Results 1 to 10 of about 87,329 (117)

Estimating Endmember Backscattering Coefficients Within the Mixed Pixels Based on the Microwave Backscattering Contribution Decomposition Model [PDF]

open access: yesSensors
The complexity of land types and the limited spatial resolution of Synthetic Aperture Radar (SAR) imagery have led to widespread mixed-pixel contamination in radar backscatter images.
Yubin Song   +6 more
doaj   +2 more sources

Analyzing the Effect of the Spectral Interference of Mixed Pixels Using Hyperspectral Imagery

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
The widespread presence of mixed pixels in remotely sensed images is a pressing challenge for accurate target detection and classification. Linear spectral mixture analysis (LSMA) is commonly used to address this problem by deriving remotely sensed ...
Shanshan Feng, Fenglei Fan
doaj   +3 more sources

Prevalence of Pure Versus Mixed Snow Cover Pixels across Spatial Resolutions in Alpine Environments

open access: yesRemote Sensing, 2014
Remote sensing of snow-covered area (SCA) can be binary (indicating the presence/absence of snow cover at each pixel) or fractional (indicating the fraction of each pixel covered by snow). Fractional SCA mapping provides more information than binary SCA,
David J. Selkowitz   +2 more
doaj   +3 more sources

BIDIRECTIONAL REFLECTANCE DISTRIBUTION FUNCTION (BRDF) OF MIXED PIXELS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
Hyperspectral imaging is crucial for a variety of land-cover mapping and analyzing tasks. The available large number of reflected light measurements along a wide range of wavelengths allows for distinguishing between different materials under various ...
F. Kizel, Y. Vidro
doaj   +1 more source

LASER RANGING MODELING UNDER GENERALIZED MIXED PIXELS EFFECT [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
When a target lies on discontinuous surfaces, the footprint of a laser rangefinder covering multiple ranges causes mixed pixels effect and significantly distorts the ranging quality.
C. M. Chang, J. J. Jaw
doaj   +1 more source

Hyperspectral Images Unmixing Based on Abundance Constrained Multi-Layer KNMF

open access: yesIEEE Access, 2021
Due to the low spatial resolution of the sensors, the hyperspectral images contain mixed pixels. The purpose of hyperspectral unmixing is to decompose the mixed pixels into a series of endmembers and abundance fractions.
Jing Liu, You Zhang, Yi Liu, Caihong Mu
doaj   +1 more source

Spatial Resolution Requirements for the Application of Temperature and Emissivity Separation (TES) Algorithm Over Urban Areas

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Current thermal infrared satellite images are full of mixed pixels. This work is a quantitative analysis, based on radiative transfer modelling, of the distribution of mixed pixels and their impact on the use of temperature and emissivity separation (TES)
Zhijun Zhen   +3 more
doaj   +1 more source

Development of an Adaptive Linear Mixture Model for Decomposition of Mixed Pixels to Improve Crop Area Estimation Using Artificial Neural Network

open access: yesIEEE Access, 2023
Precise spatial information of crop distribution is vital for government and research organizations to monitor agriculture activities like crop health monitoring, crop yield prediction, and food security.
Arun Kant Dwivedi   +3 more
doaj   +1 more source

Spatial Validation of Spectral Unmixing Results: A Systematic Review

open access: yesRemote Sensing, 2023
The pixels of remote images often contain more than one distinct material (mixed pixels), and so their spectra are characterized by a mixture of spectral signals.
Rosa Maria Cavalli
doaj   +1 more source

An Elastic-Window-Based Method for the Underdetermined Problem in Linear Spectral Unmixing to Enhance the Spatial Resolution of the Normalized Difference Vegetation Index Time Series

open access: yesApplied Sciences, 2023
Inverting land cover reflectance or derived indices from low-spatial-resolution images to refine the spatial resolution of this data is cost-effective for land surface monitoring applications that face technical or budget limitations. Based on the linear
Boyu Liu, Yushuo Zhang
doaj   +1 more source

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