image stroboscopique


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PDF Stroboscopic effect: contrast threshold function and

Stroboscopic effect Citation for published version (APA): Perz M Sekulovski D Vogels I & Heynderickx I (2018) Stroboscopic effect: Contrast threshold function and dependence on illumination level Journal of the Optical Society of America A Optics Image Science and Vision 35(2) 309-319 https://doi org/10 1364/JOSAA 35 000309 DOI:

  • What is stroboscopic effect?

    Stroboscopic effect is one of the particular temporal light artefacts. In common lighting applications, the stroboscopic effect is an unwanted effect which may become visible if a person is looking at a moving or rotating object which is illuminated by a time-modulated light source.

  • What is the stroboscopic effect contrast threshold function?

    STROBOSCOPIC EFFECT CONTRAST THRESHOLD FUNCTION The results of all five experiments are aggregated to determine the stroboscopic effect contrast threshold function, expressed in terms of the amplitude of the Fourier frequency component, denoted as T in Eq. (1). The visibility thresholds, measured Fig. 5.

  • Does frequency affect stroboscopic visibility?

    An ANOVA confirmed a significant effect of frequency on the visibility of the stroboscopic effect at an illumination level of 50 lux, effect of participant (p < 0.01). Post-hoc comparisons with Bonferroni correction showed that the visibility threshold at all frequencies were significantly different from one another. 7.

  • Why do Stroboscopic images merge at low illumination levels?

    This result would imply that at a low illu-mination level of 5 or 10 lux, the visual persistence time is longer. Hence, at such low illumination levels, the stroboscopic image merges into a blurred image for higher modulation depths than at higher illumination levels.

What is the stroboscopic effect?

The stroboscopic effect, which is the focus of the current study, is defined as a “change in motion perception induced by alightstimulus,theluminanceorspectraldistributionofwhich fluctuates with time, for a static observer in a non-static envi- ronment” [7].

What is the stroboscopic visibility measure?

The stroboscopic visibility measure (SVM) is a method used to quantify the stroboscopic effect visibility in general illumination application. SVM has been defined previously based on a limited number of frequencies and participants.

What is stroboscopic spectroscopy (SVM)?

SVMcan be used for objective assessment by a human observer of visible stroboscopic effects of temporal light modulation of lighting equipment in general indoor applications, with typical indoor light levels (> 100 lx) and with moderate movements of an observer or a nearby handled object (< 4 m/s).

Is the visibility of the stroboscopic effect culture-independent?

Moreover, because the experiments were conducted partly in Europe and partly in China, we can also conclude that the visibility of the stroboscopic effect is culture-independent. Second, the visibility threshold at an illumination of 50 lux at the task surface can be compared to 500 lux for several Fig. 7.

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