A proposal of a lip contour extraction method using deformable template and a transformation method into coordinate system based the medial canthus point

摘要

Recently, shapes and relative positions of face components such as the lip contour have been intensively studied in areas including medicine and psychology. Actually, the precise extraction of the lip contour and its position has been strongly demanded to plan the surgery and evaluate the recovery for patients with harelips and cleft palates. In this paper, we propose a non-symmetrical deformable template for the lip contour extraction using the template matching method to improve the existing symmetrical deformable template. Besides, we propose the transformation method of the lip contour model into the coorinate system based on the medial canthus point. Through evaluations using face image samples including patients, we show the accuracy of our proposed method.