Person re-identification (reID) aims to match person images to retrieve the
ones with the same identity. This is a challenging task, as the images to be
matched are generally semantically misaligned due to the diversity of human
poses and capture viewpoints, incompleteness of the visible bodies (due to
occlusion), etc. In this paper, we propose a framework that drives the reID
network to learn semantics-aligned feature representation through delicate
supervision designs. Specifically, we build a Semantics Aligning Network (SAN)
which consists of a base network as encoder (SA-Enc) for re-ID, and a decoder
(SA-Dec) for reconstructing/regressing the densely semantics aligned full
texture image. We jointly train the SAN under the supervisions of person
re-identification and aligned texture generation. Moreover, at the decoder,
besides the reconstruction loss, we add Triplet ReID constraints over the
feature maps as the perceptual losses. The decoder is discarded in the
inference and thus our scheme is computationally efficient. Ablation studies
demonstrate the effectiveness of our design. We achieve the state-of-the-art
performances on the benchmark datasets CUHK03, Market1501, MSMT17, and the
partial person reID dataset Partial REID. Code for our proposed method is
available at:
this https URL

本论文提出了一种通过细致的监督设计，驱动重新识别网络学习语义对齐特征表示的框架，其中包括了一个带编码器（SA-Enc）的 Semantics Aligning Network (SAN) 用于重新识别，以及一个解码器（SA-Dec）用于重建 / 回归密集语义对齐全纹理图像，并在三元组 ReID 约束下增加感知损失，以确保推断的计算效率。该设计取得了基准数据集 CUHK03，Market1501，MSMT17 和部分人物重新 ID 数据集 Partial REID 等的最佳表现。