Image Question Answering Using Convolutional Neural Network with Dynamic Parameter Prediction

• Published in: 2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR) pp. 30 - 38
• Main Authors: Hyeonwoo Noh, Seo, Paul Hongsuck, Bohyung Han
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.06.2016
• Subjects: Computer vision; Feature extraction; Heuristic algorithms; Knowledge discovery; Logic gates; Neural networks; Prediction algorithms
• ISSN: 1063-6919
• DOI: 10.1109/CVPR.2016.11

We tackle image question answering (ImageQA) problem by learning a convolutional neural network (CNN) with a dynamic parameter layer whose weights are determined adaptively based on questions. For the adaptive parameter prediction, we employ a separate parameter prediction network, which consists of gated recurrent unit (GRU) taking a question as its input and a fully-connected layer generating a set of candidate weights as its output. However, it is challenging to construct a parameter prediction network for a large number of parameters in the fully-connected dynamic parameter layer of the CNN. We reduce the complexity of this problem by incorporating a hashing technique, where the candidate weights given by the parameter prediction network are selected using a predefined hash function to determine individual weights in the dynamic parameter layer. The proposed network-joint network with the CNN for ImageQA and the parameter prediction network-is trained end-to-end through back-propagation, where its weights are initialized using a pre-trained CNN and GRU. The proposed algorithm illustrates the state-of-the-art performance on all available public ImageQA benchmarks.