually adjust the sewing pattern by applying uniform flattening to the 3D garment. The problems are twofold: first, it ignores local scaling of the 2D sewing pattern such as shrinking ribs of cuffs; second, it does not respect the implicit design rules and conventions of the industry, such as the use of straight edges for simplicity and precision in sewing. To address those problems, we present a pattern adjustment method that considers the non-uniform local scaling of the 2D sewing pattern by utilizing the intrinsic scale matrix. In addition, we preserve the original boundary shape by an as-similar-as-possible geometric constraint when desirable. We build a prototype with a set of commonly used alteration operations and showcase the capability of our method via a number of alteration examples throughout the paper.

翻译：我们解决在三维空间中修改精心设计的二维缝纫版型以适应服装编辑的问题。现有方法通常通过将三维服装均匀展开来调整缝纫版型，这存在两个问题：首先，忽略了二维缝纫版型的局部缩放，例如袖口的收缩罗纹；其次，不尊重行业隐式的设计规则和惯例，例如使用直线边缘以保证缝制简便性和精确性。为解决这些问题，我们提出一种通过利用内蕴尺度矩阵来考虑二维缝纫版型非均匀局部缩放的调整方法。此外，在需要时，我们通过尽可能相似的几何约束保留原始边界形状。我们构建了一个包含常用修改操作的原型系统，并通过文中多个修改实例展示了该方法的能力。