Searched for: subject%3A%22night%255C%2Bvision%22
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Hogervorst, M.A. (author), Toet, A. (author)
Previously, we presented two color mapping methods for the application of daytime colors to fused nighttime (e.g., intensified and longwave infrared or thermal (LWIR)) imagery. These mappings not only impart a natural daylight color appearance to multiband nighttime images but also enhance their contrast and the visibility of otherwise obscured...
article 2017
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Toet, A. (author)
Despite of the ongoing interest in the fusion of multi-band images for surveillance applications and a steady stream of publications in this area, there is only a very small number of static registered multi-band test images (and a total lack of dynamic image sequences) publicly available for the development and evaluation of image fusion...
article 2017
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Hogervorst, M.A. (author), Toet, A. (author)
Previously, we presented a method for applying daytime colours to fused nighttime (e.g., intensified and LWIR) imagery (Toet and Hogervorst, Opt.Eng. 51(1), 2012). Our colour mapping not only imparts a natural daylight appearance to multiband nighttime images but also enhances the contrast and visibility of otherwise obscured details. As a...
conference paper 2016
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Toet, A. (author), Hogervorst, M.A. (author)
We introduce a multiscale image fusion scheme based on guided filtering. Guided filtering can effectively reduce noise while preserving detail boundaries. When applied in an iterative mode, guided filtering selectively eliminates small scale details while restoring larger scale edges. The proposed multi-scale image fusion scheme achieves optimal...
conference paper 2016
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Laurent, N. (author), Bijl, P. (author), Deltel, G. (author)
Night vision equipment is crucial in order to accomplish supremacy and safety of the troops on the battlefield. Evidently, system integrators, ministry of defenses and end-users need access to reliable quantitative characterization of the expected field performance when using night vision equipment. The image intensifier tube is one of the most...
article 2015
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Hogervorst, M.A. (author), Kooi, F.L. (author)
Current night-time training using (flight-, driving-) simulators is hindered by the lack of realism. Effective night-time training requires the simulation of the illusions and limitations experienced while wearing Night Vision Goggles during the night. Various methods exist that capture certain sensor effects such as noise and the characteristic...
conference paper 2014
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Toet, A. (author), de Jong, M.J. (author), Hogervorst, M.A. (author), Hooge, I.T.C. (author)
Color remapping can give multispectral imagery a realistic appearance. We assessed the practical value of this technique in two observer experiments using monochrome intensified (II) and long-wave infrared (IR) imagery, and color daylight (REF) and fused multispectral (CF) imagery. First, we investigated the amount of detail observers perceive...
article 2014
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Toet, A. (author), de Jong, M.J. (author), Hogervorst, M.A. (author), Hooge, I.T.C. (author)
We recently presented a color transform that produces fused nighttime imagery with a realistic color appearance (Hogervorst & Toet, 2010, Information Fusion, 11-2, 69-77). To assess the practical value of this transform we performed two experiments in which we compared human scene recognition for monochrome intensified (II) and longwave infrared...
conference paper 2014
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Laurent, N. (author), Lejard, C. (author), Deltel, G. (author), Bijl, P. (author)
Night vision equipment is crucial in order to accomplish supremacy and safety of the troops on the battlefield. Evidently, system integrators, MODs and end-users need access to reliable quantitative characterization of the expected field performance when using night vision equipment. The Image Intensifier tube is one of the most important...
conference paper 2013
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Toet, A. (author), Hogervorst, M.A. (author)
We present an overview of our recent progress and the current state-of-the-art techniques of color image fusion for night vision applications. Inspired by previously developed color opponent fusing schemes, we initially developed a simple pixel-based false color-mapping scheme that yielded fused false color images with large color contrast and...
article 2012
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Hogervorst, M.A. (author), Jansen, C. (author), Toet, A. (author), Bijl, P. (author), Bakker, P.J. (author), Hiddema, A.C. (author), van Vliet, S.F. (author)
We present the design and evaluation of a new demonstrator rifle sight viewing system containing direct view, red aim point and fusion of an (uncooled, LWIR) thermal sensor with a digital image intensifier. Our goal is to create a system that performs well under a wide variety of (weather) conditions during daytime and nighttime and combines the...
conference paper 2012
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Toet, A. (author), Hogervorst, M.A. (author), van Son, R. (author), Dijk, J. (author)
We present the design and first field trial results of an all-day all-weather enhanced and synthetic-fused multi-band colour night vision surveillance and observation system. The system augments a fused and dynamic three-band natural-colour night vision image with synthetic 3D imagery in real-time. The night vision sensor suite consists of three...
article 2011
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TNO Defensie en Veiligheid (author), Toet, A. (author), Hogervorst, M.A. (author), Dijk, J. (author), van Son, R. (author)
We present the design and first field trial results of the all-day all-weather INVIS Integrated Night Vision surveillance and observation System. The INVIS augments a dynamic three-band false-color nightvision image with synthetic 3D imagery in a real-time display. The night vision sensor suite consists of three cameras, respectively sensitive...
conference paper 2010
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TNO Defensie en Veiligheid (author), Dijk, J. (author), Schutte, K. (author), Toet, A. (author), Hogervorst, M.A. (author)
We present the design and first field trial results of the INVIS integrated night vision surveillance and observation system, in particular for the image enhancement techniques implemented. The INVIS is an all-day-andnight all-weather navigation and surveillance tool, combining three-band cameras. We present a processing pipeline for this system...
conference paper 2010
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TNO Defensie en Veiligheid (author), Toet, A. (author), Hogervorst, M.A. (author)
We present the design and first test results of the TRICLOBS (TRI-band Color Low-light OBServation) system The TRICLOBS is an all-day all-weather surveillance and navigation tool. Its sensor suite consists of two digital image intensifiers (Photonis ICU's) and an uncooled longwave infrared microbolometer (XenICS Gobi 384). The night vision...
conference paper 2009
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TNO Defensie en Veiligheid (author), Hogervorst, M.A. (author), Toet, A. (author)
We designed and evaluated a dual-band Night Vision Goggles sensor system. The sensor system consists of two optically aligned NVGs fitted with filters splitting the sensitive range into a visual and a near-infrared band. The Color-the-night technique (Hogervorst & Toet, FUSION2008) was used to fuse the images of the two sensors, using a color...
conference paper 2009
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TNO Defensie en Veiligheid (author), Dijk, J. (author), Bijl, P. (author), Bouma, H. (author)
Recently new techniques for night-vision cameras are developed. Digital image-intensifiers are becoming available on the market. Also, so-called EMCCD cameras are developed, which may even be able to record color information about the scene. However, in low-light situations all night-vision imagery becomes noisy. In this paper we evaluate the...
conference paper 2009
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TNO Defensie en Veiligheid (author), Toet, A. (author), Hogervorst, M.A. (author)
We present a new Tri-band Color Low-light Observation (TRICLOBS) system The TRICLOBS is anall-day all-weather surveillance and navigation tool. Its sensor suite consists of two digital image intensifiers and an uncooled longwave infrared microbolometer. This sensor suite registers the visual, near-infrared and longwave infrared bands of the...
conference paper 2009
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Toet, A. (author), Jansen, S.E.M. (author), Delleman, N.J. (author), TNO Defensie en Veiligheid (author), Nato (author)
Field-of-view (FOV) restrictions are known to affect human behaviour and to degrade performance for a range of different tasks. However, the relationship between human locomotion performance in complex environments and FOV size is currently not fully known. This paper examined the effects of FOV restrictions on the performance of participants...
article 2008
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TNO Defensie en Veiligheid (author), Dijk, J. (author), den Hollander, R.J.M. (author)
Recently new techniques for night vision cameras are developed. So-called EMCCD cameras are able to record color information about the scene. However, in low-light situations this imagery becomes noisy. This is also the case for normal CCD cameras in dark situations or in shadowed areas. In this paper we present image enhancement techniques for...
conference paper 2008
Searched for: subject%3A%22night%255C%2Bvision%22
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