Mian Ajmal S, Bennamoun Mohammed, Owens Robyn
School of Computer Science and Software Engineering, The University of Western Australia, 35 Stirling Highway,Crawley, Western Australia, 6009.
IEEE Trans Pattern Anal Mach Intell. 2007 Nov;29(11):1927-43. doi: 10.1109/TPAMI.2007.1105.
We present a fully automatic face recognition algorithm and demonstrate its performance on the FRGC v2.0 data. Our algorithm is multimodal (2D and 3D) and performs hybrid (feature-based and holistic) matching in order to achieve efficiency and robustness to facial expressions. The pose of a 3D face along with its texture is automatically corrected using a novel approach based on a single automatically detected point and the Hotelling transform. A novel 3D Spherical Face Representation (SFR) is used in conjunction with the SIFT descriptor to form a rejection classifier which quickly eliminates a large number of candidate faces at an early stage for efficient recognition in case of large galleries. The remaining faces are then verified using a novel region-based matching approach which is robust to facial expressions. This approach automatically segments the eyes-forehead and the nose regions, which are relatively less sensitive to expressions, and matches them separately using a modified ICP algorithm. The results of all the matching engines are fused at the metric level to achieve higher accuracy. We use the FRGC benchmark to compare our results to other algorithms which used the same database. Our multimodal hybrid algorithm performed better than others by achieving 99.74% and 98.31% verification rates at 0.001 FAR and identification rates of 99.02% and 95.37% for probes with neutral and non-neutral expression respectively.
我们提出了一种全自动人脸识别算法,并在FRGC v2.0数据上展示了其性能。我们的算法是多模态的(2D和3D),并进行混合(基于特征和整体)匹配,以实现对面部表情的效率和鲁棒性。使用一种基于单个自动检测点和霍特林变换的新颖方法,自动校正3D面部的姿态及其纹理。一种新颖的3D球面脸表示(SFR)与SIFT描述符结合使用,形成一个拒绝分类器,在图库较大的情况下,该分类器可在早期快速消除大量候选人脸,以实现高效识别。然后,使用一种对面部表情具有鲁棒性的基于区域的新颖匹配方法对其余人脸进行验证。该方法自动分割对表情相对不敏感的眼睛-额头和鼻子区域,并使用改进的ICP算法分别对它们进行匹配。所有匹配引擎的结果在度量级别进行融合,以实现更高的准确性。我们使用FRGC基准将我们的结果与使用相同数据库的其他算法进行比较。我们的多模态混合算法表现优于其他算法,在误识率为0.001时,中性表情探针的验证率达到99.74%,非中性表情探针的验证率达到98.31%,识别率分别为99.02%和95.37%。