关键词: 特征提取, 人脸识别, 角点检测, 曲线拟合

Abstract: A nose tip detection method based on the corner detection of face silhouette is proposed, in order to realize the rapid and accurate location of the nose tip when the face has an expression and attitude changes. Firstly, the cylinder head model is used to correct the face attitude roughly. Then, the rotation projection method is applied to extract the profile signatures, and the candidate nose tip regions are located according to the corner of face silhouette on B-spline scale space. Finally, the position of the nose point is accurately positioned according to the shape feature and the protruding characteristic of the nose point. The results of the experiment on CAISA 3D and BOSPHORUS demonstrate that the proposed method has great robustness to expression and attitude, and the positioning accuracy is superior to the methods based on the prior information and the statistical template.

Key words: feature extraction, face recognition, corner detection, curve fitting