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Journals / Harita Dergisi / 2018 / Cilt: 84 - Sayı: 159

Precision Analysis of The Stereo Image Orientation

Stereo Görüntü Yöneltmesinde Duyarlılık Analizi

Ali Coşkun KİRACI
Gönül TOZ
Pages
36–43
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Effect of each orientation parameter to positional sensitivity is examined and interpreted by implementing error propagation.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:GPS/IMU system can provide orientation parameters directly by measurements performed during the flight.
📊
Key Findings & Data:In this context positional sensitivity is determined on 10 cm GSD (Ground Sample Distance) stereo images by computational practice without GCP and tested the validity of performed sensitivity analysis by comparing wtih the results obtained by adjustment.
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Conclusion & Impact:Effect of each orientation parameter to positional sensitivity is examined and interpreted by implementing error propagation.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

GPS/IMU system can provide orientation parameters directly by measurements performed during the flight. However especially if direct georeferencing is performed, knowledge of the positional accuracy would be important. Positional sensitivity is determined generally by using GCP (Ground Control Point) in photogrammetric projects. But GCP construction is cost and it is not possible to find in enough number anytime. Thus situated it is possible to compute positional sensitivity by error propagation. In this study, photogrammetric mathematical model is viewed, positional sensitivity is computed by implementing error propagation on collinearity equations. In this context positional sensitivity is determined on 10 cm GSD (Ground Sample Distance) stereo images by computational practice without GCP and tested the validity of performed sensitivity analysis by comparing wtih the results obtained by adjustment. Effect of each orientation parameter to positional sensitivity is examined and interpreted by implementing error propagation.

Özet

GPS/IMU (Global Positioning System/Inertial Measurement Unit) sistemi, uçuş sırasında gerçekleştirilen ölçümler ile dış yöneltme elemanlarını doğrudan sağlayabilmektedir. Ancak özellikle doğrudan yöneltme yapılacaksa konum doğruluğunun bilinmesi önem tanışmaktadır. Fotogrametrik projelerde konum duyarlılığı genelde ampirik olarak YKN (Yer Kontrol Noktası) kullanılarak belirlenmektedir. Ancak YKN inşaası maliyetlidir ve her proje için yeterli sayıda bulunması her zaman mümkün olmamaktadır. Bu durumda konum duyarlılığını hata yayılma yasası ile hesaplamak mümkündür. Bu çalışmada fotogrametrik matematik modeli incelenmiş, izdüşüm denklemlerine hata yayılma yasası uygulanarak konum duyarlılığı hesaplanmıştır. Bunun yanında her bir yöneltme parametresinin konum duyarlılığına etkisi incelenmiş ve yorumlanmıştır. Bu kapsamda 10 cm YÖA (Yer Örnekleme Aralığı)’na sahip stereo görüntüler üzerinde hesapsal bir uygulama ile YKN olmadan konum hassasiyeti belirlenmiş ve dengeleme sonuçlarından elde edilen sonuçlar ile karşılaştırılarak yapılan duyarlılık analizinin kullanılabilirliği test edilmiştir.

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Cite This Article

KİRACI, A. C., TOZ, G. (2018). Precision Analysis of The Stereo Image Orientation. Harita Dergisi, Cilt: 84 - Sayı: 159, 36–43. https://ajindex.com/articles/160128

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