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Register a new userThe effect of positional precision of control points on the quality of geometric correction of high spatial resolution satellite images
تأثير الدقة المكانية لنقاط الضبط على نوعية التصحيح الهندسي للمرئيات الفضائية ذات الدقة المكانية العالية
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Tishreen University ورقة بحثية
Publication date
2018
fields
topography
and research's language is
العربية
Authors
أحمد سلمان علي( باحث )
Created by
Shamra Editor
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تهدف هذه الدراسة إلى تحليل تأثير الدقة المكانية لنقاط الضبط على الدقة الهندسية لتصحيح المرئيات، حيث تم إجراء اختبارات على نفس المرئية (IKONOS) و ذلك بتطبيق تحويلات كثيرة الحدود باستخدام مجموعات من نقاط الضبط لكل منها دقة مطلقة مختلفة عن الأخرى. تم استقراء هذه المجموعات من مخطط طبوغرافي مقياسه 1/1000 و من مرئية فضائية من النوع MOMS مرجعة دقة تمييزها المكانية 2m كما تم تحديد إحداثياتها من خلال رفع باستخدام مستقبل GPS. و قد بيّنت نتائج الدراسة أنه يمكن الحصول على أدق تصحيح هندسي باستخدام نقاط ضبط دقتها المكانية من فئة دقة التمييز المكانية للمرئية. كما بيّنت أن استخدام نقاط ضبط أكثر دقة لن يكون ذا فائدة في رفع الدقة الهندسية لتصحيح المرئية و ذلك لأن قياس هذه النقاط على المرئية سيواجه مشكلة وضوحها على المرئية و هي مسألة ترتبط بدقة تمييز هذه المرئية.
This study aims is to analyze the effect of spatial accuracy of the control points on the images geometric correction accuracy, and this is done by applying tests on the same image (IKONOS), where polynomial transformations were applied using sets of control points, each with absolute accuracy different from the other. These points were extrapolated from a 1/1000 topographic map and from a georeferenced MOMS satellite image with geometric accuracy of 2m and measured by GPS. The study showed that it is possible to obtain the most accurate geometric correction by using control points with absolute accuracy close to the spatial resolution of the image. It also showed that the use of more precise control points would not ameliorate the accuracy of the geometric correction, because the measurement of these points on the image is limited by its spatial resolution.
References used
RIDLEY، H.، ATKINSON، P.، ALPIN، P.، MULLER، J-P and DOWMAN، I. 1997. Evaluating the potential of the forthcoming commercial U.S high-resolution satellite sensor imagery at the ordnance survey(r). Photogrammetry & Remote Sensing. Vol63، n8، p.997- 1005. 1997
RONGXING، L. 1998. Potential of high-resolution satellite sensor imagery for national mapping products. Photogrammetric Engineering and Remote Sensing. Vol64، n12، p.1165-1169. 1998
D. T. PAI.، 2010. Auto rectification for robotic helicopter aerial imaging. Thesis Master of Sci-ence in Computer Science، San Diego State University، 2010
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