With the advancement of remote sensing sensor technologies, images of the earth’s surface have been collected at different spatial resolutions, in different spectral wavelengths (panchromatic, multispectral, hyperspectral), and with mono or stereoscopic views. The advancement of the technologies for geospatial information acquisition and extraction has allowed the generation of digital elevatio...

1.1 Context With the development of new satellite systems and the accessibility of data from public through web services like Google Earth, remote sensing imagery, knows today an important growing which advanced and still advances researches in this area on different aspects. Especially in cartography, many studies have been conducted for multi-source satellite images classification. These stud...

Reducing noise from the medical images, a satellite image etc. is a challenge for the researchers in digital image processing. Several approaches are there for noise reduction. Generally speckle noise is commonly found in synthetic aperture radar images, satellite images and medical images. This paper proposes filtering techniques for the removal of speckle noise from the digital images. Quanti...

DEFINITION Georegistration is the alignment of an unreferenced image with a geodetically (latitude, longitude, and elevation based) calibrated reference image [1]. In general, this process aligns two images (satellite is the most common, but is not limited to satellite images) and correlating the images to a physical location by examining a set of distinguishable points. Figure 1 shows an examp...

land cover mapping is important for many planning and management activities. today, satellite images and remote sensing techniques are extensively used in all sectors including agriculture and natural resources because they provide updated data and high analyzing abilities. in this study, in order to produce land cover map for the northern part of hamedan province , digital satellite data irsp6...

Photographs are not just keepsakes. Images from outer space help us keep track of planet Earth and its resources. Satellites equipped with special sensors (like eyes) that can see “colors” light human eyes cannot see. These satellites orbit really high above us, travel around frequently. This birds-eye view speedy revisit time means they inform about natural disasters, climate change, the weath...