Havasal Görüntülerdeki Sahnelerin Derin Öğrenme Modelleri ile Sınıflandırılması

Öz

Havadan alınan görüntülerin otomatik olarak sınıflandırılması son yıllarda üzerinde yoğun çalışılan konulardan biri haline gelmiştir. Özellikle drone'ların tarımsal uygulamalar, akıllı şehir uygulamaları, gözetleme ve güvenlik uygulamaları gibi farklı alanlarda kullanımı için otonom görev icrası sırasında kamera ile elde edilen görüntülerin otomatik olarak sınıflandırılması gerekmektedir. Bu amaçla araştırmacılar yeni veri setleri oluşturmuş ve yüksek doğruluk elde etmek için bazı bilgisayarla görme yöntemleri geliştirilmiştir. Ancak geliştirilen yöntemlerin doğruluğunun artırılmasının yanı sıra hesaplama karmaşıklığının da azaltılması gerekmektedir. Çünkü drone gibi enerji tüketiminin önemli olduğu cihazlarda kullanılacak yöntemlerin düşük hesaplama karmaşıklığına sahip olması gerekmektedir. Bu çalışmada, öncelikle hava görüntülerinin sınıflandırılmasında yüksek doğruluk değerleri elde etmek için beş farklı derin öğrenme modeli kullanılmıştır. Bu modeller arasında en yüksek doğruluğu %94.21 ile VGG19 modeli elde etmiştir. Çalışmanın ikinci bölümünde bu modelin parametreleri analiz edilerek model yeniden yapılandırılmıştır. VGG19 modelinin 143,6 milyon olan parametre sayısı 34 milyona düşürülmüştür. Parametre sayısının azaltılmasıyla elde edilen modelin doğruluğu aynı test verileri üzerinde %93,56'dır. Böylece parametre oranındaki %66,5'lik azalmaya rağmen doğruluk değerinde sadece %0,7'lik bir azalma olmuştur. Elde edilen sonuçlar önceki çalışmalarla karşılaştırıldığında, daha iyi sonuçların elde edildiği görülmüştür.

Anahtar Kelimeler

• Havasal görüntülerin sınıflandırması
• Derin Öğrenme
• Model Budama
• VGG19
• Aerial images classification
• Deep learning
• Pruning

Classification of Scenes in Aerial Images with Deep Learning Models

Abstract

Automatic classification of aerial images has become one of the topics studied in recent years. Especially for the use of drones in different fields such as agricultural applications, smart city applications, surveillance and security applications, it is necessary to automatically classify the images obtained with the camera during autonomous mission execution. For this purpose, researchers have created new data sets and some computer vision methods have been developed to achieve high accuracy. However, in addition to increasing the accuracy of the developed methods, the computational complexity should also be reduced. Because the methods to be used in devices such as drones where energy consumption is important should have low computational complexity. In this study, firstly, five different state-of-art deep learning models were used to obtain high accuracy values in the classification of aerial images. Among these models, the VGG19 model achieved the highest accuracy with 94.21%. In the second part of the study, the parameters of this model were analyzed and the model was reconstructed. The number of 143.6 million parameters of the VGG19 model was reduced to 34 million. The accuracy of the model obtained by reducing the number of parameters is 93.56% on the same test data. Thus, despite the 66.5% decrease in the parameter ratio, there was only a 0.7% decrease in the accuracy value. When compared to previous studies, the results show improved performance.

Keywords

• Aerial images classification
• Deep Learning
• Pruning
• VGG19

Kaynakça

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