Towards next-generation map making

Chen, Xin; Stroila, Matei; Lynch, James; Alwar, Narayanan; Kohlmeyer, Brad; Hui, Roger K. W.

doi:10.1109/icme.2009.5202843

Cited by 1 publication

(1 citation statement)

References 4 publications

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“…This is achieved by controlling the redistribution of pixel intensities using the slope of the Cumulative Distribution Function (CDF) of the pixel intensity at that level. The CLAHE is widely used in image processing applications (Reza, 2004;Chen et al, 2009;Yuan and Sun, 2012;Łoza et al, 2013). The application of 30 CLAHE on a typical SEM image is shown in Fig.…”

Section: Contrast Enhancementmentioning

confidence: 99%

Morphology, Chemical Composition and Mixing State of Atmospheric Aerosols from Two Contrasting Environments in Southern India

Hariram

Govardhan

Manoj

et al. 2018

Preprint

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Abstract. The state of mixing of aerosols significantly influence their transformation, deposition, radiative forcing and health effects. We report the realistic (as in the atmosphere) state of mixing and morphology of aerosols at two nearby but contrasting environments; the urban region Bengaluru and a remote region Challakere. Ambient aerosols are collected on filter substrates using a High-Volume Sampler and analysed using Scanning Electron Microscope 15 (SEM) equipped with Energy Dispersive X-Ray spectroscopy (EDX). The results show that the prevailing state of mixing of aerosols is 'core-shell' with SiO2 as the core and Carbon-SiO2-others (Calcium-Magnesium-Aluminium and other dust origin elements) combinations as the shell. On an average, for Bengaluru (Challakere), 66% (51%) of the core surface is coated. The sample-wise mean Carbon content of the composite particles reaches as high as ~26% (~9%) at Bengaluru (Challakere). The ambient black carbon (BC) mass concentration and the amount of rainfall that 20 occurs just prior to the end of sampling are found to significantly influence the Carbon content of the particles. To the best of our knowledge, this is a first-of-its kind study over Indian region, coupling realistic aerosol observations and spectroscopy along with advanced image processing techniques to investigate the state of mixing and morphology of atmospheric aerosols at single particle resolution. This knowledge regarding the real-life state of mixing of aerosols would be useful in constraining the models studying aerosol-radiation interactions. 25 1 Introduction:

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Section: Contrast Enhancementmentioning

confidence: 99%