منابع مشابه
Recovering reflectance and illumination in a world of painted polyhedra
To be immune to variations in illumination, a vision system needs to be able to decompose images into their illumination and surface reflectance components. Although this problem is greatly underconstrained, the human visual system is able to solve it in diverse situations. Most computational studies thus far have been concerned with strategies for solving the problem in the restricted domain o...
متن کاملWhite-Noise Modulation of High-Frequency High-Intensity Discharge Lamp Ballasts
In this paper, a new method is proposed to avoid acoustic-resonance-related instabilities in metal halide lamps when operated with a high-frequency electronic ballast. Angle modulation of the inverter switching pattern has been used as a vehicle to randomize lamp driving frequency and to limit lamp power spectrum below the instability threshold. The optimal modulating pattern is obtained by stu...
متن کاملHigh-intensity vapor lamp for biological research.
A vapor arc light source has been adapted to the study of the lethal action on bacteria of near-ultraviolet (UV) and visible light. Its use makes possible much shorter exposure times than could be obtained from previously available sources. The output of radiant energy is sufficient to provide a fairly detailed action spectrum for lethality in the long-UV and visible region without the addition...
متن کاملMultiple wavelength illumination in flow cytometry using a single arc lamp and a dispersing element.
The principle of a multiple wavelength illumination method for flow cytometers, based upon a combination of a helium-neon laser and an arc lamp as illumination sources is described. By using a prism, the light from the arc lamp is dispersed and the different colors are imaged at different places on the sample stream. The small angle light scattering from the helium-neon laser light is measured ...
متن کاملExperience with wood lamp illumination and digital photography in the documentation of bruises on human skin.
Bruising is very common in children. Examination of bruising can guide the clinician in ordering radiographic imaging studies of children who have suffered trauma. Additionally, bruising in infants and patterns of bruising that do not match the injury scenario offered by caretakers can raise the suspicion of abuse. This article reports preliminary experience with Wood lamp enhancement of faint ...
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ژورنال
عنوان ژورنال: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
سال: 1979
ISSN: 0019-2341,1349-838X,2185-1506
DOI: 10.2150/jieij1917.63.5_239