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Ikromina FI. INVISIBLE WATERMARKING CITRA DIGITAL MENGGUNAKAN KOMBINASI METODE DISCRETE COSINE TRANSFORM DAN DISCRETE WAVELET TRANSFORM. j. nas. pendidik. teknik. inform. [Internet]. 2020 Jan. 4 [cited 2024 May 8];8(3):261-7. Available from: https://ejournal.undiksha.ac.id/index.php/janapati/article/view/22177