We present a comprehensive framework for egocentric interaction recognition
using markerless 3D annotations of two hands manipulating objects. To this end,
we propose a method to create a unified dataset for egocentric 3D interaction
recognition. Our method produces annotations of the 3D pose of two hands and
the 6D pose of the manipulated objects, along with their interaction labels for
each frame. Our dataset, called H2O (2 Hands and Objects), provides
synchronized multi-view RGB-D images, interaction labels, object classes,
ground-truth 3D poses for left & right hands, 6D object poses, ground-truth
camera poses, object meshes and scene point clouds. To the best of our
knowledge, this is the first benchmark that enables the study of first-person
actions with the use of the pose of both left and right hands manipulating
objects and presents an unprecedented level of detail for egocentric 3D
interaction recognition. We further propose the method to predict interaction
classes by estimating the 3D pose of two hands and the 6D pose of the
manipulated objects, jointly from RGB images. Our method models both inter- and
intra-dependencies between both hands and objects by learning the topology of a
graph convolutional network that predicts interactions. We show that our method
facilitated by this dataset establishes a strong baseline for joint hand-object
pose estimation and achieves state-of-the-art accuracy for first person
interaction recognition.

该研究提出了一个用于视角内交互识别的综合框架，利用无标记的三维手部操作物体注释，并提出一种用于创建统一数据集的方法，该数据集支持对双手和物体操作姿态的预测，并展现出在该领域的一系列前所未有的细节实现。

H2O: 第一人称交互识别中的双手物体操作

H2O: Two Hands Manipulating Objects for First Person Interaction  Recognition

Egocentric interaction recognition aims to recognize the camera wearer's
interactions with the interactor who faces the camera wearer in egocentric
videos. In such a human-human interaction analysis problem, it is crucial to
explore the relations between the camera wearer and the interactor. However,
most existing works directly model the interactions as a whole and lack
modeling the relations between the two interacting persons. To exploit the
strong relations for egocentric interaction recognition, we introduce a dual
relation modeling framework which learns to model the relations between the
camera wearer and the interactor based on the individual action representations
of the two persons. Specifically, we develop a novel interactive LSTM module,
the key component of our framework, to explicitly model the relations between
the two interacting persons based on their individual action representations,
which are collaboratively learned with an interactor attention module and a
global-local motion module. Experimental results on three egocentric
interaction datasets show the effectiveness of our method and advantage over
state-of-the-arts.

本研究提出了一种双重关系建模框架，其中包括一种新颖的交互式 LSTM 模块，一个参与者注意模块和一个全局 - 局部运动模块，以显式地建模摄像头佩戴者与交往方之间的关系，并利用此框架进行自我中心交互识别，表现出了对现有技术的优势。