A Universal Vacant Parking Slot Recognition System Using Sensors Mounted on Off-the-Shelf Vehicles

An automatic parking system is an essential part of autonomous driving, and it starts by recognizing vacant parking spaces. This paper proposes a method that can recognize various types of parking slot markings in a variety of lighting conditions including daytime, nighttime, and underground. The pr...

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Main Authors: Jae Kyu Suhr, Ho Gi Jung
Format: Article
Language:English
Published: MDPI AG 2018-04-01
Series:Sensors
Subjects:
Online Access:http://www.mdpi.com/1424-8220/18/4/1213
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author Jae Kyu Suhr
Ho Gi Jung
author_facet Jae Kyu Suhr
Ho Gi Jung
author_sort Jae Kyu Suhr
collection DOAJ
description An automatic parking system is an essential part of autonomous driving, and it starts by recognizing vacant parking spaces. This paper proposes a method that can recognize various types of parking slot markings in a variety of lighting conditions including daytime, nighttime, and underground. The proposed method can readily be commercialized since it uses only those sensors already mounted on off-the-shelf vehicles: an around-view monitor (AVM) system, ultrasonic sensors, and in-vehicle motion sensors. This method first detects separating lines by extracting parallel line pairs from AVM images. Parking slot candidates are generated by pairing separating lines based on the geometric constraints of the parking slot. These candidates are confirmed by recognizing their entrance positions using line and corner features and classifying their occupancies using ultrasonic sensors. For more reliable recognition, this method uses the separating lines and parking slots not only found in the current image but also found in previous images by tracking their positions using the in-vehicle motion-sensor-based vehicle odometry. The proposed method was quantitatively evaluated using a dataset obtained during the day, night, and underground, and it outperformed previous methods by showing a 95.24% recall and a 97.64% precision.
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spelling doaj.art-26e8676a738840d7b3a391687587aa562022-12-22T02:55:23ZengMDPI AGSensors1424-82202018-04-01184121310.3390/s18041213s18041213A Universal Vacant Parking Slot Recognition System Using Sensors Mounted on Off-the-Shelf VehiclesJae Kyu Suhr0Ho Gi Jung1School of Intelligent Mechatronics Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, KoreaDepartment of Electronic Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju-si, Chungbuk 27469, KoreaAn automatic parking system is an essential part of autonomous driving, and it starts by recognizing vacant parking spaces. This paper proposes a method that can recognize various types of parking slot markings in a variety of lighting conditions including daytime, nighttime, and underground. The proposed method can readily be commercialized since it uses only those sensors already mounted on off-the-shelf vehicles: an around-view monitor (AVM) system, ultrasonic sensors, and in-vehicle motion sensors. This method first detects separating lines by extracting parallel line pairs from AVM images. Parking slot candidates are generated by pairing separating lines based on the geometric constraints of the parking slot. These candidates are confirmed by recognizing their entrance positions using line and corner features and classifying their occupancies using ultrasonic sensors. For more reliable recognition, this method uses the separating lines and parking slots not only found in the current image but also found in previous images by tracking their positions using the in-vehicle motion-sensor-based vehicle odometry. The proposed method was quantitatively evaluated using a dataset obtained during the day, night, and underground, and it outperformed previous methods by showing a 95.24% recall and a 97.64% precision.http://www.mdpi.com/1424-8220/18/4/1213automatic parking systemparking slot recognitionaround-view monitor (AVM) systemsensor fusion
spellingShingle Jae Kyu Suhr
Ho Gi Jung
A Universal Vacant Parking Slot Recognition System Using Sensors Mounted on Off-the-Shelf Vehicles
Sensors
automatic parking system
parking slot recognition
around-view monitor (AVM) system
sensor fusion
title A Universal Vacant Parking Slot Recognition System Using Sensors Mounted on Off-the-Shelf Vehicles
title_full A Universal Vacant Parking Slot Recognition System Using Sensors Mounted on Off-the-Shelf Vehicles
title_fullStr A Universal Vacant Parking Slot Recognition System Using Sensors Mounted on Off-the-Shelf Vehicles
title_full_unstemmed A Universal Vacant Parking Slot Recognition System Using Sensors Mounted on Off-the-Shelf Vehicles
title_short A Universal Vacant Parking Slot Recognition System Using Sensors Mounted on Off-the-Shelf Vehicles
title_sort universal vacant parking slot recognition system using sensors mounted on off the shelf vehicles
topic automatic parking system
parking slot recognition
around-view monitor (AVM) system
sensor fusion
url http://www.mdpi.com/1424-8220/18/4/1213
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