Results 271 to 280 of about 578,235 (310)

Visible ghost imaging with nonvisible light

Journal of the Optical Society of America A, 2014
In this paper, we present a new scheme of thermal ghost imaging: visible ghost imaging with nonvisible light, which can overcome the disadvantages of conventional thermal imaging. For the two light beams of the thermal ghost imaging, we use the nonvisible light (i.e., infrared light) as the object beam and the visible light as the reference beam.
Deyang, Duan, Lu, Zhang, Yunjie, Xia
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Conversion of Infrared Images to Visible in Color

Applied Optics, 1968
An ir line scan instrument has been developed that scans a scene simultaneously with three separate spectral regions and produces an image of the scene as a color photograph. The three spectral regions are 0.5-1.0 micro, 3.0-5.5 micro and 8.0-14.0 micro. The ir detectors used are Si, InSb, and Ge:Hg, respectively.
L W, Nichols, J, Lamar
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The Visibility and Image of Handicapped People on Television

Exceptional Children, 1981
A random sample of prime time television programing during spring 1979 was analyzed to determine the visibility and image of characters portrayed as handicapped. Results suggested that handicapped persons are, overall, not highly visible and are as likely to appear in negative roles as positive ones.
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No Reference Assessment of Image Visibility for Dehazing

2017
Haze affects the quality and visibility of the image. Many dehazing algorithms have been developed in recent years. However, the evaluation for the performance of the dehazing method is still not solved. The assessment is not easy to achieve since the reference image is not available.
Manjun Qin, Fengying Xie, Zhiguo Jiang 0001   +2 more
openaire   +1 more source

Image verbale, image visible

2013
info:eu-repo/semantics ...
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Visible Light Imaging

2014
The visible light is that region of the electromagnetic spectrum that is detectable by the human eye, whose wavelength ranges from 400 to 700 nm.
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Learning Based Visibility Measuring with Images

2011
Visibility is one of the major items of meteorological observation. Its accuracy is very important to air, sea and highways and transport. A method of visibility calculation based on image analysis and learning is introduced in this paper. First, visibility image is effectively represented by contrast based vision features.
Xu-Cheng Yin, Tiantian He, Hong-Wei Hao, Xi Xu, Xiao-Zhong Cao, Qing Li 0015   +5 more
openaire   +1 more source

Estimation of visibility using a visual image

Environmental Monitoring and Assessment, 2015
Optical-based visibility measurement instruments have been widely used to quantify atmospheric light extinction for decades. The light extinction coefficient is converted to visual range using a well-known formula since visibility is defined as the longest distance at which a black object can be observed against the horizon.
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Visibility Estimation Using a Single Image

2017
In this paper, we propose a novel method for visibility estimation using only a single image as input. An assumption is proposed: the extinction coefficient of light is approximately a constant in clear atmosphere. Using this assumption with the theory of atmospheric radiation, the extinction coefficient in clear atmosphere can be estimated.
Qin Li 0010, Bin Xie
openaire   +1 more source

The Visibility of Evictions (an Image of Health)

American Journal of Public Health, 2023
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