Abstract: Implementing face recognition efficiently to real world large scale dataset presents great challenges to existing approaches.The method in this paper was proposed to learn an identity distinguishable space for large scale face recognition in MSR- Bing image recognition challenge (IRC). Firstly, a deep convolutional neural network (CNN) was used to optimize a 128 B embedding for large scale face retrieval. The embedding was trained via using triplets of aligned face patches from FaceScrub and CASIA-WebFace datasets. Secondly, the evaluation of MSR-Bing IRC was conducted according to a cross-domain retrieval scheme. The real-time retrieval in this paper was benefited from the K-means clustering performed on the feature space of training data. Furthermore, a large scale similarity learning (LSSL) was applied on the relevant face images for learning a better identity space. A novel method for selecting similar pairs was proposed for LSSL. Compared with many existing networks of face recognition, the proposed model was lightweight and the retrieval method was promising as well.

Key words: face recognition, convolutional neural network (CNN), triplet loss, inception, similarity learning