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Lucassen, M.P. (author), Alferdinck, J.W.A.M. (author), TNO Defensie en Veiligheid (author)We report on a dynamic simulation of defective color vision. Using an RGB video camera connected to a PC or laptop, the captured and displayed RGB colors are translated by our software into modified RGB values that simulate the color appearance of a person with a color deficiency. Usually, the simulation of deficient color vision is restricted...conference paper 2006
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Alferdinck, J.W.A.M. (author), TNO Defensie en Veiligheid (author)During night-time driving hazardous objects often appear at mesopic light levels, which are typically measured using light meters with a spectral sensitivity that is only valid for photopic light levels. In order to develop suitable mesopic models a target detection experiment was performed in a driving simulator. While subjects drove along a...article 2006
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Toet, A. (author), TNO Defensie en Veiligheid (author)We present a method to give single band intensified nightvision imagery a natural day-time color appearance. For input, the method requires a true color RGB source image and a grayscale nightvision target image. The source and target image are both transformed into a perceptually decorrelated color space. In this color space a best matching...article 2005
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Toet, A. (author), TNO Technische Menskunde (author)We present a method to give single band intensified nightvision imagery a natural day-time color appearance. For input, the method requires a true color RGB source image and a grayscale nightvision target image. The source and target image are both transformed into a perceptually decorrelated color space. In this color space a best matching...conference paper 2004
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- Vos, J.J. (author), TNO Technische Menskunde (author) article 2004
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Toet, A. (author)We present a method to give single band intensified nightvision imagery a natural day-time color appearance. For input, the method requires a true color RGB source image and a grayscale nightvision target image. The source and target image are both transformed into a perceptually decorrelated color space. In this color space a best matching...conference paper 2004
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Toet, A. (author), TNO Technische Menskunde (author)We present a method to give (fused) multiband night-time imagery a natural day-time color appearance. For input, the method requires a false color RGB image that is produced by mapping 3 individual bands (or the first 3 principal components) of a multiband nightvision system to the respective channels of an RGB image. The false color RGB...conference paper 2003
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TNO Technische Menskunde (author), Toet, A. (author)We present a method to give (fused) multiband night-time imagery a natural day-time color appearance. For input, the method requires a false color RGB image that is produced by mapping 3 individual bands (or the first 3 principal components) of a multiband nightvision system to the respective channels of an RGB image. The false color RGB...conference paper 2003
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Lucassen, M.P. (author), TNO Technische Menskunde (author)This paper describes the application of the combined knowledge on colorimetry, colour imaging (visualization) and colour perception in an aviation related research project. It involves the optimisation of the conspicuity of the colour scheme of an airplane, with the purpose of minimizing the changes of a mid-air collision. Subjects determined...conference paper 2002
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- Walraven, J. (author), Alferdinck, J.W.A.M. (author), TNO Technische Menskunde (author) bookPart 2001
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- Walraven, J. (author), TNO Technische Menskunde (author) bookPart 2001
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- Walraven, J. (author), TNO Technische Menskunde (author) bookPart 2001
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Alferdinck, J.W.A.M. (author), TNO Technische Menskunde (author)The just noticeable deviation (jnd) of the position of light points in the grid structure of matrix signs was determined in a laboratory experiment. The stimuli, consisting of either lines (10 light points) or areas (10ยด10 light points), were presented on a colour VDU-screen. The variables tested were light point distance (2.75, 1.38 or 0.688...bookPart 1998
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Vos, J.J. (author), Berg. T.J.T.P. van den, (author)Recent investigations have strengthened doubts on the validity of the Stiles-Holladay glare formula for large glare angles. Calculations partly based on an earlier theoretical analysis turned out to be helpful to understand the deviations from Stiles-Holladay and to extrapolate the glare function, in its dependence on age and pigmentation, into...article 1997
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Theeuwes, J. (author), Kooi, F.L. (author)When a target object embedded in an array of other objects can be distinguished along a single feature dimension (e.g., colour or shape), it can be detected in parallel. When a target object is defined by a conjunction of stimulus features, search has to be conducted serially, indicating that the visual system is incapable of conducting a...article 1994
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Walraven, J. (author), Janzen, P. (author)In this investigation, carried out under a Youth Health Care postgraduate course in Nijmegen, the stereopsis of a school population of 730 children, aged 4-18 years, was recorded and clinically evaluated. Stereopsis was measured using the TNO test, a random-dot stereo test especially designed for the early detection of amblyopia. The main aims...article 1993
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Vos, J.J. (author), Estevez, O. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)New action spectra are derived for the foveal cones on the basis of three assumptions: (1) the Stiles-Burch (1959) colorimetric data are better than CIE 1931; (2) the long wavelength flanks of the dichromatic luminosity functions offer better anchorage than the confusion loci; and (3) the relative mutual heights per receptor can be derived from...article 1990
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- de Vries-de Mol, B.C. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author) conference paper 1981
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- Instituut voor Zintuigfysiologie TNO (author), Walraven, J. (author) doctoral thesis 1981
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Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)Normal colour vision is presently described in the framework of one or other trichromatic opponent model. The trichromacy finds its origin in three different pigments, these pigments having maximal absorption in different parts of the spectrum. The absorption spectra determine the spectral sensitivities of the three colour mediating systems. The...conference paper 1976
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