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All Journal Media Statistika Jurnal Masyarakat Informatika MATEMATIKA SAINS DAN MATEMATIKA JURNAL SISTEM INFORMASI BISNIS Jurnal Ilmiah Dinamika Rekayasa (DINAREK) E-Dimas: Jurnal Pengabdian kepada Masyarakat Informatika Pertanian Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control Martabe : Jurnal Pengabdian Kepada Masyarakat JISKa (Jurnal Informatika Sunan Kalijaga) Indonesian Journal of Electrical Engineering and Computer Science JPKMI (Jurnal Pengabdian Kepada Masyarakat Indonesia)
Eko Adi Sarwoko
Departemen Ilmu Komputer/Informatika Fakultas Sains Dan Matematika Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Mathematics Public Health Social Sciences

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Fast image watermarking based on signum of cosine matrix Ernawan, Ferda; Adi, Prajanto Wahyu; Liew, Siau-Chuin; Sarwoko, Eko Adi; Winarno, Edy
Indonesian Journal of Electrical Engineering and Computer Science Vol 25, No 3: March 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v25.i3.pp1383-1391

Abstract

In the field of image watermarking, the singular value decomposition has good imperceptibility and robustness, but it has high complexity.  It divides a host image into matrices of U, S, and V. Singular matrix S has been widely used for embedding and extracting watermark, while orthogonal matrices of U and V are used in decomposition and reconstruction. The proposed signum of cosine matrix method is carried out to eliminate the generation of the three matrices at each block and replace it with a signum of cosine matrix. The proposed signum of cosine matrix is performed faster on the decomposition and reconstruction. The image is transformed into a coefficient matrix C using the signum matrix. The C matrix values are closer to the S value of singular value decomposition which can preserve high quality of the watermarked image. The experimental results show that our method is able to produce similar imperceptibility and robustness level of the watermarked image with less computational time.
DIGITAL MARKETING UNTUK PEMBERDAYAAN MASYARAKAT BINAAN YAYASAN SOKOGURU UNGARAN Saputra, Ragil; Sarwoko, Eko Adi; KN, Dinar Mutiara; Rismiyati, Rismiyati; Suharto, Edy
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 4, No 1 (2021): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v4i1.123-130

Abstract

The Sokoguru Foundation is a non-governmental organization (NGO), with one of its activities which is a place for empowering the communities. After conducting an interview with the foundation managers and a survey of the member of the community, the results show that the ability to do entrepreneurship online is essential for the community. Therefore, the community services’ team provide training for the community about the use of social media, especially using Instagram to do digital marketing.This community service activity methodology uses a Participatory Rural Approach in the form of training and mentoring. The service is carried out in 3 stages: preparation, training and evaluation. Preparation is done by seeking information on material requirements for training. The training stage is carried out using an online system with Zoom Meeting (due to COVID-19 19 pandemic). Next, the training is filled with the presentation from the community service’s team, question and answer and sharing experiences.The result of the evaluation, this service activity adds new knowledge for participants (100%), usefulness (52.6%: very useful, 47.4%: useful). As well as increasing interest in online marketing by 73.7% from the previous 57%. Apart from scientific articles, the output of this activity is in the form of training modules, articles on the Kompas mass media, and video documentation on the YouTube channel.
Co-Authors Adi Wibowo Ahmad Kamsyakawuni Alfrianus Papuas Anindito Prabowo Aris Puji Widodo Aris Puji Widodo Aris Sugiharto Asep Yoyo Wardaya Bayu Surarso Betha Noranita Cynthia Damayanti Didi Supriyadi Dinar Mutiara KN Dinar Mutiara KN, Dinar Mutiara Dinar Mutiara Kusumo Nugraheni Djalal Er Riyanto Edy Suharto Edy Suharto Edy Suharto Edy Winarno Erlangga Erlangga Estrada, Rico Febrianto, Erla Rizky Ferda Ernawan Firdaus, Zulfia Guruh Aryotejo Helmi Arif Wibawa Indriyati Indriyati Josua Fredy Orlando Siahaan Kabul Kurniawan Kushartantya Kushartantya Kusworo Adi Liew, Siau-Chuin M.Pd S.T. S.Pd. I Gde Wawan Sudatha . Muhamad, Nida Muhammad Silmi Mustafid Mustafid Nazla Nurmila, Nazla Nurdin Bahtiar Prajanto Wahyu Adi, Prajanto Wahyu Priyo Sidik Sasongko Putut Sriwasito Rachmad Gernowo Ragil Ridho Putra, Ragil Ridho Ragil Saputra RISMIYATI RISMIYATI Rismiyati Rismiyati Rismiyati Rismiyati Rita Rahmawati Robertus Heri Sulistyo Utomo Roni Akbar Ryan Adiwinata Sahid Nur Afrizal, Sahid Nur Sukmawati Nur Endah Surarso Bayu Sutikno, Sutikno Yafi Yafi, Yafi Yuniarto, Muhammad Sofi Zaki Solichin