Non-Blind Watermarking Menggunakan Discrete dan Wavelet Transform

Daurat Sinaga; Cahaya Jatmoko

doi:10.14710/jmasif.13.1.43714

DOI: https://doi.org/10.14710/jmasif.13.1.43714

Non-Blind Watermarking Menggunakan Discrete dan Wavelet Transform

Daurat Sinaga , Cahaya Jatmoko

Universitas Dian Nuswantoro, Indonesia

Received: 30 Dec 2021; Revised: 3 May 2022; Accepted: 9 May 2022; Available online: 27 May 2022; Published: 27 May 2022.

Editor(s): Guruh Aryotejo

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract

Pada zaman sekarang orang mudah untuk mengakses internet sehingga semua orang dapat memperoleh suatu karya seni digital seperti gambar dengan mudah, kemudian seseorang dapat memodifikasi dan menyebarkan kembali karya tersebut tanpa izin atau tanpa memberikan sumber originalnya. Pada masalah ini dibutuhkan upaya untuk memberikan watermark yang tidak terlihat sehingga tidak mudah untuk menghilangkan watermark gambar tersebut, menggunakan kombinasi DCT dan DWT 1 level untuk memberikan watermark secara tak terlihat pada suatu karya seni. Dari metode kombinasi DCT-DWT diperoleh dengan gambar watermark 64x64 nilai PSNR 39.1529 dB dari hasil tersebut dapat disimpulkan bahwa metode kombinasi DCT-DWT mendapatkan nilai imperceptibility yang baik. Ketahanan gambar diuji dari berbagai proses maipulasi gambar seperti noise, filter, kompresi JPG, dan lain-lain. Hasil dari manipulasi gambar mendapatkan rata-rata NCC bernilai lebih dari 0.6 sehingga dapat disimpulkan metode DCT-DWT tahan (robust) terhadap beberapa serangan citra.

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Keywords: imperceptibility; robust; metode kombinasi DCT-DWT; watermark

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Section: Research Article

Language : ID

In Vol 13, No 1 (2022): JURNAL MASYARAKAT INFORMATIKA

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