TEXTURE RECOGNITION USING IMPORTANCE BASED ONE-CLASS CLASSIFIER

Öz

Texture recognition by Single-Class Classifier (SCC) refers to the problem of recognizing the target texture by using only the training data pertaining to the texture under concern. In this study, a texture classifier, based on the estimation of importance, is proposed. Importance is calculated as the ratio of two density functions obtained from the training and test data. Since the importance value is close to the one if the inputted test and target class data are similar to each other, classification is performed by appliying a thresholding process to the obtained importance values. Importance is estimated by Unconstrained Least Square Importance Fitting (uLSIF) algorithm. The effectiveness of the proposed method is examined on different texture sets with different classification metrics. Our results show that the proposed algorithm is powerful and reliable in SCC problems. Results are also compared with the one-class support vector machines which is the reference algorithm in the literature and higher SCC performance is obtained with the proposed method for applied textures

Anahtar Kelimeler

• Importance Estimation, Density Distribution, One Class Classification, Texture Recognition

ÖNEM TAHMİNLEME TABANLI TEK SINIF SINIFLAYICI İLE DOKU TANIMA

Öz

Tek Sınıf Sınıflayıcı (TSS) ile doku tanıma, farklı sınıflara ait dokular içinde sadece ilgilenilen hedef dokuya ilişkin eğitim verileri ile hedef dokunun tanınması problemidir. Bu çalışmada, önem değerinin tahminlenmesine dayanan bir doku sınıflayıcı önerilmiştir. Önem değeri, test ve eğitim verilerinden elde edilen yoğunluk fonksiyonlarının oranından hesap edilmiştir. Girilen test verisi ile hedef sınıf verisi birbirine benzer ise önem değeri bire yakın olduğundan elde edilen önem değerlerine eşikleme işlemi uygulanarak sınıflama işlemi gerçeklenmiştir. Önem değeri, Kısıtsız En Küçük Kareler Önem Uydurma (KEKK-ÖU) yöntemi ile elde edilmiştir. Önerilen yöntemin etkinliği, farklı doku setleri üzerinde farklı sınıflama ölçütleri ile değerlendirilmiştir. Elde edilen sonuçlar önerilen yöntemin TSS problemlerinde başarılı ve güvenilir olduğunu göstermektedir. Sonuçlar, ayrıca literatürde referans yöntem olarak alınan tek-sınıf destek vektör makinaları yöntemine göre de karşılaştırılmış ve önerilen yöntem ile daha yüksek TSS başarım performansı elde edilmiştir

Anahtar Kelimeler

• Önem Tahminleme, Yoğunluk Dağılım, Tek Sınıf Sınıflayıcı,Doku Tanıma

Kaynakça

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