Görünür Dalgaboyu Ortamlarında Daha İyi İris Segmentasyonu için Göz Renklerinden Yararlanma

Öz

İris segmentasyonu, iris tanıma sistemlerinde çok önemli bir adımdır. Görünür dalga boyu ve sınırsız ortamlarda iris segmentasyonu, ideal ortamlarda IRIS görüntülerini segmentlere ayırmaktan daha zordur. Bu makale, iris bölgesini daha doğru bir şekilde segmentlere ayırmak için insan gözlerinin rengini kullanan yeni bir iris segmentasyon yöntemi önermektedir. Mevcut iris segmentasyon yöntemlerinin çoğu irisin rengini görmezden gelirken veya gri tonlamalı göz görüntüleri ile doğrudan ilgilenirken, önerilen yöntem iris segmentasyon adımını basitleştirmek için iris renginden faydalanır. İlk adımda, beklenen iris merkezini HAAR benzeri özellikler kullanarak tahmin ediyoruz. Iris rengi tespit edilir ve buna göre, iris bölgesini bulmak için bir renk bağlayıcı segmentasyon algoritması uygulanır. Her IRIS renk seti ile ayrı ayrı ele alınmak, yanlış segmentasyon hatalarını önemli ölçüde azaltır ve iris tanıma sisteminin performansını artırır. Ubiris veritabanında önerilen algoritmanın test edilmesinin sonuçları, algoritmamızın farklı gürültü faktörlerine ve ideal olmayan koşullara karşı sağlamlığını göstermektedir.

Anahtar Kelimeler

• İris segmentasyonu
• görünür dalga boyu Iris görüntüleri
• renk tabanlı iris segmentasyonu
• göz rengi sınıflandırması
• kısıtlanmamış iris tanıma

Exploiting Eye Colors for Better Iris Segmentation in Visible Wavelength Environments

Öz

Iris segmentation is a crucial step in iris recognition systems. Iris segmentation in visible wavelength and unconstrained environments is more challenging than ‎segmenting iris images in ideal environments. This paper proposes a new iris segmentation method that exploits the color of human eyes to segment the iris region more accurately. While most of the current iris segmentation methods ignore the color of the iris or deal with ‎grayscale eye images directly, the proposed method takes benefits from iris color to simplify the iris segmentation step. In the first step, we estimate the expected iris center using Haar-like features. The iris color is detected and accordingly, a color-convenient segmentation algorithm is applied to find the iris region. Dealing separately with each iris color set significantly decreases the false segmentation errors and enhances the performance of the iris recognition system. The results of testing the proposed algorithm on the UBIRIS database demonstrate the robustness of our algorithm against different noise factors and non-ideal conditions.

Anahtar Kelimeler

• iris segmentation
• visible wavelength iris images
• color-based iris segmentation
• eye color classification
• unconstrained iris recognition

Kaynakça

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