Arbitrary-Oriented Object Detection in Remote Sensing Images Based on Polar Coordinates

Arbitrary-oriented object detection is an important task in the field of remote sensing object detection. Existing studies have shown that the polar coordinate system has obvious advantages in dealing with the problem of rotating object modeling, that is, using fewer parameters to achieve more accur...

Full description

Saved in:
Bibliographic Details
Published in:IEEE access 2020, Vol.8, p.223373-223384
Main Authors: Zhou, Lin, Wei, Haoran, Li, Hao, Zhao, Wenzhe, Zhang, Yi, Zhang, Yue
Format: Article
Language:English
Subjects:
anchor free
Angles (geometry)
Cartesian coordinates
Deep learning
Detectors
Feature extraction
Geometric constraints
Model accuracy
Object detection
Object recognition
oriented detection
Parameters
Polar coordinates
Proposals
Regression models
Remote sensing
Remote sensing images
Rotation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Arbitrary-oriented object detection is an important task in the field of remote sensing object detection. Existing studies have shown that the polar coordinate system has obvious advantages in dealing with the problem of rotating object modeling, that is, using fewer parameters to achieve more accurate rotating object detection. However, present state-of-the-art detectors based on deep learning are all modeled in Cartesian coordinates. In this article, we introduce the polar coordinate system to the deep learning detector for the first time, and propose an anchor free Polar Remote Sensing Object Detector (P-RSDet), which can achieve competitive detection accuracy via using simpler object representation model and less regression parameters. In P-RSDet method, arbitrary-oriented object detection can be achieved by predicting the center point and regressing one polar radius and two polar angles. Besides, in order to express the geometric constraint relationship between the polar radius and the polar angle, a Polar Ring Area Loss function is proposed to improve the prediction accuracy of the corner position. Experiments on DOTA, UCAS-AOD and NWPU VHR-10 datasets show that our P-RSDet achieves state-of-the-art performances with simpler model and less regression parameters.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.3041025