End-to-end design of dialogue systems has recently become a popular research topic thanks to powerful tools such as encoder-decoder architectures for sequence-to-sequence learning. Yet, most current approaches cast human-machine dialogue management as a supervised learning problem, aiming at predicting the next utterance of a participant given the full history of the dialogue. This vision is too simplistic to render the intrinsic planning problem inherent to dialogue as well as its grounded nature, making the context of a dialogue larger than the sole history. This is why only chit-chat and question answering tasks have been addressed so far using end-to-end architectures. In this paper, we introduce a Deep Reinforcement Learning method to optimize visually grounded task-oriented dialogues, based on the policy gradient algorithm. This approach is tested on a dataset of 120k dialogues collected through Mechanical Turk and provides encouraging results at solving both the problem of generating natural dialogues and the task of discovering a specific object in a complex picture.

本文介绍了一种基于深度强化学习的方法，使用策略梯度算法来优化基于任务且与视觉相关的对话，该方法在通过Mechanical Turk收集的12万个对话数据集上进行了测试，并提供了鼓舞人心的结果，可以解决生成自然对话和在复杂图像中发现特定对象的问题。

目标驱动和视觉对话系统的全流程优化