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Effects of Shadows on Photocurrent Compensated Integrated Circuits
IEEE Transactions on Nuclear Science, 1973Simple calculations show that high-z components such as wires, capacitors, and solder bonds can easily cast shadows with edges only 25 ?m wide when illuminated with a low energy (E < 60 keV) x-ray beam. If one of these shadows falls between a photocurrent compensating diode-transistor pair, the mismatch in dose can drastically reduce the transient ...
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Interpretation and topographic compensation of conifer canopy self-shadowing
Remote Sensing of Environment, 2008ARTICLE I NFO The self-shadowing of conifer canopies results from the size and arrangement of trees within a stand and is a first-order term controlling radiance from forested terrain at common pixel scales of tens of meters. Although self-shadowing is a useful attribute for forest remote-sensing classification, compensation for the topographic effects
V KANE +5 more
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Shadowing compensator for grid-connected photovoltaic generation system
2014 9th IEEE Conference on Industrial Electronics and Applications, 2014The solar cell array may shade or partially shade. The maximum output current of the shaded or partially shaded solar cells is smaller than that of un-shaded solar cells, and it depends on the degree of shadowing. This can cause multiple peaks in the power-voltage (P-V) curve for the solar cell array and increases the difficultly of maximum power point
Cheng-Huan Chung +3 more
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A new device for half-shadow compensation in photo-elasticity
Applied Scientific Research, 1954A simple optical device is described, which can be attached to the analyzer and which makes the photo-elastic bench suitable for measurements with the half-shadow method.
P. Tegelaar, R. G. Boiten
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Detection of and compensation for shadows in colored urban aerial images
Fifth World Congress on Intelligent Control and Automation (IEEE Cat. No.04EX788), 2004A new method for shadow detection in colored urban aerial images is proposed. First, a new imaging model of shadows is presented, which indicates that hue values of shadowed image areas are larger than those of these areas non-shadowed. Based on this model, a thresholding technique is employed to detect shadowed areas.
null Jianjun Huang +2 more
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Dynamic shadow compensation of aerial images based on color and spatial analysis
Proceedings 15th International Conference on Pattern Recognition. ICPR-2000, 2002This paper describes a method that can improve the visibility of features in shadowed regions in urban aerial images while retaining nonshadowed regions and the natural tint of shadowed regions automatically. The method first calculates the posteriori probabilities of each pixel belonging to shadowed class or nonshadowed class using color features from
Akira Suzuki +3 more
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A Quarter-Wave Compensator with a Sensitive Half-Shadow Device
Journal of the Optical Society of America, 1954Details are given of an instrument capable of measuring large and small optical phase differences between the components of an elliptically polarized radiation. The lowest limit is between 10−4 and 10−5 2π. The compensator consists of an accurate quarter-wave plate (Senarmont compensator) for the wavelength used (5461A) and a Nakamura half-shadow ...
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Contourlet transform based algorithm of shadow compensation for face recognition
2010 International Conference on Image Analysis and Signal Processing, 2010This paper researches of the new multi-scale geometric analysis tool—Contourlet and proposes a new Contourlet multi-threshold method of shadow compensation for uneven illumination face images. The proposed algorithm combines hard threshold with 2D shadow compensation method and selects proper thresholds depending on the sub-band layers of Contourlet ...
null Yu Hai-Long +2 more
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Temperature compensation of shadow mask color picture tubes
IEEE Transactions on Broadcast and Television Receivers, 1969This paper discusses several methods of temperature compensation for shadow mask color television picture tubes. During tube operation, the shadow mask consumes as much as 20W of energy due to bombardment by the electron beams. Thus, the masks run about 200°C above the temperature of the glass envelope.
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Use of a half-shadow plate with uniform field compensators
Journal of Scientific Instruments, 1951The theory is given of a half-shadow arrangement, which consists of a muscovite mica plate mounted so as to cover half the field of view and so that it can rotate about an axis perpendicular to its plane. The arrangement can be employed with any uniform field compensator which is used between crossed polarizer and analyser.
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