Dr. Floris Leonard van Nes Profile

Dr. Floris Leonard van Nes

Consultant at Technische Univ Eindhoven

SPIE Involvement:

Author | Instructor

Proceedings Article | 25 February 2014 Paper

On the delights of being an ex-cataract patient: Visual experiences before and after cataract operations; what they indicate

Floris van Nes

Proceedings Volume 9014, 90140K (2014) https://doi.org/10.1117/12.2037843

KEYWORDS: Eye, Glasses, Visualization, Lenses, Eyeglasses, Brain, Roads, Color vision, Monochromatic aberrations, Image processing

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Proceedings Article | 3 February 2014 Paper

You can't rely on color, yet we all do 2.0 (Manuscript Only)

Floris van Nes

Proceedings Volume 9015, 90150Z (2014) https://doi.org/10.1117/12.2042077

KEYWORDS: Color vision, Visualization, Colorimetry, Color blindness, Color imaging, Electronic imaging, Safety, Design for manufacturability, Manufacturing, Glasses

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Everybody views and uses color from early childhood onwards. But this magnificent property of all objects around us turns out to be elusive if you try to specify it and communicate it to another person. Also, people often don’t know what effects color may have under different conditions. However, color is so important and omnipresent, that people can hardly avoid to 'rely on it' – so they do, in particular on its predictability. Thus, there is a discrepancy between the seeming self-evidence of color and the difficulty in specifying it accurately, for the prevailing circumstances. In order to analyze this situation, and possibly remedy it, a short historic perspective of the utilization and specification of color is given. The 'utilization' includes the emotional effects of color, which are important in, for instance, interior decorating but also play a role in literature and religion. 'Specification' begins with the early efforts by scientists, philosophers and artists to bring some order and understanding in what was observed with and while using color. Color has a number of basic functions: embellishment; attracting attention; coding; and bringing order in text by causing text parts presented in the same color to be judged as belonging together. People with a profession that involves color choices for many others, such as designers and manufacturers of products, including electronic visual displays, should have a fairly thorough knowledge of colorimetry and color perception. Unfortunately, they often don’t, simply because for 'practitioners' whose work involves different aspects, applying color being only one of those, the available tools for specifying and applying color turn out to be too difficult to use. Two consequences of an insufficient knowledge of the effects color may have are given here. The first of these consequences, on color blindness, relates to 8% of the population, but the second one, on reading colored text, bears on everyone. Practical guidance is given, especially on color and legibility. Anyway, the available tools mentioned, such as chromaticity diagrams and color spaces, are mainly the responsibility of the CIE. It would therefore be a laudable initiative if the CIE would not only refine their present systems, but devote some time and energy to the development of a simpler color specification and measurement system. With that it would be worth trying ergonomics research principles, to begin with end-user involvement: investigating what color science practitioners really want and need.

Proceedings Article | 19 January 2010 Paper

Age, colors, and ISO standards

Floris van Nes

Proceedings Volume 7528, 752807 (2010) https://doi.org/10.1117/12.838860

KEYWORDS: Standards development, Visualization, Eye, Light sources and illumination, Autostereoscopic displays, Retina, 3D displays, Color vision, Safety, Target detection

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Proceedings Article | 10 February 2009 Paper

Visually representing reality: aesthetics and accessibility aspects

Floris van Nes

Proceedings Volume 7240, 72401L (2009) https://doi.org/10.1117/12.805847

KEYWORDS: Visualization, Image quality, Photography, Safety, Standards development, Televisions, Eye, Electronic imaging, 3D displays, Biomedical optics

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Proceedings Article | 14 February 2008 Paper

Aesthetics versus utility in electronic imaging

Floris van Nes

Proceedings Volume 6806, 68060Y (2008) https://doi.org/10.1117/12.764857

KEYWORDS: Visualization, Electronic imaging, Standards development, Information visualization, Light sources and illumination, Specular reflections, Cell phones, Safety, Clocks, Televisions

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Proceedings Article | 29 January 2007 Paper

Third-time lucky: why a series of ISO display standards deserves extensive coverage at Electronic Imaging conferences

Floris van Nes

Proceedings Volume 6493, 64930I (2007) https://doi.org/10.1117/12.702377

KEYWORDS: Standards development, Visualization, Flat panel displays, Display technology, Surface conduction electron emitter displays, Visual analytics, Analytical research, Electronic imaging, Organic light emitting diodes, Distributed interactive simulations

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Proceedings Article | 17 January 2005 Paper

Visual display requirements: on standards and their users

Floris van Nes

Proceedings Volume 5667, (2005) https://doi.org/10.1117/12.585844

KEYWORDS: Standards development, Visualization, Flat panel displays, Display technology, Electro optics, Information visualization, Personal digital assistants, CRTs, Metrology, Hand-held displays

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Proceedings Article | 13 January 2003 Paper

Standardization: colorful or dull?

Floris van Nes

Proceedings Volume 5008, (2003) https://doi.org/10.1117/12.474874

KEYWORDS: Standards development, Visualization, Information technology, Image quality standards, CRTs, LCDs, Image quality, Safety, Display technology, Multimedia

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Showing 5 of 8 publications

Course Instructor

SC899: Visual Ergonomics and Aesthetics in Electronic Imaging

Starting from the observation that the use of space, color and typography in text and images as can be seen on the web, on TV, in videotex (in Europe), at conference presentations, and in printed matter often is far from optimal, the course aims at giving writers and editors of such material sufficient knowledge to avoid large errors that will impede legibility and visibility on these text and image-rendering media. Moreover, three different causes for these errors will be uncovered. The course will focus on giving and explaining rules for: (1) the legibility of text as a function of characteristics including font type and size, foreground and background luminance and color, the role and value of luminance and color contrast, and layout factors; (2) legibility and meaning of icons/ symbols/ pictograms as a function of size and internal structure; (3) the role of text color in association with parts of text with the same color by perceptual grouping, accentuation of small parts of the text with a color differing from that of the surrounding text, categorization of parts of the text by coding them with differing colors, and facilitation or inhibition of reading through the generated impression of orderliness or chaos by the amount and distribution of different colors on the display; (4) planned and unforeseen special effects of color, such as color stereoscopy; (5) interaction of spatial, typographical and color effects whereby one or more of the just described effects may be counteracted; and (6) the 'bipolarity' of utility and attractiveness in a number of cases, such as color in reading; structured vs. 'plain' backgrounds for text; matte vs. glossy display screens and -bezels; and transparency vs. 'prettiness' of screen- and magazine pages. Examples of these cases will be given, featuring 'good' and 'bad' ones.

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