TIBBİ GÖRÜNTÜLERİN GÜVENLİĞİ İÇİN İLGİ OLMAYAN BÖLGELERDE KENAR TABANLI DAMGALAMA

Son yıllarda, hastaların kişisel kayıtlarının güvenliği, tıbbi görüntülerde damgalama teknikleri kullanılarak sağlanmaktadır. Damgalama işleminin tanı ve tedaviyi etkilememesi için gizleme işlemi görüntülerdeki ilgi olmayan bölgelerde gerçekleştirilmelidir. Bu çalışmada, tıbbi görüntülerin dosya başlık kısmında yer alan hasta kişisel bilgileri ve radyoloji raporlarından oluşan gizli mesajı saldırılara karşı koruyan kör olmayan kenar tabanlı damgalama sistemi önerilmektedir. AES-256 ile şifrelenen gizli mesaj, taşıyıcı görüntülerin histogram istatistiği yöntemiyle tespit edilen ilgi olmayan bölgelerdeki piksellere yerleştirilerek görüntüye dönüştürülmüştür. Mesaj ve taşıyıcı görüntülerin Ayrık Dalgacık Dönüşümü ve Tekil Değer Ayrışımıyla bulunan tekil değerleri birleştirilerek damgalama gerçekleştirilmiştir. Çalışmada 402944 bit veri gizlenmesi sonrasında sinyalin tepe değerinin gürültüye oranı 68,33 dB olarak bulunmuştur. Medikal görüntü güvenliği için önerilen ilgi olmayan bölgelerde kenar tabanlı damgalama tekniği yüksek kapasiteli, farkedilmez ve saldırılara karşı dayanıklıdır.

Anahtar Kelimeler:

Tıbbi Görüntü Damgalama, İlgi Olmayan Bölge Belirleme, Kenar Belirleme, Tekil Değer Ayrışımı, Ayrık Dalgacık Dönüşümü

EDGE-BASED WATERMARKING IN REGIONS OF NONE INTEREST FOR THE SECURITY OF MEDICAL IMAGES

Keywords:

Medical Image Watermarking, Region of None Interest Detection, Edge Detection, Singular Value Decomposition, Discrete Wavelet Transform,

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