نتایج جستجو برای: quac
تعداد نتایج: 27 فیلتر نتایج به سال:
Compared to nadir viewing, off-nadir viewing of the ground from a high-altitude platform provides opportunities to increase area coverage and to reduce revisit times, although at the expense of spatial resolution. In this study, the ability to atmospherically compensate off-nadir hyperspectral imagery taken from a space platform was evaluated for a worstcase viewing geometry, using EO-1 Hyperio...
Fundamental image processing methods, such as atmospheric corrections and pansharpening, influence the signal of pixel. This morphs spectral signature target features causing a change in both final spectra way different mapping methods may assign thematic classes. In current study, we aim to identify variations induced by popular reflectance maps facies. To this end, have tested three correctio...
Atmospheric correction is the processes of converting radiance values measured at a spectral sensor to reflectance materials in multispectral or hyperspectral image. This an important step for detecting identifying present pixel spectra. We two machine learning models atmospheric trained and tested on 100,000 batches 40 spectra converted using MODTRAN, so model learns radiative transfer physics...
Sentinel-2 and Landsat 8 satellites constitute an unprecedented source of freely accessible satellite imagery. To produce precise outputs from the data, however, proper use atmospheric correction methods is crucial. In this work, we tested performance six different (QUAC, FLAASH, DOS, ACOLITE, 6S, Sen2Cor), together with given by providers, non-corrected image, images acquired using unmanned ae...
Malnutrition is a problem at varying proportions in developing countries, and anthropometry is a simple tool to assess its magnitude in children. This study was aimed at identifying the prevalence of malnutrition among 256 children of rural areas of Karnataka in South India, who attended the aanganwadis. The value of using various field-based formulae and of various anthropometric indicators us...
Atmospheric correction algorithms allow the reduction of atmospheric components influence in the acquisition of earth’s surface reflectance properties. Quantifying this reduction is critical for the remote sensing science. Different regions have different natural or man-made composition and respond differently for each algorithm. Highly turbid inland waters are significantly sensitive to atmosp...
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