In this paper, we are interested in bottom-up multi-person human pose estimation. A typical bottom-up pipeline consists of two main steps: heatmap prediction and keypoint grouping. We mainly focus on the first step for improving heatmap prediction accuracy. We propose Higher-Resolution Network (HigherHRNet), which is a simple extension of the High-Resolution Network (HRNet). HigherHRNet generates higher-resolution feature maps by deconvolving the high-resolution feature maps outputted by HRNet, which are spatially more accurate for small and medium persons. Then, we build high-quality multi-level features and perform multi-scale pose prediction. The extra computation overhead is marginal and negligible in comparison to existing bottom-up methods that rely on multi-scale image pyramids or large input image size to generate accurate pose heatmaps. HigherHRNet surpasses all existing bottom-up methods on the COCO dataset without using multi-scale test. The code and models will be released.

这篇论文提出了HigherHRNet，一种新的从下往上的人体姿态估计方法，使用高分辨率特征金字塔学习尺度感知表示，具有多分辨率监督训练和多分辨率聚合推理的能力，能够解决下向多人姿势估计中的尺度变化挑战，从而更精确地定位关键点，尤其适用于小尺寸人体，实现了比以前最好的下向方法在COCO test-dev中中等人体上2.5% AP的提高。在CrowdPose test上，HigherHRNet甚至超过了所有自上而下的方法，表明其在拥挤场景中具有鲁棒性。

HigherHRNet：基于比例感知的自下而上人体姿势估计表示学习