Photogrammetric features for the registration of terrestrial laser scans with minimum overlap

Abstract

The interest and demand for 3 Dimensional 3D documentation of man-made structures have increased with the continuous improvement in data acquisition systems and the expanding range of potential applications. Currently, 3D data can be obtained through two technologies: photogrammetry and laser scanning. In spite of the proven quality of static laser scanning, the collection and processing of laser scans is a time consuming process and the derivation of complete 3D models requires multiple scans with each scan having its own coordinate system. Therefore, the different scans should be aligned in a common coordinate system. This alignment process is known as “registration”. Current registration techniques require large overlap area between the collected scans in order to obtain reliable estimation of the transformation parameters relating these scans. The main objective of this research is to avoid the requirement of large overlap areas among the laser scans using photogrammetric data for the registration process. Registration methods generally use points as primitives to relate the different laser scans. In this research, photogrammetric linear and planar features are used for the proposed registration method. Finally, qualitative and quantitative quality control measures are proposed for analyzing the result of the proposed registration method

Keywords

• Terrestrial laser scanning,Close range photogrammetry,Registration,Feature extraction

Minimum çakışan yersel lazer taramalarının birleştirmesi için fotogrametrik özellikler

Abstract

Günümüzde, insan yapımı binaların 3 Boyutlu 3B modellemesine olan ilgi ve talep veri toplama sistemlerindeki gelişmeler ve büyüyen potansiyel uygulama aralığı ile birlikte arttı. Mevcut durumda, 3B veriler iki teknoloji ile sağlanmaktadır: fotogrametri ve lazer taraması. Lazer taramalarının toplanması ve islenmesinde zaman kaybı söz konusudur. Bütün bir 3B model elde etmek için birçok lazer taraması gerekmektedir. Her bir lazer taraması ayrı koordinat sistemlerinde olduğu için; 3B modeller ancak bu farklı koordinatlardaki lazer tamamlarının bir araya dizilmesi ile mümkündür. Bu dizilim “birleştirme” olarak bilinir. Birçok birleştirme teknikleri doğru 3B model için toplanan lazer taramaları arasında büyük oranda çakışma ister. Bu araştırmanın temel amacı fotogrametrik veri kullanarak lazer taramaları arasındaki büyük oranda istenilen çakışmadan kaçınmaktır. Birleştirme tekniklerinde genellikle noktalar kullanarak lazer taramaları arasındaki ilişki bulunur. Bu önerilen araştırmada düzlemsel ve doğrusal özellikler çıkarılmış ve kullanılmıştır. Son olarak, nitel ve nicel kalite kontrol yöntemleri önerilen birleştirme metodu sonucunu analiz etmek için yapılmıştır.

Keywords

• Yersel lazer tarayıcı,Yersel fotogrametri,Birleştirme,Özellik çıkarma

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