Accurate analysis of speech articulation is crucial for speech analysis.
However, X-Y coordinates of articulators strongly depend on the anatomy of the
speakers and the variability of pellet placements, and existing methods for
mapping anatomical landmarks in the X-ray Microbeam Dataset (XRMB) fail to
capture the entire anatomy of the vocal tract. In this paper, we propose a new
geometric transformation that improves the accuracy of these measurements. Our
transformation maps anatomical landmarks' X-Y coordinates along the midsagittal
plane onto six relative measures: Lip Aperture (LA), Lip Protusion (LP), Tongue
Body Constriction Location (TTCL), Degree (TBCD), Tongue Tip Constriction
Location (TTCL) and Degree (TTCD). Our novel contribution is the extension of
the palate trace towards the inferred anterior pharyngeal line, which improves
measurements of tongue body constriction.

本文提出了一种新的几何变换方法，将解剖标志物的 X-Y 坐标映射到唇缝、唇前突出、舌身收缩位置、舌身收缩程度、舌尖收缩位置和舌尖收缩程度六个相对量度中，以改善解剖物点的准确度与鞍骨微束数据集中的嗓音区域解剖图像的映射。