Photogrammetric 3D Modelling Potential Comparison of SFM-Based New Generation Image Matching Software

Year 2020, Volume 2, Issue 2, 39 - 45, 29.12.2020

Umut Gunes SEFERCİK Feride TANRIKULU Can ATALAY

Abstract

Structure from motion (SFM) matching algorithm is the basic principle of new generation and widely used image matching software. Although these software work in common principle, their final products may contain different characteristics and distortions depending on their buried parameters. In the literature, there is lack of publishments which compare the three dimensional modelling performance of SFM based new generation software. Accordingly, our research group decided to carry out a study that could be a reference for upcoming researches. In this study, using VisualSFM, Agisoft and Pix4D SFM based image matching software, 3D digital surface models (DSM) were generated from unmanned air vehicle (UAV) high resolution aerial photos in a Campus of Zonguldak Bulent Ecevit University. Generated DSMs were comprehensively evaluated and compared by visual and statistical approaches utilizing the Agisoft DSM as the reference. The results clearly demonstrated the pros and cons of each analyzed SFM-based software.

Keywords

SFM, VisualSFM, Agisoft, Pix4D, Digital Surface Model

SFM Tabanlı Yeni Nesil Görüntü Eşleştirme Yazılımlarının Fotogrametrik 3B Modelleme Potansiyellerinin Karşılaştırması

Abstract

Lokal hareket işaretleri ile iki boyutlu görüntü dizilerinin birleşiminden üç boyutlu (3B) yapıları kestirebilmek için geliştirilmiş Hareketten Yapı (Structure From Motion, SFM) fotogrametrik görüntü eşleştirme algoritması, yeni nesil ve yaygın olarak kullanılan bulut tabanlı görüntü eşleştirme yazılımlarının temel prensibidir. Bu yazılımlar ortak prensipte çalışmasına rağmen, kullanıcı tarafından müdahele edilemeyen gömülü parametrelerine bağlı olarak 3B sonuç ürünleri farklı özellikler ve distorsiyonlar içermektedir. Bu çalışmada, Zonguldak Bülent Ecevit Üniversitesi Çaycuma Kampüsü'nde insansız hava aracı (İHA) ile elde edilen yüksek çözünürlüklü hava fotoğraflarından VisualSFM, Agisoft ve Pix4D SFM tabanlı yeni nesil görüntü eşleme yazılımları kullanılarak eş grid aralıklı 3B dijital yüzey modelleri (DYM) üretilmiştir. Üretilen DYM'ler kapsamlı bir şekilde değerlendirilmiş ve Agisoft DYM'si referans olarak kullanılarak DYM’ler görsel ve istatistiksel yaklaşımlarla karşılaştırılmıştır. Standart sapma ve normalize medyan mutlak sapma temelinde elde edilen sonuçlar, analiz edilen SFM tabanlı yazılımların artılarını ve eksilerini açıkça ortaya koymuştur.

Keywords

SFM, VisualSFM, Agisoft, Pix4D, Dijital Yüzey Modeli

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