Search Results - "Lovell, P. George"

Camouflage and visual perception by Troscianko, Tom, Benton, Christopher P, Lovell, P. George, Tolhurst, David J, Pizlo, Zygmunt

“…How does an animal conceal itself from visual detection by other animals? This review paper seeks to identify general principles that may apply in this broad…”
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Three-Dimensional Camouflage: Exploiting Photons to Conceal Form by Penacchio, Olivier, Lovell, P. George, Cuthill, Innes C., Ruxton, Graeme D., Harris, Julie M.

“…Many animals have a gradation of body color, termed “countershading,” where the areas that are typically exposed to more light are darker. One hypothesis is…”
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Edge-Enhanced Disruptive Camouflage Impairs Shape Discrimination by Sharman, Rebecca J., Lovell, P. George

“…Disruptive colouration (DC) is a form of camouflage comprised of areas of pigmentation across a target’s surface that form false edges, which are said to…”
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Is countershading camouflage robust to lighting change due to weather? by Penacchio, Olivier, Lovell, P. George, Harris, Julie M.

“…Countershading is a pattern of coloration thought to have evolved in order to implement camouflage. By adopting a pattern of coloration that makes the surface…”
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Changes in Women's Facial Skin Color over the Ovulatory Cycle are Not Detectable by the Human Visual System by Burriss, Robert P, Troscianko, Jolyon, Lovell, P George, Fulford, Anthony J C, Stevens, Martin, Quigley, Rachael, Payne, Jenny, Saxton, Tamsin K, Rowland, Hannah M

“…Human ovulation is not advertised, as it is in several primate species, by conspicuous sexual swellings. However, there is increasing evidence that the…”
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Egg-Laying Substrate Selection for Optimal Camouflage by Quail by Lovell, P. George, Ruxton, Graeme D., Langridge, Keri V., Spencer, Karen A.

“…Camouflage is conferred by background matching and disruption, which are both affected by microhabitat [1]. However, microhabitat selection that enhances…”
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Stacking Chairs: Local Sense and Global Nonsense by Scott-Samuel, Nicholas E., Ashida, Hiroshi, Lovell, P. George, Meese, Tim S., Schwarzkopf, D. Samuel

“…We report a confusing stimulus which demonstrates the power of local interpretation of three-dimensional structure to disrupt a coherent global perception…”
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Perception of suprathreshold naturalistic changes in colored natural images by To, Michelle P S, Lovell, P George, Troscianko, Tom, Tolhurst, David J

“…Simple everyday tasks, such as visual search, require a visual system that is sensitive to differences. Here we report how observers perceive changes in…”
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Search for gross illumination discrepancies in images of natural objects by Lovell, P George, Gilchrist, Iain D, Tolhurst, David J, Troscianko, Tom

“…Shadows may be "discounted" in human visual perception because they do not provide stable, lighting-invariant, information about the properties of objects in…”
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Dissociating the effect of disruptive colouration on localisation and identification of camouflaged targets by Sharman, Rebecca J., Moncrieff, Stephen J., Lovell, P. George

“…Disruptive camouflage features contrasting areas of pigmentation across the animals’ surface that form false edges which disguise the shape of the body and…”
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Establishing the behavioural limits for countershaded camouflage by Penacchio, Olivier, Harris, Julie M., Lovell, P. George

“…Countershading is a ubiquitous patterning of animals whereby the side that typically faces the highest illumination is darker. When tuned to specific lighting…”
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Orientation to the sun by animals and its interaction with crypsis by Penacchio, Olivier, Cuthill, Innes C., Lovell, P. George, Ruxton, Graeme D., Harris, Julie M.

“…Summary Orientation with respect to the sun has been observed in a wide range of species and has generally been interpreted in terms of thermoregulation and/or…”
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Structural and colored disruption as camouflage strategies in two sympatric Asian box turtle species (Cuora spp.) by Bu, Rongping, Xiao, Fanrong, Lovell, P. George, Ye, Zihao, Shi, Haitao

“…Disruptive coloration is a common camouflage strategy that breaks body outlines and ostensibly blends organisms into complex backgrounds. However, contrasting…”
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Conspicuous Eggs and Colourful Hypotheses: Testing the Role of Multiple Influences on Avian Eggshell Appearance by Cassey, Phillip, Maurer, Golo, Lovell, P. George, Hanley, Daniel

“…The diversity of eggshell colours and patterning across different birds is a fascinating example of the extended avian phenotype. The avian egg's background…”
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Interplay between body reflectance and shape to reduce cues to shading in living animal by Penacchio, Olivier, Lovell, P. George, Cuthill, Innes C., Harris, Julie M.

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Why are birds' eggs colourful? Eggshell pigments co-vary with life-history and nesting ecology among British breeding non-passerine birds by CASSEY, PHILLIP, THOMAS, GAVIN H., PORTUGAL, STEVEN J., MAURER, GOLO, HAUBER, MARK E., GRIM, TOMÁŠ, LOVELL, P. GEORGE, MIKŠÍK, IVAN

“…The colourful appearance of bird eggshells has long fascinated biologists and considerable research effort has focused on the structure and biochemistry of the…”
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Maternal influence on eggshell maculation: implications for cryptic camouflaged eggs by Duval, Camille, Cassey, Phillip, Lovell, P. George, Mikšík, Ivan, Reynolds, S. James, Spencer, Karen A.

“…Egg camouflage may explain the adaptive significance of avian eggshell pigmentation in ground-nesting species. Eggshell maculation (spots) is predominantly due…”
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Magnitude of perceived change in natural images may be linearly proportional to differences in neuronal firing rates by Tolhurst, David J, To, Michelle P S, Chirimuuta, Mazviita, Troscianko, Tom, Chua, Pei-Ying, Lovell, P George

“…We are studying how people perceive naturalistic suprathreshold changes in the colour, size, shape or location of items in images of natural scenes, using…”
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Why are birds' eggs colourful? Eggshell pigments co-vary with life-history and nesting ecology among British breeding non-passerine birds: WHY ARE BIRDS' EGGS COLOURFUL? by CASSEY, PHILLIP, THOMAS, GAVIN H., PORTUGAL, STEVEN J., MAURER, GOLO, HAUBER, MARK E., GRIM, TOMÁŠ, LOVELL, P. GEORGE, MIKŠÍK, IVAN

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P4‐093: Visual impairment in posterior cortical atrophy and dementia with lewy bodies by Metzler‐Baddeley, Claudia, Baddeley, Roland J., Lovell, P. George, Jones, Roy W.

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