One shot 3D human global pose estimation using a body symmetry constraint = 신체 대칭성을 이용한 3차원 사람 절대적 자세 추정

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I propose a deep learning algorithm that estimates 3D pose and 3D position of the human. The proposed algorithm uses 2D body joints as input and estimates the depth of each input joint. I back-project 2D body joints to 3D body joints using estimated joint depths under perspective projection assumption. Because of the ambiguity of depth estimation, I estimate the joint depth by separating it to the depth between the camera and the root of the human and the relative depth between the root of the human and each body joint. In this paper, unlike previous works that estimate two types of depth in parallel, I present a relational equation of the two types of depth based on a body symmetry constraint and use it to estimate the two types of depth sequentially. Furthermore, proposed method deals with many-to-1 matching relation between 2D pose and 3D pose which means that one 3D pose can be projected on the image plane as various 2D poses depending on the 3D position of the 3D pose. When estimating the joint depth, I encode 2D body joints with the 2D position of them in the image plane and design a novel loss to make proposed network restore a consistent 3D pose from various 2D poses generated from the 3D pose. The proposed algorithm can be applied to in-the-wild images because it minimizes the effect of the background by converting the input image into a body joint heatmap. The effectiveness of the proposed algorithm is verified by showing high pose estimation accuracy and distance estimationaccuracy for the existing 3D human pose benchmark.
Advisors
Yoon, Kuk-Jinresearcher윤국진researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2020
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2020.8,[iv, 48 p. :]

Keywords

3D human pose estimation▼ajoint depth estimation▼adistance estimation▼aposition estimation▼aDeep learning; 3차원 사람 자세 추정▼a관절 깊이 추정▼a거리 추정▼a위치 추정▼a딥러닝

URI
http://hdl.handle.net/10203/284952
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=925111&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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