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：本文研究了如何修改给定的优质二维缝纫纸样以适应三维空间中的服装编辑。现有方法通常通过对三维服装进行均匀展平来调整纸样，但存在两个问题：一是忽略了二维缝纫纸样的局部缩放特性（如袖口的收缩罗纹）；二是不符合行业隐式设计规则与惯例（如采用直边以保证缝制简便性与精确性）。针对上述问题，本文提出一种利用固有尺度矩阵考虑二维缝纫纸样非均匀局部缩放的纸样调整方法。此外，在必要时通过"尽可能相似"的几何约束保留原始边界形状。我们构建了包含一组常用修改操作的原型系统，并通过文中若干修改实例展示了本方法的性能。