Semi-automatic parking slot marking recognition for intelligent parking assist systems

• Main Author: Ho Gi Jung
• Format: Article
• Language: English
• Published: Wiley 2014-01-01
• Series: The Journal of Engineering
• Subjects: automated highways; cameras; object recognition; touch sensitive screens; user interfaces; semiautomatic parking slot marking recognition; intelligent parking assist systems; semiautomatic parking slot marking-based target position designation method; rearview image; rearward camera; touchscreen-based human machine interface; image-wise batch transformation; pixel-wise instantaneous transformation
• Online Access: http://digital-library.theiet.org/content/journals/10.1049/joe.2013.0120

This paper proposes a semi-automatic parking slot marking-based target position designation method for parking assist systems in cases where the parking slot markings are of a rectangular type, and its efficient implementation for real-time operation. After the driver observes a rearview image captured by a rearward camera installed at the rear of the vehicle through a touchscreen-based human machine interface, a target parking position is designated by touching the inside of a parking slot. To ensure the proposed method operates in real-time in an embedded environment, access of the bird's-eye view image is made efficient: image-wise batch transformation is replaced with pixel-wise instantaneous transformation. The proposed method showed a 95.5% recognition rate in 378 test cases with 63 test images. Additionally, experiments confirmed that the pixel-wise instantaneous transformation reduced execution time by 92%.