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Sensors 2012, 12(4), 4431-4446;

A Vision Based Top-View Transformation Model for a Vehicle Parking Assistant

Department of Engineering Science, National Cheng Kung University Taiwan, No.1, University Road, Tainan City 701, Taiwan
Author to whom correspondence should be addressed.
Received: 16 March 2012 / Revised: 29 March 2012 / Accepted: 30 March 2012 / Published: 30 March 2012
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [642 KB, uploaded 21 June 2014]


This paper proposes the Top-View Transformation Model for image coordinate transformation, which involves transforming a perspective projection image into its corresponding bird’s eye vision. A fitting parameters searching algorithm estimates the parameters that are used to transform the coordinates from the source image. Using this approach, it is not necessary to provide any interior and exterior orientation parameters of the camera. The designed car parking assistant system can be installed at the rear end of the car, providing the driver with a clearer image of the area behind the car. The processing time can be reduced by storing and using the transformation matrix estimated from the first image frame for a sequence of video images. The transformation matrix can be stored as the Matrix Mapping Table, and loaded into the embedded platform to perform the transformation. Experimental results show that the proposed approaches can provide a clearer and more accurate bird’s eye view to the vehicle driver. View Full-Text
Keywords: top-view transformation; bird’s eye view; inverse perspective mapping top-view transformation; bird’s eye view; inverse perspective mapping
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Lin, C.-C.; Wang, M.-S. A Vision Based Top-View Transformation Model for a Vehicle Parking Assistant. Sensors 2012, 12, 4431-4446.

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