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Journal articles on the topic 'Shadow casting'

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1

Supan, Peter, Ines Stuppacher, and Michael Haller. "Image Based Shadowing in Real-Time Augmented Reality." International Journal of Virtual Reality 5, no. 3 (2006): 1–7. http://dx.doi.org/10.20870/ijvr.2006.5.3.2692.

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This work presents an approach to render appropriate shadows with Image Based Lighting in Augmented Reality applications. To approximate the result of environment lighting and shadowing, the system uses a dome of shadow casting light sources. The color of each shadow is determined by the area of the environment behind the casting light source. As a result it is possible that changes in the lighting conditions immidiately affect the shadow casting of virtual objects on real objects
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2

Phillips, Maha Khan. "Shadow Casting." CFA Institute Magazine 26, no. 4 (2015): 24–28. http://dx.doi.org/10.2469/cfm.v26.n4.8.

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3

Cowley, Sue. "Casting a shadow." Early Years Educator 22, no. 8 (2021): 14–16. http://dx.doi.org/10.12968/eyed.2021.22.8.14.

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The pandemic has hit disadvantaged families particularly hard and the rise of domestic abuse in lockdown has been described by the UN as a ‘shadow pandemic’. Sue Cowley analyses the wider implications for children's education and well-being, and what practitioners need to consider.
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4

Layton, Jeffrey C., Lakin Wecker, Adam Runions, and Faramarz F. Samavati. "Cloud Shadow Detection via Ray Casting with Probability Analysis Refinement Using Sentinel-2 Satellite Data." Remote Sensing 15, no. 16 (2023): 3955. http://dx.doi.org/10.3390/rs15163955.

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Analysis of aerial images provided by satellites enables continuous monitoring and is a central component of many applications, including precision farming. Nonetheless, this analysis is often impeded by the presence of clouds and cloud shadows, which obscure the underlying region of interest and introduce incorrect values that bias analysis. In this paper, we outline a method for cloud shadow detection, and demonstrate our method using Canadian farmland data obtained from the Sentinel-2 satellite. Our approach builds on other object-based cloud and cloud shadow detection methods that generate
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5

Bayliff, Claudia J., and Cynthia Carosella. "Casting a Long Shadow." Women's Review of Books 12, no. 8 (1995): 20. http://dx.doi.org/10.2307/4022072.

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6

Mora, Jorge Tordera, Xiaohua Feng, and Liang Gao. "Photoacoustic shadow-casting microscopy." Optics Letters 44, no. 15 (2019): 3897. http://dx.doi.org/10.1364/ol.44.003897.

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7

Spinney, Laura. "Casting a long shadow." Nature 439, no. 7072 (2006): 21. http://dx.doi.org/10.1038/439021a.

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8

Andersen, Elisabeth, and Susanne Kaun. "Shadow Paintings: A Neglected Type of Wall Painting." ICO Iconographisk Post. Nordisk tidskrift för bildtolkning – Nordic Review of Iconography, no. 3-4 (May 14, 2019): 40–56. https://doi.org/10.69945/ico.vi3-4.25637.

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The article presents the results of a pilot study focusing on what are called shadow paintings in Norwegian church interiors from the 17th and 18th centuries. Among the many Baroque illusionistic wall paintings in churches, painted shadows are probably the least known and considered. Shadow paintings are grey or black paintings that surround church furnishings, such as altarpieces, epitaphs and sculptures, as well as pulpits and stalls. They create an illusion of light by “casting” a shadow behind an object, thus enlarging and accentuating the object. Most of the original shadow paintings were
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9

Norman, J. Farley, Thomas E. Dawson, and Shane R. Raines. "The Perception and Recognition of Natural Object Shape from Deforming and Static Shadows." Perception 29, no. 2 (2000): 135–48. http://dx.doi.org/10.1068/p2994.

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In this study of the informativeness of shadows for the perception of object shape, observers viewed shadows cast by a set of natural solid objects and were required to discriminate between them. In some conditions the objects underwent rotation in depth while in other conditions they remained stationary, thus producing both deforming and static shadows. The orientation of the light source casting the shadows was also varied, leading to further alterations in the shape of the shadows. When deformations in the shadow boundary were present, the observers were able to reliably recognize and discr
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10

Jutamulia, Suganda, and George Storti. "Noncoded shadow-casting logic array." Applied Optics 28, no. 21 (1989): 4517. http://dx.doi.org/10.1364/ao.28.004517.

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11

Levick;, W. R. "Blood Vessels Casting a Shadow." Science 299, no. 5615 (2003): 1983–85. http://dx.doi.org/10.1126/science.299.5615.1983.

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12

Jin, Yeying, Wei Ye, Wenhan Yang, Yuan Yuan, and Robby T. Tan. "DeS3: Adaptive Attention-Driven Self and Soft Shadow Removal Using ViT Similarity." Proceedings of the AAAI Conference on Artificial Intelligence 38, no. 3 (2024): 2634–42. http://dx.doi.org/10.1609/aaai.v38i3.28041.

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Removing soft and self shadows that lack clear boundaries from a single image is still challenging. Self shadows are shadows that are cast on the object itself. Most existing methods rely on binary shadow masks, without considering the ambiguous boundaries of soft and self shadows. In this paper, we present DeS3, a method that removes hard, soft and self shadows based on adaptive attention and ViT similarity. Our novel ViT similarity loss utilizes features extracted from a pre-trained Vision Transformer. This loss helps guide the reverse sampling towards recovering scene structures. Our adapti
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13

Pritchard, Olwyn. "Shadow Casting within Gors Fawr Stone Circle." Journal of Skyscape Archaeology 10, no. 2 (2025): 258–66. https://doi.org/10.1558/jsa.31146.

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Shadow casting at British and Irish stone circles has been noted by several researchers. This article reports some observations made at Gors Fawr, a well-preserved stone circle in the Preseli area of West Wales. The circle appears to have multiple gnomons sited on the circumference, giving rise to varied and complex shadow phenomena. As also seen at shadow-casting stone pairs previously studied by the author in the same area, the activity seems to be concentrated at particular points in the solar year – namely the solstices and equinoxes, with a particular focus on the winter solstice.
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14

Fink, Rita. "Inca Shadow Casting Observations in Cuzco." Journal for the History of Astronomy 39, no. 3 (2008): 357–61. http://dx.doi.org/10.1177/002182860803900305.

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15

Schneider, Friedrich. "Casting light on the shadow economy." New Scientist 195, no. 2611 (2007): 46. http://dx.doi.org/10.1016/s0262-4079(07)61717-5.

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16

Magee, Ilene M., and Susan C. Whiston. "Casting No Shadow: Assessing Vocational Overshadowing." Journal of Career Assessment 18, no. 3 (2010): 239–49. http://dx.doi.org/10.1177/1069072710364790.

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17

Allen, Bem P. "Shadows as Sources of Cues for Distance of Shadow-Casting Objects." Perceptual and Motor Skills 89, no. 2 (1999): 571–84. http://dx.doi.org/10.2466/pms.1999.89.2.571.

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18

Kersten, Daniel, Pascal Mamassian, and David C. Knill. "Moving Cast Shadows Induce Apparent Motion in Depth." Perception 26, no. 2 (1997): 171–92. http://dx.doi.org/10.1068/p260171.

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Phenomenally strong visual illusions are described in which the motion of an object‘s cast shadow determines the perceived 3-D trajectory of the object. Simply adjusting the motion of a shadow is sufficient to induce dramatically different apparent trajectories of the object casting the shadow. Psychophysical results obtained with the use of 3-D graphics are reported which show that: (i) the information provided by the motion of an object's shadow overrides other strong sources of information and perceptual biases, such as the assumption of constant object size and a general viewpoint; (ii) th
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19

Debes, John, Rebecca Nealon, Richard Alexander, et al. "The Surprising Evolution of the Shadow on the TW Hya Disk*." Astrophysical Journal 948, no. 1 (2023): 36. http://dx.doi.org/10.3847/1538-4357/acbdf1.

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Abstract We report new total-intensity visible-light high-contrast imaging of the TW Hya disk taken with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope. This represents the first published images of the disk with STIS since 2016, when a moving shadow on the disk surface was reported. We continue to see the shadow moving in a counterclockwise fashion, but in these new images the shadow has evolved into two separate shadows, implying a change in behavior for the occulting structure. Based on radiative-transfer models of optically thick disk structures casting shado
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20

Hawkins, Jane. "Casting Light on the Shadow of Doubt." Science 294, no. 5542 (2001): 528. http://dx.doi.org/10.1126/science.1066252.

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The Science of Conjecture Evidence and Probability before Pascal. James Franklin. Johns Hopkins University Press, Baltimore, 2001. 511 pp. $55, £36.95. ISBN 0-8018-6569-7. Franklin offers a comprehensive survey of the literature of rational methods of dealing with uncertainty from ancient Egypt to Pascal and Fermat's development of the mathematics of probability in the mid-17th century.
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21

Martin, Mark. "Casting a long shadow in the classroom." RNA Biology 11, no. 3 (2014): 244–47. http://dx.doi.org/10.4161/rna.28002.

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22

Raj, Kannan, Dennis W. Prather, Ravindra A. Athale, and Joseph N. Mait. "Performance analysis of optical shadow-casting correlators." Applied Optics 32, no. 17 (1993): 3108. http://dx.doi.org/10.1364/ao.32.003108.

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23

Li, Yao, George Eichmann, and R. R. Alfano. "Optical computing using hybrid encoded shadow casting." Applied Optics 25, no. 16 (1986): 2636. http://dx.doi.org/10.1364/ao.25.002636.

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24

Arrathoon, R., and S. Kozaitis. "Shadow Casting For Multiple-Valued Associative Logic." Optical Engineering 25, no. 1 (1986): 250129. http://dx.doi.org/10.1117/12.7973777.

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25

Laude, Vincent. "Diffraction analysis of pixelated incoherent shadow casting." Optics Communications 138, no. 4-6 (1997): 394–402. http://dx.doi.org/10.1016/s0030-4018(97)00088-6.

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26

Gudmundsson, Karl Sölvi, and Abdul Ahad S. Awwal. "Computer modeling of optical shadow-casting processor." Optics & Laser Technology 32, no. 6 (2000): 443–56. http://dx.doi.org/10.1016/s0030-3992(00)00101-8.

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27

Lin, Senmao, Shuqun Zhing, Caisheng Chen, Ruitang Liu, and Jie Wu. "Optical fuzzy logic array using shadow casting." Microwave and Optical Technology Letters 5, no. 13 (1992): 659–61. http://dx.doi.org/10.1002/mop.4650051302.

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28

Meaden, G. Terence. "Stonehenge and Avebury: Megalithic shadow casting at the solstices at sunrise." Journal of Lithic Studies 4, no. 3 (2017): 39–66. http://dx.doi.org/10.2218/jls.v0i0.1920.

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The paper examines how specific megaliths at Stonehenge and Avebury were positioned relative to others and to particular sunrises such as to produce watchable effects arising from solar movement and resulting lithic shadows. At Stonehenge and environs numerous research expeditions (exceeding 120 that started in 1981) combined with accurate compass analysis, photography and studies of the best plans of the sarsen-stone and bluestone phases have led to explanations for apparent anomalies of stone positioning that have not been clarified before.Firstly, at the summer solstice in the Late Neolithi
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29

Allen, Bem P. "Angles of Shadows as Cues for Judging the Distance of Shadow Casting Objects." Perceptual and Motor Skills 90, no. 3 (2000): 864–66. http://dx.doi.org/10.2466/pms.2000.90.3.864.

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30

Partyka, Jacek. "Casting a shadow backwards and forwards: the para-holocaust fiction of Charles Reznikoff, Isaac Bashevis Singer and Bernrd Malamud." Kultura Popularna 1, no. 50 (2017): 52–67. http://dx.doi.org/10.5604/01.3001.0010.4075.

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31

Goel, Rajeev K., and James W. Saunoris. "Casting a Long Shadow? Cross-border Spillovers of Shadow Economy across American States." Public Finance Review 44, no. 5 (2015): 610–34. http://dx.doi.org/10.1177/1091142115584815.

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32

Lages, Martin. "Casting a Shadow on the Ponzo Size illusion." Journal of Vision 21, no. 9 (2021): 2306. http://dx.doi.org/10.1167/jov.21.9.2306.

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33

Raj, Kannan, and Ravindra A. Athale. "Apodized pixel lenses in compact shadow-casting correlators." Applied Optics 34, no. 11 (1995): 1951. http://dx.doi.org/10.1364/ao.34.001951.

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34

Karim, Mohammad A., Abdul Ahad S. Awwal, and Abdallah K. Cherri. "Polarization-encoded optical shadow-casting logic units: design." Applied Optics 26, no. 14 (1987): 2720. http://dx.doi.org/10.1364/ao.26.002720.

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35

Awwal, Abdul Ahad S., and Mohammad A. Karim. "Median filtering using polarization-encoded optical shadow casting." Applied Optics 28, no. 7 (1989): 1436. http://dx.doi.org/10.1364/ao.28.001436.

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36

Eger, Robert J. "Casting Light on Shadow Government: A Typological Approach." Journal of Public Administration Research and Theory 16, no. 1 (2005): 125–37. http://dx.doi.org/10.1093/jopart/mui040.

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37

Lin, Senmao, Itsuo Kumazawa, and Shuqun Zhang. "Optical fuzzy image processing based on shadow-casting." Optics Communications 94, no. 5 (1992): 397–405. http://dx.doi.org/10.1016/0030-4018(92)90582-c.

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38

Awwal, Abdul Ahad S., and Mohammad A. Karim. "Multiprocessor design using polarization-encoded optical shadow-casting." Applied Optics 29, no. 14 (1990): 2107. http://dx.doi.org/10.1364/ao.29.002107.

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39

Mishra, Rajineesh K. "Optimum Shadow-Casting Illumination for Endoscopic Task Performance." Archives of Surgery 139, no. 8 (2004): 889. http://dx.doi.org/10.1001/archsurg.139.8.889.

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40

Awwal, A. A. S., and M. A. Karim. "Edge detection using polarization-encoded optical shadow-casting." Microwave and Optical Technology Letters 1, no. 10 (1988): 377–80. http://dx.doi.org/10.1002/mop.4650011008.

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41

Lim, Selina, and Chan Hoong Leong. "Casting the Shadow of our Past to Illuminate the Future of Singapore." International Journal of Social Science and Humanity 6, no. 5 (2016): 324–31. http://dx.doi.org/10.7763/ijssh.2016.v6.666.

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42

Kisch, Sean. "Casting the Bigger Shadow: The Methods and Business of Petrucci vs. Attaingnant." Musical Offerings 7, no. 2 (2016): 67–81. http://dx.doi.org/10.15385/jmo.2016.7.2.2.

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43

Meaden, G. Terence. "Drombeg Stone Circle, Ireland, analyzed with respect to sunrises and lithic shadow-casting for the eight traditional agricultural festival dates and further validated by photography." Journal of Lithic Studies 4, no. 3 (2017): 5–37. http://dx.doi.org/10.2218/jls.v0i0.1919.

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A new survey of Drombeg Stone Circle and accurate analysis of shadow effects beginning at particular sunrises of the calendar year has led to a breakthrough in the understanding of lithic symbolism and the intentions behind the construction of this and other Irish monuments including Knowth and Newgrange that also have astronomical alignments. At Drombeg specific standing stones play critical roles at sunrise for all eight of the festival dates as known traditionally and historically for agricultural communities and as now inferred for prehistoric times following the present observation-based
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44

Hao, Li Feng, Ji Zhou, Bo Li, and Long Tu Li. "Fabricating Metal Patterned Ceramic Substance by Tape-Casting." Key Engineering Materials 280-283 (February 2007): 757–58. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.757.

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Tape-casting technology is introduced to fabricate metal-arrayes patterned ceramic substance containing periodic multilayer silver wire structure in the low dielectric constant ceramic matrix for microvave bandgap materials and left hand material application. One important advantage of the metal patterned ceramic substance comparing with the periodic structures fabricated on the printed circuit boards (PCB) using a shadow mask/etching technique is that complex multilayer structure can be designed and fabricated in the ceramic body as well as on the surface by the tape-casting process, while th
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45

Bauer, George. "Experimental Shadow Casting and the Early History of Perspective." Art Bulletin 69, no. 2 (1987): 211. http://dx.doi.org/10.2307/3051018.

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46

Bauer, George. "Experimental Shadow Casting and the Early History of Perspective." Art Bulletin 69, no. 2 (1987): 211–19. http://dx.doi.org/10.1080/00043079.1987.10788420.

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47

Fyath, R. S., S. A. Ali, and M. S. Alam. "Four-operand parallel optical computing using shadow-casting technique." Optics & Laser Technology 37, no. 3 (2005): 251–57. http://dx.doi.org/10.1016/j.optlastec.2004.04.006.

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48

Zhang, Shuqun, Senmao Lin, and Caisheng Cheng. "Optical fuzzy vector-matrix composition operation using shadow-casting." Optics Communications 94, no. 6 (1992): 497–500. http://dx.doi.org/10.1016/0030-4018(92)90593-g.

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49

Cluff, KennethW. "Fast shadow-casting using a scanline Z-buffer approach." Journal of Molecular Graphics 10, no. 1 (1992): 47–48. http://dx.doi.org/10.1016/0263-7855(92)80025-9.

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50

Amin, Mohammad, and Cedric Okou. "Casting a shadow: Productivity of formal firms and informality." Review of Development Economics 24, no. 4 (2020): 1610–30. http://dx.doi.org/10.1111/rode.12697.

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