| Records |
| Author |
Franke, S.; Brüning, A.; Hölker, F.; Kloas, W. |
| Title |
Study of biological action of light on fish |
Type |
Journal Article |
| Year |
2013 |
Publication |
Journal of Light & Visual Environment |
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| Volume |
37 |
Issue |
4 |
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no |
| Call Number |
LoNNe @ kagoburian @ |
Serial |
698 |
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| Author |
Lyytimäki, J. |
| Title |
Avoiding overly bright future: The systems intelligence perspective on the management of light pollution |
Type |
Journal Article |
| Year |
2015 |
Publication |
Environmental Development |
Abbreviated Journal |
Environmental Development |
| Volume |
16 |
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Pages |
4-14 |
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2211-4645 |
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no |
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LoNNe @ christopher.kyba @ |
Serial |
1200 |
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| Author |
Lammerts, W.E. |
| Title |
The effect of continuous light, high nutrient level and temperature on flowering of camellia hybrids |
Type |
Journal Article |
| Year |
1949 |
Publication |
American Camellia Yearbook |
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Pages |
53-56 |
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no |
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GFZ @ kyba @ |
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2466 |
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| Author |
Zheng, Q.; Weng, Q.; Wang, K. |
| Title |
Correcting the Pixel Blooming Effect (PiBE) of DMSP-OLS nighttime light imagery |
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Journal Article |
| Year |
2020 |
Publication |
Remote Sensing of Environment |
Abbreviated Journal |
Remote Sensing of Environment |
| Volume |
240 |
Issue |
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Pages |
111707 |
| Keywords |
*instrumentation; Remote Sensing |
| Abstract |
In the last two decades, the advance in nighttime light (NTL) remote sensing has fueled a surge in extensive research towards mapping human footprints. Nevertheless, the full potential of NTL data is largely constrained by the blooming effect. In this study, we propose a new concept, the Pixel Blooming Effect (PiBE), to delineate the mutual influence of lights from a pixel and its neighbors, and an integrated framework to eliminate the PiBE in radiance calibrated DMSP-OLS datasets (DMSPgrc). First, lights from isolated gas flaring sources and a Gaussian model were used to model how the PiBE functions on each pixel through point spread function (PSF). Second, a two-stage deblurring approach (TSDA) was developed to deconvolve DMSPgrc images with Tikhonov regularization to correct the PiBE and reconstruct PiBE-free images. Third, the proposed framework was assessed by synthetic data and VIIRS imagery and by testing the resulting image with two applications. We found that high impervious surface fraction pixels (ISF > 0.6) were impacted by the highest absolute magnitude of PiBE, whereas NTL pattern of low ISF pixels (ISF < 0.2) was more sensitive to the PiBE. By using TSDA the PiBE in DMSPgrc images was effectively corrected which enhanced data variation and suppressed pseudo lights from non-built-up pixels in urban areas. The reconstructed image had the highest similarity to reference data from synthetic image (SSIM = 0.759) and VIIRS image (r = 0.79). TSDA showed an acceptable performance for linear objects (width > 1.5 km) and circular objects (radius > 0.5 km), and for NTL data with different noise levels (<0.6σ). In summary, the proposed framework offers a new opportunity to improve the quality of DMSP-OLS images and subsequently will be conducive to NTL-based applications, such as mapping urban extent, estimating socioeconomic variables, and exploring eco-impact of artificial lights. |
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0034-4257 |
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no |
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GFZ @ kyba @ |
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2940 |
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| Author |
Bará, S. |
| Title |
Light pollution and solid-state lighting: reducing the carbon dioxide footprint is not enough |
Type |
Journal Article |
| Year |
2014 |
Publication |
Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 87852G, 2013 |
Abbreviated Journal |
Proc. SPIE 8785 |
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8785 |
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| Keywords |
*Lighting; LED; light emitting diode; outdoor lighting; artificial light at night; lighting policy; solid-state lighting; blue light |
| Abstract |
Public and private lighting account for a relevant share of the overall electric power consumption worldwide. The pressing need of reducing the carbon dioxide emissions as well as of lowering the lumen•hour price tag has fostered the search for alternative lighting technologies to substitute for the incandescent and gas-discharge based lamps. The most successful approach to date, solid-state lighting, is already finding its way into the public lighting market, very often helped by substantial public investments and support. LED-based sources have distinct advantages: under controlled conditions their efficacy equals or surpasses that of conventional solutions, their small source size allows for an efficient collimation of the lightbeam (delivering the photons where they are actually needed and reducing lightspill on the surrounding areas), and they can be switched and/or dimmed on demand at very high rates, thus allowing for a tailored schedule of lighting. However, energy savings and carbon dioxide reduction are not the only crucial issues faced by present day lighting. A growing body of research has shown the significance of the spectral composition of light when it comes to assess the detrimental effects of artificial light-at-night (ALAN). The potential ALAN blueshift associated to the deployment of LED-based lighting systems has raised sensible concerns about its scientific, cultural, ecological and public health consequences, which can be further amplified if an increased light consumption is produced due to the rebound effect. This contribution addresses some of the challenges that these issues pose to the Optics and Photonics community. |
| Address |
Univ. de Santiago de Compostela, Spain; salva.bara@usc.es |
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SPIE |
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| Language |
English |
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English |
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no |
| Call Number |
IDA @ john @ |
Serial |
1135 |
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