Çok bantlı görüntülerde pan-keskinleştirme üzerine bir inceleme

Yıl 2021, Cilt: 11 Sayı: 4, 1340 - 1357, 15.10.2021

Çiğdem Şerifoğlu Yılmaz , Volkan Yılmaz , Oğuz Güngör

https://doi.org/10.17714/gumusfenbil.972014

Öz

Uzaktan algılama uyduları, algılayıcılarındaki teknik kısıtlamalardan dolayı hem uzamsal detay kalitesi hem de spektral kalitesi yüksek görüntüler üretememektedir. Bu durum, kullanıcıları yüksek uzamsal çözünürlüklü çok bantlı görüntüler elde edebilme konusunda yeni arayışlar içine sokmaktadır. Pan-keskinleştirme işlemi bu probleme etkin bir çözüm sunmaktadır. Pan-keskinleştirme, yüksek uzamsal çözünürlüklü bir pankromatik görüntünün uzamsal detaylarının, yüksek spektral çözünürlüklü çok bantlı bir görüntüye aktarılarak uzamsal çözünürlüğü yüksek çok bantlı bir görüntü üretilmesi işlemidir. Literatürde pan-keskinleştirme için oldukça fazla sayıda yöntem geliştirilmiştir. Bu yöntemlerin her birinin kendine has avantaj ve dezavantajları vardır. Bu durum, kullanıcıları hangi durumda hangi yöntemin kullanılması gerektiği hususunda tereddüte düşürmektedir. Genel amacı, literatürdeki çeşitli konvansiyonel ve gelişmiş pan-keskinleştirme yöntemleri hakkında teorik bilgiler vermek ve bu yöntemlerin hangi durumlarda kullanılabileceği hususunda analistlere yol göstermek olan bu çalışmanın, pan-keskinleştirme hakkında iyi bir rehber olacağı kanaatindeyiz. Çalışmada, ayrıca pan-keskinleştirilmiş görüntülerin spektral ve uzamsal detay kalitelerinin görsel ve sayısal olarak nasıl değerlendirilebileceği hakkında da bilgiler verilmiştir.

Anahtar Kelimeler

Görüntü kaynaştırma, Pan-keskinleştirme, Sayısal görüntü işleme, Veri füzyonu

A review on pansharpening of multispectral images

Öz

Remote sensing satellites cannot produce images of high spatial detail quality and spectral quality due to technical limitations in their sensors, which forces users to find alternative ways to produce such images. Pan-sharpening offers an effective solution to this problem. Pan-sharpening aims to transfer the spatial details of a high-resolution panchromatic image into a high spectral resolution image, producing a multispectral image of high spatial resolution. A wide variety of pansharpening methods have been proposed in the litreture. Each pansharpening method has its own advantages and disadvantages. This situation makes users hesitant about which method should be used under what situation. We believe that this study, whose primary objective is to provide theoretical information about various conventional and state-of-the-art pan-sharpening methods in the literature, and to guide the analysts as to which pansharpening methods should be used under what circumstances, will be a good pan-sharpening guide. This study also provides information on how the spatial and spectral quality of pan-sharpened images may be evaluated qualitatively and quantitatively.

Anahtar Kelimeler

Image fusion, Pan-sharpening, Digital image processing, Data fusion

Kaynakça

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