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Sistem pengukuran ketinggian air sungai berbasis deteksi tepi Sobel

River water level measurement system using Sobel edge detection method

Department of Computer Science and Electronic, Universitas Gadjah Mada. Gedung C, Lantai 4, Sekip Utara, Bulaksumur, Yogyakarta 55281, Indonesia

Received: 24 Feb 2021; Revised: 11 Dec 2021; Accepted: 20 Jan 2022; Published: 31 Jan 2022.
Open Access Copyright (c) 2022 The authors. Published by Department of Computer Engineering, Universitas Diponegoro
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract
Flood is a natural disaster that often occurs in Indonesia. Therefore, a flood warning system is required to reduce the number of losses due to flooding. In this study, a Sobel edge detection-based framework is proposed to measure the river water level, which is expected to be used as an early flood warning system. Sobel edge detection is used to determine the edge of the water surface, which is then taken by the position of the pixels, and the height is calculated by comparing the image with actual conditions. The test results of the system implemented on the prototype show that this system has an RMSE less than 0.6986 mm and can run at 12 fps which in the future can be implemented directly on rivers.
Keywords: flood; sobel edge detection; digital image processing; water level measurement
Funding: Universitas Gadjah Mada

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