An approach based on the improved quadtree structure and region adjacency graph for the segmentation of a high-resolution remote sensing image is proposed in this paper. In order to obtain the initial segmentation results of the image, the image is first iteratively split into quarter sections and the quadtree structure is constructed. In this process, an improved fast calculation method for st...

This study examines a novel extraction method for SAR imagery data of widespread flooding, particularly in the Chao Phraya river basin of central Thailand, where flooding occurs almost every year. Because the 2011 flood was among the largest events and of a long duration, a large number of satellites observed it, and imagery data are available. At that time, RADARSAT-2 data were mainly used to ...

Submetric satellite imagery (Pleiades, GeoEye) offers advantages for map update purposes, e.g. an interesting ground resolution, a good reactivity and the ability to capture wide areas. Experiments on the use of such stereoscopic images for 2D change detection among building objects of GIS topographic database are presented in this paper. Two approaches have been tested. The first one extracts ...

To improve the efficiency of agricultural lands condition and use monitoring, method for detecting fallow overgrowth with tree shrub vegetation using multi-temporal multispectral satellite images high spatial resolution is proposed. The task localization solved on basis wavelet analysis. This technique allows to operationally automatically detect areas vegetation. proposed methodology was teste...

Satellite data are very useful for the continuous monitoring of ever-changing environments, such as wetlands. In this study, we investigated use multispectral imagery to monitor winter evolution land cover in Albufera wetland (Spain), using Landsat-8 and Sentinel-2 datasets. With data, frequency observation is limited by possible presence clouds. To overcome problem, acquired two missions, Sent...

Pan-sharpening methods are commonly used to synthesize multispectral and panchromatic images. Selecting an appropriate algorithm that maintains the spectral spatial information content of input images is a challenging task. This review paper investigates wide range algorithms, including 41 methods. For this purpose, were categorized as Component Substitution (CS-based), Multi-Resolution Analysi...

We propose a novel approach using airborne image sequences for detecting dense crowds and individuals. Although airborne images of this resolution range are not enough to see each person in detail, we can still notice a change of color and intensity components of the acquired image in the location where a person exists. Therefore, we propose a local feature detection-based probabilistic framewo...

The u�e of remote �en�ed image� in many appli�ation� of environmental monitoring, �hange dete�tion, ri�k� analy�i�, damage prevention, et�. i� �ontinuou�ly growing. Classification of remote sensed images, exploited for the production of land cover maps, involves continuous efforts in the refinement of the employed methodologies. The pixelwise approach, which considers the spectral information a...

The Pleiades mission is part of the French-Italian ORFEO system (Optical and Radar Federated Earth Observation) and has the aim to provide very-high resolution optical imagery from space for civilian and military needs. Within the Pleiades evaluation program, the 3DOM Unit at the Bruno Kessler Foundation in Trento (Italy) received a triplet by Pleiades-1A over Trento testfield for research purp...

In this paper, grid cell based spatial statistics were used to quantify the drivers of land-cover and land-use change (LCLUC) and habitat degradation in a tropical rainforest in Madagascar. First, a spectral database of various land-cover and land-use information was compiled using multi-year field campaign data and photointerpretation of satellite images. Next, residential areas were extracted...