智能感知与计算研究中心知识库

Training with more data has always been the most stable and effective way of improving performance in deep learn- ing era. As the largest object detection dataset so far, Open Images brings great opportunities and challenges for object detection in general and sophisticated scenarios. However, owing to its semi-automatic collecting and labeling pipeline to deal with the huge data scale, Open Images dataset suf- fers from label-related problems that objects may explicitly or implicitly have multiple labels and the label distribution is extremely imbalanced. In this work, we quantitatively an- alyze these label problems and provide a simple but effec- tive solution. We design a concurrent softmax to handle the multi-label problems in object detection and propose a soft- sampling methods with hybrid training scheduler to deal with the label imbalance. Overall, our method yields a dra- matic improvement of 3.34 points, leading to the best single model with 60.90 mAP on the public object detection test set of Open Images. And our ensembling result achieves 67.17 mAP, which is 4.29 points higher than the best result of Open Images public test 2018.