A MONOGENIC LOCAL GABOR BINARY PATTERN FOR FACIAL EXPRESSION RECOGNITION

Yıl 2017, Cilt: 5 Sayı: 4, 414 - 422, 01.12.2017

Alaa Eleyan Abubakar M. Ashır

https://doi.org/10.15317/Scitech.2017.101

Öz

The paper implements a monogenic-Local Binary Pattern (mono-LBP) algorithm on Local Gabor Pattern (LGP). The proposed approach initially features from the samples using LGP at different scales and orientation. The extracted LGP features are further enhanced by decomposing it into three monogenic LBP channels before being recombined to generate the final feature vector. Different Normalization schemes are applied to the final feature vector. Two best performing normalization algorithms with mono-LBP are fused at score level to obtain an improved performance using K-Nearest Neighbor classifier with L1-norm as a distance metrics. Moreover, performance comparison is done with other variants of LGP algorithm and also the effects of various normalization techniques are investigated. Experimental results from JAFFE and TFEID facial expression databases show that the new technique has improved performance compared to its counterparts.

Anahtar Kelimeler

Facial expression recognition, Local gabor patterns, Monogenic local binary patterns

Yüz İfade Tanınması İçin Bir Monojenik Yerel Gabor İkili Desen

Öz

Bu makale, yerel Gabor Desen (LGP) üzerinde monojenik-Yerel İkili Desen (mono-LBP) algoritmasını uygular. Önerilen algoritma Gabor çekirdeğinin farklı ölçeklerinde ve farklı normalizasyon şemaları ile uygulanır. Mono-LBP ile en iyi performans gösteren normalleştirme algoritmalarından elde edilen sonuçlar, geliştirilmiş bir performans elde etmek için skor düzeyinde birleştirilmiştir. Üstelik, performans karşılaştırması diğer LGP algoritmasının türevleri ile yapılmıştır ve ayrıca çeşitli normalleştirme tekniklerinin etkileri araştırılmaktadır. JAFFE yüz ifadesi veritabanında yapılan deneysel sonuçlarine göre, önerilen yaklaşım bir sınıflandırıcı olarak mesafe metrikini kullanarak mevcut algoritmalara kıyasla en iyi ortalama performansa sahip olduğunu göstermektedir.

Anahtar Kelimeler

Yüz ifade tanıma, Yerel gabor desen, Monojenik yerel ikili desen

Kaynakça

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