Steganografi Pada Citra Menggunakan Histogram Shifting dan Difference Expansion. (Steganography in Images Using Histogram Shifting and Difference Expansion).

Rahmat, Alif Aulia Putra (2024) Steganografi Pada Citra Menggunakan Histogram Shifting dan Difference Expansion. (Steganography in Images Using Histogram Shifting and Difference Expansion). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

Masalah yang dihadapi dalam steganografi adalah adanya distorsi yang dapat terjadi pada citra saat pesan disembunyikan di dalamnya. Distorsi pada citra merupakan efek yang timbul akibat penyisipan bit pesan kedalam citra asli sehingga mengurangi tujuan dari steganografi yang mana menyisipkan pesan kedalam citra tanpa menyebabkan perubahan pada kualitas visual. Histogram shifting dan difference expansion digunakan sebagai metode untuk penyisipan pesan. Pada penelitian ini dilakukan evaluasi kualitas citra stego menggunakan PSNR. Serta bagaimana implementasi steganografi menggunakan algoritma kombinasi Histogram�based difference expansion yang dimodifikasi. Citra hasil proses steganografi akan dianalisis dengan dua skenario pengujian, yaitu pengujian variasi alpha dan pengujian variasi payload. Alpha merupakan salah satu parameter yang menjadi bagian dari Histogram Shifting. Hasil pengujian menunjukkan jika kenaikan alpha memiliki pengaruh yang signifikan terhadap menurunnya kualitas citra. Sedangkan pada pengujian variasi payload, algoritma mampu mempertahankan kualitas citra diatas 40dB.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Histogram Shifting, Difference Expansion, PSNR, Steganografi.
Subjects:	T Technology > T Technology (General)
Divisions:	Fakultas Teknik > Program Studi Teknik Informatika
Depositing User:	1462000202 Alif Aulia Putra Rahmat
Date Deposited:	07 Sep 2001 15:27
Last Modified:	06 Oct 2001 21:12
URI:	http://repository.untag-sby.ac.id/id/eprint/31813

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