نتایج جستجو برای: ikonos
تعداد نتایج: 845 فیلتر نتایج به سال:
High and accelerating rate of the urban changes and extensions, in developing countries such as Egypt, calls for an efficient and fast technique for mapping. The availability of the new generation commercial one-meter resolution satellite images has opened a new era for producing and updating large-scale digital maps. The main objective of this study is to evaluate the potential of VHR satellit...
The number of high resolution space imageries, in the civilian market is growing fast.This images have great interest in the photogrammetric and remote sensing communities. The problem with this images for many users, at the present time is the lack of sensor calibration information and precise ephemeris data. Consequently it is not possible to apply the precise mathematical models such as orbi...
The focus of this study is to thoroughly exploit the capability of very high-resolution (VHR) satellite imagery such as IKONOS and QuickBird for disaster mitigation. An efficient automated methodology that detects damage is implemented to derive the rich information available from VHR satellite imagery. Consequently, the detected results and the VHR satellite imagery are attractively presented ...
The objective of this study was to determine relationship between high resolution satellite image and wheat N status, and develop a methodology to predict wheat N status in the farmers’ fields. Field experiment with 5 different N rates was conducted in Huimin County in the North China Plain, and farmers’ fields in 3 separated sites were selected as validation plots. The IKONOS image covering al...
Experimental Study on Ground Point Determination from High Resolution Airborne and Satellite Imagery
In this paper we introduced the principle of stereo imaging using linear arrays and its implementation in several imaging systems. A simulation study was conducted in which simulated IKONOS-I fore-, nadirand aft-looking images were produced using airborne AIMS images, IKONOS-I technical data, and a DEM. The attainable accuracy of ground points determined by the imagery is reported, considering ...
High resolution IKONOS stereo imagery provides an important data source for threedimensional scene extraction. In urban areas, it has been long a challenge topic to automatically extract urban objects from images due to the high object density and scene complexity. In this paper, we propose a new method for automatic 3d building reconstruction from IKONOS stereo images. Our approach is based on...
The launch of Ikonos satellite at the end of September 1999 marked the beginning of a new era for the application of satellite images. Being able to provide up to one-metre resolution panchromatic and four-metre resolution multispectral images, thus available in the past for military purposes or from aerial surveys only, this satellite offers considerable improvements and broadens the applicati...
هم مرجع سازی تصویر یک فرآیند اساسی در پردازش تصویر بوده و هدف از آن، تعیین دقیقترین مطابقت میان دو یا چند تصویر از یک منظرهی یکسان است. مدلهای تبدیل دو بعدی نقش اساسی در هم مرجع سازی تصاویر ایفا میکنند. در این تحقیق قابلیت انواع مختلف از مدلهای تبدیل دو بعدی شامل 9 تبدیل متشابه، پروژکتیو، چندجملهای از درجات 1 تا 4، مدل تبدیل قطعهای خطی، Multiquaderic (MQ) و Pointwise (PW) در هم مرجع...
Shorelines are critical information in a Coastal Geographic Information System (CGIS). Shorelines have a dynamic nature. Hence, their definition, mapping, and subsequent utilization are a more complicated issue than people usually think. Different approaches to shoreline mapping are described and analyzed in this paper. In particular, a new method is presented in which tide-coordinated shorelin...
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