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Journal : REKAYASA

The Effect of Sunglint Correction for Estimating Water Depth Using Rationing, Thresholding, and Mean Value Algorithms Prayogo, Luhur Moekti; Basith, Abdul
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.8698

Abstract

Satellite-Derived Bathymetry (SDB) is an alternative for obtaining shallow water depth data. The existence of images with various resolutions, the availability of a complete image band can develop the extraction results. This method is based on the principle of the satellite's visible band to estimate water depth. The mapping of shallow water depth is dependent on water conditions, both its brightness and surface. When the sensor senses a water object, the reflected reflection comes from the surface, and some sensors cannot penetrate the water object. The sun's position and the sensor's point of view when sensing it results in interference from the water surface (Sunglint). The sunglint effect on the image can be reduced by performing RGB band correction with NIR Infrared. This study aims to demonstrate the effect of Sunglint's correction on three SDB approaches, namely Thresholding, Rationing, and Mean Value on Worldview 3 imagery in Karimunjawa Islands, Central Java. This study's results indicate that the Sunglint correction on Worldview 3 imagery affects the depth extraction results. The best results are shown by Sunglint's correction using the Thresholding approach (B2-B7), which produces the best correlation with R2 of 0.7364 and (B7-B2) with R2 = 0.7351. Contrastingly, the lowest correlation was generated using the Mean Value ((B2 + B7) / 2) approach without Sunglint's correction with R2 = 0.4015. So this research proves that the Worldview 3 image with Sunglint correction can provide bathymetry data, especially in shallow waters.
Perbandingan Metode Roberts’ Filter, Segmentasi dan Band Ratio Pada Citra Landsat 8 untuk Analisis Garis Pantai Prayogo, Luhur Moekti; Basith, Abdul
Rekayasa Vol 14, No 3: Desember 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i3.10300

Abstract

Computerization has an essential role in the field of remote sensing. Various methods for automatic coastline analysis continue to develop. This study aims to determine the performance of three methods, namely Roberts' Filter, Segmentation, and Band Ratio on Landsat 8 imagery, in producing land edges that are directly adjacent to the sea area (coastline). This study shows that the non-fusion image, the resulting edge, is less sharp than the fused image in the Roberts' filter method. The use of a 2x2 matrix on the Roberts' filter, the range of values from 0.52 to 0.56 in the segmentation method, and the Green Band Ratio - Near-Infrared produce various accuracy. The best method is produced by Band Ratio, where the edge detection results are close to the image's actual conditions. Meanwhile, unsatisfactory results are produced by the segmentation method.
Co-Authors 'Ilmi, Shofia Nafi'atul Abdul Majid Adi Pratama, Andika Ahmad Syaifuddin Ainu Zuhriyah Ajeng pratiwi, Shoffi Akhita, Yusrifah Justi Alfan, Aris Almaududy, Khairul U. Amelya, Rizka Ari Setiawan Arifin, Muhyiddin Zainul Aristalindra, Fauzia Atriyon Julzarika Ayulanda, Ika Badriatul Jamroh, Nurmaya Bari, Akhmad Al Dewi, Agustin Yuliana Dewi, Priyantini Dian Berkah Dian Maruto Widjonarko Dona Setya Dondiarta, Ghani Yanuargo Dwikarsa, Yahya Edi Pramono Erick Nugraha Fadhilah, Faris Fadlullah, Irfan Faizah, Mazidatul Faridatunnisa, Maritsa Farlina, Nur Fathul Jannah, Fathul Fauziah, Nainul Fikroh, Nuris Shofatul Firdaus, Rousul Firdhausyah, Ananda Ammathul Firmansyah, Ahmad Agung Fitria Lestari Gathot Winarso, Gathot Goenaryo, Goenaryo Handri, Handri Hari Rusdwi Novitasiah Hutajulu, Jerry Ikhwanudin Ikhwanudin Iksan, Iksan Indriana Rahmawati Insaniyah, Anyes Lathifatul Ira Nurmawati Kamarudin Kamarudin Khalidah Khalidah, Khalidah Khoirotus Silfiyah Koman, Wening Aisyah Fauziana Krisiati Kusumo Efyjanto, Tonny Labib, Mughni Lestari, Witri Wahyu Lia Hapsari Luhur Moekti Prayogo M, Novidayanti. Ma'mun Sarma Mahmudah, Imil MAKIAH Maman Hermawan Mandala Putra, Galih Maria, Yeni Melina, Dika Caesar Milawati Milawati Moh. Anshori Aris Widya Mualim, Rahmat Muhammad Rezza Nur Rahman Muhammad Said Husin Muhammad Saleh MUHAMMAD ULIN NUHA Muna, Nadia Nailul Muri'ah, Siti Nawafila Februyani Nawawi, Mahbub Nisak, Siti Khoirun Noer, Shafa Noer Nofitasari, Risma Septyana Noor Diani Nurlaela, Eli Oktaviani, Nadya P. Nababan, Sakti Prastyani, Ratna Prianika, Arlin Dayinta Priyasmika, Rendy Putri, Candra Avista Qurrotul Aini Rahayu Rahayu Rahmaddana, Mohamad Nazil Rahmawati, Laily Isnaini Ramlah Ramlah Renny Oktafia, Renny Rismia Agustina Rudi Masniadi Saputra, Aman Saputri, Romadhiyana Kisno Sari Mardiah, Ratu Sayekti Wahyuningsih Sentot Budi Raharjo Siti Julaiha Sudrajat, Danu Sugriwa Husen, Eddy Suharto Suharto Suharyanto Sulistyo, Devina Anintia Syamsuddin Arif Taufik Azhary Teguh Endah Saraswati Tiku, Mathius Titi Agni Hutahaen Ulinnuha, Hilmiyati Umar Sulaiman Venny, Venny Widjo Kongko, Widjo Wijaya, Abdun Wikaningtyas, Asih Wulandari, Resa Wulansari, Imelia Yani’ Qoriati Yuliana Yuliana Yusrizal Yusrizal Zetadini, Reza Zuhriya, Indah Aminatuz Zuhriyyah, Ainu