نتایج جستجو برای: spot5

تعداد نتایج: 136  

  سگمنت­سازی یکی از روش­های اصلی استخراج اطلاعات در پردازش شیءگرای تصاویر ماهواره­ای است. فرآیند سگمنت­سازی، پدیده­های اولیه و اصلی در یک تصویر را تفکیک می­نماید که مبنایی برای طبقه­بندی شیءگرا می­باشد. با توجه به اینکه دقت طبقه­بندی شیءگرا تا حد زیادی وابسته به دقت سگمنت­سازی است، بنابراین تولید سگمنت­های مناسب نقش مهمی در دست­یابی به دقت بالا در فرآیند طبقه­بندی شیءگرا دارد. در این پژوهش...

2010
James Hollingsworth Sébastien Leprince François Ayoub Jean-Philippe Avouac

Recent development of the user-friendly software package “Co-registration of Optically Sensed Images and Correlation” (COSI-Corr), which allows for automatic and precise ortho-rectification, co-registration, and sub-pixel correlation of pushbroom satellite and aerial images, has enabled Earth’s surface dynamics to be accurately monitored using optical imagery [1]. This technique compares two im...

2008
J. A. Malpica M. C. Alonso

The use of new, high-resolution spectral sensors, in contrast with low-resolution, increases both the amount of information acquired about land cover at local scales, and the geometric detail and accuracy. However, the algorithms needed for high-resolution image processing are more complex than those needed for their low-resolution counterparts. This paper's main objective is to present a new m...

2015
Cencen Niu Qing Wang Jianping Chen Wen Zhang Liming Xu Vincenzo Torretta

The outbreak of debris flows in a reservoir region can affect the stability of hydropower stations and threaten the lives of the people living downstream of dams. Therefore, determining the hazard degree of debris flows in a reservoir region is of great importance. SPOT5 remote sensing images and digital elevation models are introduced to determine the characteristics of debris-flow catchments....

2008
Liping Zhao Fengde Liu Wei Wang Jian Li

In this paper, the development of Indian Remote Sensing Satellite Serials is reviewed, the specifications of CARTOSAT-1 satellite platform and Sensor is introduced and compared with IKONOS、SPOT5 HRS. The positioning algorithm using Rational Function Model (RFM Model) of CARTOSAT-1 is described in detail. Experimentation is carried out using stereo pair of Beijing hilly area. The results show th...

2005
R. ALONSO REYES

The offer of high spectral and high spatial resolutions images has grown in the last decade. It is know possible to obtain data from different sources with different spatial and spectral resolutions. The field of data fusion of remotely sensed data grown also very fast in the last years. In this paper, an algorithm allowing the merging of SPOT 5 images and Ikonos images are proposed. This algor...

2004
Leong Keong KWOH Xiaojing HUANG

An automatic process for relative registering and merging the panchromatic and multispectral images of SPOT5 is presented. The automated hierarchical local registration process makes use of feature information to select tie points from both images. The tie points are then used to refine the sensor model of the multispectral image by method of least squares solution. Both panchromatic and multis...

2004
A. Bouillon P. Gigord Edouard Belin

HRS instrument on board of SPOT5 allows acquisition of stereoscopic pairs in a single pass. This instrument has been subject of specific attention even after the end of SPOT5 in flight commissioning phase. The stake was not only to fulfil HRS' location specification of 50 meters in root mean square but to obtain a location performance as best as possible and at least about 25 meters in root mea...

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