We present Convolutional Oriented Boundaries (COB), which produces multiscale
oriented contours and region hierarchies starting from generic image
classification Convolutional Neural Networks (CNNs). COB is computationally
efficient, because it requires a single CNN forward pass for multi-scale
contour detection and it uses a novel sparse boundary representation for
hierarchical segmentation; it gives a significant leap in performance over the
state-of-the-art, and it generalizes very well to unseen categories and
datasets. Particularly, we show that learning to estimate not only contour
strength but also orientation provides more accurate results. We perform
extensive experiments for low-level applications on BSDS, PASCAL Context,
PASCAL Segmentation, and NYUD to evaluate boundary detection performance,
showing that COB provides state-of-the-art contours and region hierarchies in
all datasets. We also evaluate COB on high-level tasks when coupled with
multiple pipelines for object proposals, semantic contours, semantic
segmentation, and object detection on MS-COCO, SBD, and PASCAL; showing that
COB also improves the results for all tasks.

本文提出了一种名为 Convolutional Oriented Boundaries (COB) 的方法，该方法通过图像分类卷积神经网络（CNNs）产生多尺度的定向轮廓和区域层次结构，其具有高效的计算性能和显著的识别性能，并且泛化性能也很好。我们在多个数据集上验证了 COB 的性能，并通过与不同任务的结合，如目标提议，语义轮廓，语义分割和目标检测等，证明 COB 在提高多种任务的性能方面也具有良好的效果。

卷积定向边界：从图像分割到高级任务

Convolutional Oriented Boundaries: From Image Segmentation to High-Level  Tasks

We present Convolutional Oriented Boundaries (COB), which produces multiscale
oriented contours and region hierarchies starting from generic image
classification Convolutional Neural Networks (CNNs). COB is computationally
efficient, because it requires a single CNN forward pass for contour detection
and it uses a novel sparse boundary representation for hierarchical
segmentation; it gives a significant leap in performance over the
state-of-the-art, and it generalizes very well to unseen categories and
datasets. Particularly, we show that learning to estimate not only contour
strength but also orientation provides more accurate results. We perform
extensive experiments on BSDS, PASCAL Context, PASCAL Segmentation, and
MS-COCO, showing that COB provides state-of-the-art contours, region
hierarchies, and object proposals in all datasets.

本研究提出了基于 CNN 的 Convolutional Oriented Boundaries (COB) 算法，实现图像多尺度的边缘检测和分层分割。该算法具有较高的计算效率和泛化能力，并在多个数据集上取得了最优表现。