نتایج جستجو برای: unmixing خطی
تعداد نتایج: 32929 فیلتر نتایج به سال:
Spectral unmixing is a key process in identifying spectral signature of materials and quantifying their spatial distribution over an image. The linear model is expected to provide acceptable results when two assumptions are satisfied: (1) The mixing process should occur at macroscopic level and (2) Photons must interact with single material before reaching the sensor. However, these assumptions...
Accurate evaluation of metastatic lymph nodes (LNs) is indispensable for adequate treatment of colorectal cancer (CRC) patients. Here, we demonstrate detection of metastases of human CRC in removed fresh LNs using 5-aminolevulinic acid (ALA)-induced protoporphyrin IX (PpIX) fluorescence. A spectral unmixing method was employed to reduce the overlap of collagen autofluorescence on PpIX fluoresce...
Biochar soil amendment is globally recognized as an emerging approach to mitigate CO2 emissions and increase crop yield. Because the durability and changes of biochar may affect its long term functions, it is important to quantify biochar in soil after application. In this chapter, an automatic soil biochar estimation method is proposed by analysis of hyperspectral images captured by cameras th...
This paper is concerned with deblurring and spectral analysis of ground-based astronomical images of space objects. A numerical approach is provided for deblurring and sparse unmixing of ground-based hyperspectral images (HSI) of objects taken through atmospheric turbulence. Hyperspectral imaging systems capture a 3D datacube (tensor) containing: 2D spatial information, and 1D spectral informat...
The problem of mixed pixels negatively affects the delineation of accurate surface water in Landsat Imagery. Linear spectral unmixing has been demonstrated to be a powerful technique for extracting surface materials at a sub-pixel scale. Therefore, in this paper, we propose an innovative low albedo fraction (LAF) method based on the idea of unconstrained linear spectral unmixing. The LAF stands...
The pixels of remote images often contain more than one distinct material (mixed pixels), and so their spectra are characterized by a mixture spectral signals. Since 1971, shared effort has enabled the development techniques for retrieving information from mixed pixels. most analyzed, implemented, employed procedure is unmixing. Among extensive literature on unmixing, nineteen reviews were iden...
The direct detection of exoplanets with high-contrast instruments can be boosted high spectral resolution. For integral field spectrographs yielding hyperspectral data, this means that the view consists diffracted starlight spectra and a spatially localized planet. Analysis usually relies on cross-correlation theoretical spectra. In purely blind-search context, supervised strategy biased model ...
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