Watermarking Citra Berwarna dengan Optimasi Schur Decomposition

• AHMAD TOHA
• 14210158

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ABSTRAK

ABSTRAK

Nama               : Ahmad Toha
NIM                  : 14210158
Program Studi  : Ilmu Komputer
Fakultas            : Teknologi Informasi
Jenjang             : Strata Dua (S2)
Konsentrasi       : Software Engineering
Judul        : "Watermarking Citra Berwarna dengan Optimasi Schur Decomposition"

Dengan pesatnya perkembangan teknologi komputer, perlindungan hak cipta gambar berwarna menjadi masalah yang semakin mendesak. Penelitian sebelumnya mengusulkan matriks pada blok sebesar 4×4 akan tetapi tidak mempertimbangkan robustness performance. Kami mengusulkan sebuah skema watermarking gambar berwarna yang ditingkatkan berdasarkan dekomposisi Schur, Dengan menganalisis matriks pada blok sebesar 8×8 U dan matriks segitiga atas D dari dekomposisi Schur, kami menemukan bahwa tidak hanya kolom penyisipan e dari matriks U ditentukan oleh kolom dengan nilai eigen tertinggi dari matriks D, tetapi juga entri antara baris ke-dua dan kolom ke-c serta baris ke-enam dan kolom ke-c dalam matriks U memiliki kesamaan yang kuat. Sifat-sifat ini digunakan untuk menyematkan dan mengekstrak watermark dengan cara yang tak terlihat. Penggunaan fitur hasil dekomposisi Schur untuk menyematkan atau mengekstrak watermark dengan cara tidak terlihat; Watermark yang disematkan adalah gambar berwarna yang memiliki lebih banyak informasi watermark dibandingkan dengan urutan acak, gambar biner, atau gambar tingkat abu-abu. Hasil eksperimen menunjukkan bahwa algoritma watermarking yang diusulkan memiliki kinerja yang lebih baik, seperti dalam aspek ketidakterlihatan, ketangguhan, kompleksitas komputasi, keamanan, dan kapasitas, dibandingkan dengan metode yang diusulkan lainnya dalam penelitian ini.
Secara khusus untuk citra Barbara, metode yang diusulkan menghasilkan nilai SSIM tertinggi yaitu 0.9906 yang artinya kualitas visualnya yang paling baik di antara citra lainnya. Sementara itu, citra F16 memiliki nilai SSIM terendah yaitu 0.8049, menunjukkan kualitas visual yang sedikit lebih rendah dibandingkan dengan citra-citra lainnya.

KATA KUNCI

Watermark gambar berwarna,Schur decomposition,Nilai Eigen tertinggi

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DAFTAR PUSTAKA

DAFTAR PUSTAKA

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