Wave runup video detection using the Radon Transform

Rafael Almar; Christopher Blenkinsopp; Luis Pedro Almeida; Rodrigo Cienfuegos; P Catalan

doi:10.1016/j.coastaleng.2017.09.015

Wave runup video detection using the Radon Transform

Rafael Almar, Christopher Blenkinsopp, Luis Pedro Almeida, Rodrigo Cienfuegos, P Catalan

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Abstract

A new method of runup detection from video imagery is introduced and validated at an energetic dissipative beach. The instantaneous waterline is detected from uprush and backwash by using the Radon Transform (RT). The method is compared to conventional color contrast method from RGB images and LiDAR measurements. In our observations, the RT shows better detection skill even for adverse conditions, such as those present on flat dissipative swash zones where contrast is reduced. Because the RT is a proxy of deeper waterline (~0.1 m) it is less sensitive to lack of contrast due to sand saturation. Moreover, since it is based on motion detection, it is less sensitive to changes in lighting conditions. Overall, the RT offers an ttractive
alternative for long term automated detection of the runup.

Original language	English
Pages (from-to)	46-51
Number of pages	6
Journal	Coastal Engineering
Volume	130
Early online date	11 Oct 2017
DOIs	https://doi.org/10.1016/j.coastaleng.2017.09.015
Publication status	Published - Dec 2017

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10.1016/j.coastaleng.2017.09.015

CENG-D-17-00010R3Accepted author manuscript, 357 KBLicence: CC BY-NC-ND

Waves in Shallow Water
Blenkinsopp, C. (PI)
Engineering and Physical Sciences Research Council
15/02/16 → 8/10/17
Project: Research council

Chris Blenkinsopp
- C.Blenkinsoppbath.acuk
Person: Research & Teaching, Core staff, Affiliate staff

Cite this

@article{350a9d8951b74155a832457bc3a0f67b,

title = "Wave runup video detection using the Radon Transform",

abstract = "A new method of runup detection from video imagery is introduced and validated at an energetic dissipative beach. The instantaneous waterline is detected from uprush and backwash by using the Radon Transform (RT). The method is compared to conventional color contrast method from RGB images and LiDAR measurements. In our observations, the RT shows better detection skill even for adverse conditions, such as those present on flat dissipative swash zones where contrast is reduced. Because the RT is a proxy of deeper waterline (~0.1 m) it is less sensitive to lack of contrast due to sand saturation. Moreover, since it is based on motion detection, it is less sensitive to changes in lighting conditions. Overall, the RT offers an ttractivealternative for long term automated detection of the runup.",

author = "Rafael Almar and Christopher Blenkinsopp and Almeida, {Luis Pedro} and Rodrigo Cienfuegos and P Catalan",

year = "2017",

month = dec,

doi = "10.1016/j.coastaleng.2017.09.015",

language = "English",

volume = "130",

pages = "46--51",

journal = "Coastal Engineering",

issn = "0378-3839",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Wave runup video detection using the Radon Transform

AU - Almar, Rafael

AU - Blenkinsopp, Christopher

AU - Almeida, Luis Pedro

AU - Cienfuegos, Rodrigo

AU - Catalan, P

PY - 2017/12

Y1 - 2017/12

N2 - A new method of runup detection from video imagery is introduced and validated at an energetic dissipative beach. The instantaneous waterline is detected from uprush and backwash by using the Radon Transform (RT). The method is compared to conventional color contrast method from RGB images and LiDAR measurements. In our observations, the RT shows better detection skill even for adverse conditions, such as those present on flat dissipative swash zones where contrast is reduced. Because the RT is a proxy of deeper waterline (~0.1 m) it is less sensitive to lack of contrast due to sand saturation. Moreover, since it is based on motion detection, it is less sensitive to changes in lighting conditions. Overall, the RT offers an ttractivealternative for long term automated detection of the runup.

AB - A new method of runup detection from video imagery is introduced and validated at an energetic dissipative beach. The instantaneous waterline is detected from uprush and backwash by using the Radon Transform (RT). The method is compared to conventional color contrast method from RGB images and LiDAR measurements. In our observations, the RT shows better detection skill even for adverse conditions, such as those present on flat dissipative swash zones where contrast is reduced. Because the RT is a proxy of deeper waterline (~0.1 m) it is less sensitive to lack of contrast due to sand saturation. Moreover, since it is based on motion detection, it is less sensitive to changes in lighting conditions. Overall, the RT offers an ttractivealternative for long term automated detection of the runup.

U2 - 10.1016/j.coastaleng.2017.09.015

DO - 10.1016/j.coastaleng.2017.09.015

M3 - Article

SN - 0378-3839

VL - 130

SP - 46

EP - 51

JO - Coastal Engineering

JF - Coastal Engineering

ER -

Wave runup video detection using the Radon Transform

Abstract

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