论文标题
面部表达识别的跨源性纹波模式
Cross-Centroid Ripple Pattern for Facial Expression Recognition
论文作者
论文摘要
在本文中,我们提出了一种新功能描述符横抗纹波模式(CRIP),以进行面部表达识别。 CRIP通过分别在Radius R1和R2的两个波纹之间结合横染性关系来编码面部表达的过渡模式。这些涟漪是通过将当地邻里区域分为子区域而产生的。因此,CRIP具有在广泛区域保留宏观和微结构变化的能力,这使其能够处理侧视图和自发表达。此外,交叉中心纹波之间的梯度信息可为捕获主动斑块中的突出边缘特征:眼睛,鼻子和嘴,这定义了不同面部表情之间的差异。交叉质心信息还为不规则照明提供了鲁棒性。此外,CRIP利用在子区域的像素的平均行为,产生鲁棒性来应对嘈杂的条件。在七个综合表达数据集上评估了所提出的描述符的性能,这些数据集由年龄,姿势,种族和照明变化等挑战性条件组成。实验结果表明,与现有的最新方法相比,我们的描述符始终达到更好的准确率。
In this paper, we propose a new feature descriptor Cross-Centroid Ripple Pattern (CRIP) for facial expression recognition. CRIP encodes the transitional pattern of a facial expression by incorporating cross-centroid relationship between two ripples located at radius r1 and r2 respectively. These ripples are generated by dividing the local neighborhood region into subregions. Thus, CRIP has ability to preserve macro and micro structural variations in an extensive region, which enables it to deal with side views and spontaneous expressions. Furthermore, gradient information between cross centroid ripples provides strenght to captures prominent edge features in active patches: eyes, nose and mouth, that define the disparities between different facial expressions. Cross centroid information also provides robustness to irregular illumination. Moreover, CRIP utilizes the averaging behavior of pixels at subregions that yields robustness to deal with noisy conditions. The performance of proposed descriptor is evaluated on seven comprehensive expression datasets consisting of challenging conditions such as age, pose, ethnicity and illumination variations. The experimental results show that our descriptor consistently achieved better accuracy rate as compared to existing state-of-art approaches.