Existing region-based object detectors are limited to regions with fixed box geometry to represent objects, even if those are highly non-rectangular. In this paper we introduce DP-FCN, a deep model for object detection which explicitly adapts to shapes of objects with deformable parts. Without additional annotations, it learns to focus on discriminative elements and to align them, and simultaneously brings more invariance for classification and geometric information to refine localization. DP-FCN is composed of three main modules: a Fully Convolutional Network to efficiently maintain spatial resolution, a deformable part-based RoI pooling layer to optimize positions of parts and build invariance, and a deformation-aware localization module explicitly exploiting displacements of parts to improve accuracy of bounding box regression. We experimentally validate our model and show significant gains. DP-FCN achieves state-of-the-art performances of 83.1% and 80.9% on PASCAL VOC 2007 and 2012 with VOC data only.

本文提出了DP-FCN，一种深度学习模型，可专门适应具有可变形部件的对象形状，从而实现目标检测，其主要模块包括：完全卷积网络、基于可变形部件的RoI池化层和变形感知定位模块，实验证明DP-FCN在PASCAL VOC 2007和2012数据集上均取得了83.1%和80.9%的最新性能表现。

基于可变形部件的全卷积网络用于目标检测