Recently, fully-transformer architectures have replaced the defacto
convolutional architecture for the 3D human pose estimation task. In this paper
we propose \textbf{\textit{ConvFormer}}, a novel convolutional transformer that
leverages a new \textbf{\textit{dynamic multi-headed convolutional
self-attention}} mechanism for monocular 3D human pose estimation. We designed
a spatial and temporal convolutional transformer to comprehensively model human
joint relations within individual frames and globally across the motion
sequence. Moreover, we introduce a novel notion of \textbf{\textit{temporal
joints profile}} for our temporal ConvFormer that fuses complete temporal
information immediately for a local neighborhood of joint features. We have
quantitatively and qualitatively validated our method on three common benchmark
datasets: Human3.6M, MPI-INF-3DHP, and HumanEva. Extensive experiments have
been conducted to identify the optimal hyper-parameter set. These experiments
demonstrated that we achieved a \textbf{significant parameter reduction
relative to prior transformer models} while attaining State-of-the-Art (SOTA)
or near SOTA on all three datasets. Additionally, we achieved SOTA for Protocol
III on H36M for both GT and CPN detection inputs. Finally, we obtained SOTA on
all three metrics for the MPI-INF-3DHP dataset and for all three subjects on
HumanEva under Protocol II.

本文提出了 ConvFormer：一种新型的卷积变压器，新增了一种动态的多头卷积自注意机制用于单目 3D 人体姿势估计。通过对人体各关节点之间的关系进行建模，利用时间关节特征的新概念进行完全的时间信息融合，成功地在三个基准数据集上实现了 SOTA 水平的结果，相对于以前的变压器模型取得了显著的参数降低。