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Register a new userEvaluation of free photogrammetric software and its use in 3D data extraction
تقييم لبرامج المسح التصويري المجانية و استخدامها في اقتطاع بيانات ثلاثية الأبعاد
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تعتبر البيانات ثلاثية الأبعاد المقتطعة من الصور التجسيمية المدخل الأساسي في النمذجة الرقمية و إنشاء قواعد بيانات نظم المعلومات الجغرافية. يتم الحصول على هذا النوع من البيانات باستخدام برامج احترافية صعبة الاستخدام لغير المختصين. هذا, و تعتبر خطوة توجيه الصور أساسيةً في هذه المعالجة. نقترح في هذا البحث استخدام برامج المسح التصويري المجانية المتاحة على شبكة الإنترنيت لإنجاز خطوة التوجيهين الداخلي و الخارجي للصور, و لكن قبل القيام بذلك يجب تقييمها. في هذا البحث قمنا باستخدام برنامج تعليمي مجاني مطور من قبل جهة أكاديمية متخصصة في المسح التصويري. تم تطبيق البرنامج لحساب معاملات توجيه مزدوج تجسيمي من الصور الجوية لمنطقة حضرية. تم بعد ذلك تقييم النتائج من خلال مقارنتها مع النتائج التي حصلنا عليها باستخدام برنامج احترافي. تم لاحقاً القيام بمجموعة من التحليلات المجسّمة بالاستعانة بنتائج البرنامج التعليمي. هذه النتائج تم تقييمها أيضاً باستخدام برنامج احترافي.
3D data, extracted from stereoscopic images, are considered as the main input for digital modeling and GIS database construction. These data are usually collected by using professional software. This kind of tools, is difficult to use by the non-specialists. In this study, we propose to use the free academic photogrammetric softwares that are available in the internet, to achieve interior and exterior orientations of images. But, before this step, these softwares must be evaluated. In our research, we applied a software developed by an academic photogrammetric society. The software was applied to calculate the orientation parameters of a stereoscopic pair of aerial photos taken for an urban area. After that, the results were evaluated by the help of a professional photogrammetric software. Finally, a group of stereoscopic analysis was done by using the academic software. Again, the results were evaluated by the help of a professional software.
References used
GRUSSENMEYER, P., KOEHL, M., Architectural photogrammetry with the TIPHON software, towards digital documentation in the field. International archives of Photogrammetry and Remote Sensing Vol. XXXII, part 5, Hakodate, 1998, pp. 549-556
L. ZHAO, X. CHENG and Z. WU., Study on image distortion caused by camera incline in multi-format aerial digital camera. In Proceedings of the 1st International Conference on Information Science and Engineering (ICISE), 26 - 28 Dec 2009, pp. 1452 – 1455
NOVAK, K.. Rectification of digital imagery. Photogrammetric Engineering and Remote Sensing, 58, (1992), 339–344
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During the past few years, new developments have occurred in the field of 3D photogrammetric modeling of historical monuments. One of these developments is the expansion of 3D photogrammetric modeling cost-effective licensed software, such as Agisoft
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