Tuz-Biber Gürültüsünde Tekrarsız Medyan Filtre

Bu çalışmada lineer olmayan alçak geçiren bir filtre geliştirilmiştir. Bu yeni yöntem yeni piksel değerine, pencere içerisinde piksellerden yeni bir küme oluşturarak karar vermektedir. Yöntemin gürültü sonuçları tuz-biber gürültüsünde test edilmiştir. Yöntemi karşılaştırmak için Peak Signal to Noise Ratio (PSNR) ve Structural Similarity (SSIM) ölçütleri kullanılmıştır. Yeni geliştirilen yöntem Median Filtre (MF) ve Adaptive Median Filtre (AMF) ile karşılaştırılmıştır. Karşılaştırma için 18 adet test görüntüsü kullanılmıştır. Örneğin lena görüntüsü için, tuz-biber gürültü yoğunluğu %30 olduğunda MF ve AMF’nin PSNR sonuçları 23.32, 25.22 çıkarken yeni yöntemde 31.29 çıkmıştır. Yeni geliştirilen yöntem 18 adet test görüntüsüne ait tüm PSNR sonuçlarında diğer yöntemlerden daha başarılı olmuştur. 

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