Dr George Lovell

Lecturer

School School of Social and Health Sciences

Department Division of Psychology

Contact info

+44 (0)1382 30 8581

Biography

I run Abertay’s Visual Perception and Camouflage Lab which is concerned with the processes underlying visual perception and with the ways in which camouflage undermines these processes.

Our research uses a range of techniques, ranging from visual psychophysics to virtual reality, video games and sometimes behavioural studies with animals.

I’ve been involved in various Knowledge Exchange Projects including developing baseline visibility measures of signs and signals for Network Rail.

I’ve published extensively within the area of visual perception including studies on visual impairment in dementia and camouflage in nature (for example, exploring whether quail choose to lay their eggs in locations that help to camouflage their eggs).

I’ve been interviewed on various media outlets including national radio and newspapers to discuss camouflage in nature.

I am a peer reviewer for Perception, Vision Research, Journal of Vision, Behavioural Ecology and Sociobiology.

I’m also a member of the Vision Sciences Society and the Applied Vision Association.

- You can find more information about current research on my personal webpage: http://vpaclab.site44.com/ -

I am the lead tutor on the PSY204 Cognitive Psychology module.

I am the lead tutor on PSY202 Thoughts on Psychology module.

I also lecture on:

PSY 304 Psychology and Technology

PSY101 Introductory Psychology

I'm interesed in visual perception and camouflage.

See my personal webpage for further details: http://vpaclab.site44.com/

-- For an up to date list please consult Google-Scholar --

 

New Paper!

Egan, J. et al. Edge enhancement improves disruptive camouflage by emphasising false edges and creating pictorial relief. Sci. Rep. 6, 38274; doi: 10.1038/srep38274 (2016).

http://www.nature.com/articles/srep38274

 

Published Papers

Lovell, P. G., Ruxton, G. D., Langridge, K. V., Spencer, K. A., (2013). Egg-Laying Substrate Selection for Optimal Camouflage by Quail, Current Biology, 23 (3), 260-264.

Lovell, P. G., Bloj, M., & Harris, J. M. (2012). Optimal integration of shading and binocular disparity for depth perception. Journal of Vision, 12(1). doi: 10.1167/12.1.1

Cassey, P., Thomas, G., Portugal, S., Maurer, G., Hauber, M., Grim, T., Lovell, P. G., & Miksik, I. (2012). Why are birds’ eggs colourful? Eggshell pigments co-vary with life history and nesting ecology among British breeding non-passerine birds. Biological Journal of the Linnean Society, 106, 15.

Cassey, P., Maurer, G., Lovell, P. G., & Hanley, D. (2011). Conspicuous eggs and colourful hypotheses: testing the role of multiple influences on avian eggshell appearance. Avian Biology Research, 4(4), 185-195. doi: 10.3184/175815511x13207699868421

Metzler-Baddeley, C., Baddeley, R. J., Lovell, P. G., Laffan, A., & Jones, R. W. (2010). Visual Impairments in Dementia With Lewy Bodies and Posterior Cortical Atrophy. Neuropsychology, 24(1), 35-48.

To, M. P. S., Lovell, P. G., Troscianko, T., & Tolhurst, D. J. (2010). Perception of suprathreshold naturalistic changes in colored natural images. Journal of Vision, 10(4).

Tolhurst, D. J., To, M. P. S., Chirimuuta, M., Troscianko, T., Chua, P. Y., & Lovell, P. G. (2010). Magnitude of Perceived Change in Natural Images May Be Linearly Proportional to Differences in Neuronal Firing Rates. Seeing and Perceiving, 23(4), 349-372.

Giachritsis, C. D., Wing, A. M., & Lovell, P. G. (2009). The role of spatial integration in the perception of surface orientation with active touch. Attention Perception & Psychophysics, 71(7), 1628-1640.

Lovell, P. G., Gilchrist, I. D., Tolhurst, D. J., & Troscianko, T. (2009). Search for gross illumination discrepancies in images of natural objects. Journal of Vision, 9(1), 1-14.

Troscianko, T., Benton, C. P., Lovell, P. G., Tolhurst, D. J., & Pizlo, Z. (2009). Camouflage and visual perception. Philosophical Transactions of the Royal Society B-Biological Sciences, 364(1516), 449-461. doi: DOI 10.1098/rstb.2008.0218

To, M., Lovell, P. G., Troscianko, T., & Tolhurst, D. J. (2008). Summation of perceptual cues in natural visual scenes. Proceedings of the Royal Society B-Biological Sciences, 275(1649), 2299-2308. doi: DOI 10.1098/rspb.2008.0692

Troscianko, T., Gregory, L., Hawker, K., Bhatt, A., Porter, G., Lovell, G., & Meese, T. (2008). The big, the bad, and the ugly: an investigation into the effect of video screen size on visual cognition. Perception, 37(2), 312-312.

Lovell, P. G., Tolhurst, D., To, M., & Troscianko, T. (2007). Rapid search for gross illumination discrepancies in upright but not inverted images. Journal of Vision, 7(9), 245. doi: 10.1167/7.9.245

Gilmore, M. A., Jones, C. K., Haynes, A. W., Tolhurst, D. J., To, M., Troscianko, T., Lovell, P. G., Parraga, C. A., & Pickavance, K. (2006). Use of a vision model to quantify the significance of factors effecting target conspicuity - art. no. 62390R. Targets and Backgrounds XII: Characterization and Representation, 6239, R2390-R2390[2308]. doi: Artn 62390r Doi 10.1117/12.673796

Lovell, P. G., Párraga, C. A., Troscianko, T., Ripamonti, C., & Tolhurst, D. J. (2006). Evaluation of a Multiscale Color Model for Visual Difference Prediction. acm Transactions on Applied Perception, 3(3), 155-178.

Lovell, P. G., Tolhurst, D. J., Parraga, C. A., Baddeley, R., Leonards, U., & Troscianko, J. (2005). Stability of the color-opponent signals under changes of illuminant in natural scenes. Journal of the Optical Society of America a-Optics Image Science and Vision, 22(10), 2060-2071.

Spencer, K. A., Wimpenny, J. H., Buchanan, K. L., Lovell, P. G., Goldsmith, A. R., & Catchpole, C. K. (2005). Developmental stress affects the attractiveness of male song and female choice in the zebra finch (Taeniopygia guttata). Behavioral Ecology and Sociobiology, 58(4), 423-428.

Uhlhaas, P. J., Silverstein, S. M., Phillips, W. A., & Lovell, P. G. (2004). Evidence for impaired visual context processing in schizotypy with thought disorder. Schizophrenia Research, 68(2-3), 249-260. doi: DOI 10.1016/s0920-9964(03)00184-1

Conference Abstracts

Lovell, P., Bloj, M., & Harris, J. (2011). How do reliability and timing influence cue-combinations for shading and stereo-disparity? Paper presented at the i-Perception.


Lovell, P. G., Bloj, M., & Harris, J. (2011). Critical timing in combinations of stereo-disparity and shading. Paper presented at the Journal of Vision.
Cristino, F., Lovell, P. G., Gilchrist, I. D., Tolhurst, D. J., Troscianko, T., & Benton, C. P. (2010). Spatiotemporal chromatic statistics of the natural world. Paper presented at the Journal of Vision. http://www.journalofvision.org/content/10/7/1256.abstract

Harris, J. M., Bloj, M., & Lovell, P. G. (2010). Interactions between shading and disparity for depth perception. Paper presented at the Perception. ://000289740100208

Lovell, P. G., Benton, C., Gilchrist, I. D., Tolhurst, D. J., & Troscianco, T. (2009). Characterising the spatio-temporo-chromatic (STC) properties of natural scenes. Paper presented at the Perception. ://000207905000590

Porter, G., Stimpson, L., Tales, A., & Lovell, P. G. (2009). Object recognition is slowed by shadows of inconsistent orientation. Paper presented at the Perception. ://000266855900026

Lovell, P. G., Gilchrist, I. D., Tolhurst, D. J., To, M., & Troscianko, T. (2008). Predicting search efficiency with a low-level visual difference model. Paper presented at the Journal of Vision.

Lovell, P. G., Gilchrist, I. D., Tolhurst, D. J., To, M., & Troscianko, T. (2008). Search with naturalistic stimuli: using a loss-level visual difference model to predict search efficiency. Paper presented at the Perception. ://000263269900038

Lovell, P. G., Gilchrist, I., Tolhurst, D., & Troscianko, T. (2007). Efficient search for gross illumination discrepancies in upright but not inverted images of natural objects. Paper presented at the Perception. ://000252347700022


Lovell, P. G., Gilchrist, I., Tolhurst, D., & Troscianko, T. (2007). Efficient search for discrepant shadows in upright but not inverted images of natural objects. Paper presented at the Perception. ://000250594600408

To, M., Lovell, P., Troscianko, T., & Tolhurst, D. (2007). Visual-difference predictor models for human suprathreshold ratings of differences between natural images: Complex-cell models outperform simple-cell models. Paper presented at the Perception. ://000250594600564

To, M., Lovell, P. G., Troscianko, T., & Tolhurst, D. J. (2007). Summation of suprathreshold cues in complex visual discriminations using natural scene stimuli. Paper presented at the Perception. ://000245525200038

Troscianko, T., To, M., Tolhurst, D. J., & Lovell, P. G. (2007). Three types of processing for shadows: Ignore, select, or suppress? Paper presented at the Perception. ://000250594600193

Troscianko, T., Lovell, P. G., Parraga, C. A., Baddeley, R., & Tolhurst, D. J. (2006). Colour vision and illumination noise in primates and birds. Perception, 35, 227-227.

Lovell, P. G., To, M., Tolhurst, D. J., & Troscianko, T. (2006). Observer ratings for natural scenes under varying illumination: Separating high-level and low-level processes by inversion and a low-level visual-difference predicting model. Paper presented at the Perception. ://000243599300576

Lovell, P. G., Tolhurst, D. J., Ripamonti, C., To, M., & Troscianko, T. (2006). What makes two images look different from each other? Paper presented at the Journal of Vision. http://journalofvision.org/6/6/562/

To, M., Lovell, P. G., Troscianko, T., & Tolhurst, D. J. (2006). Ratings of differences between pairs of natural images are primarily based on low-level cues. Paper presented at the Perception. ://000243599300340

Lovell, P. G. (2005). Manipulating contour smoothness: Evidence that the association-field model underlies contour integration in the periphery. Paper presented at the Spatial Vision. ://000231816700008

Lovell, P. G., Tolhurst, D. J., Parraga, C. A., Baddeley, R. J., Leonards, U., Troscianko, J., & Troscianko, T. (2005). Opponent channel responses to changes in the illuminant of natural scenes for primates and birds. Paper presented at the Perception. ://000232726000141

Lovell, P. G., Troscianko, T., & Parraga, C. A. (2005). Distance judgments based on Rayleigh scattering: The detection of colour changes with distance in blue-yellow opponent channels. Paper presented at the Perception. ://000228584800022

Parraga, C. A., Lovell, P. G., Troscianko, T., & Tolhurst, D. J. (2005). Modelling red-green and blue-yellow colour vision. Paper presented at the Perception. ://000232726000384

Ripamonti, C., Tolhurst, D. J., Lovell, G., & Troscianko, T. (2005). Magnification factors in a V1 model of natural-image discrimination. Paper presented at the Journal of Vision. http://journalofvision.org/5/8/595/

Lovell, P. G. (2004). Manipulating contour smoothness: Evidence that the association-field model underlies contour integration in the periphery. Paper presented at the Perception. ://000224198700560

Tolhurst, D. J., Ripamonti, C., Rowbottom, C. N., Lovell, P. G., Parraga, C. A., & Troscianko, T. (2004). Psychophysical discrimination of natural scenes: Thresholds and subjective ratings. Paper presented at the Perception. ://000224198700356

Troscianko, T., Parraga, C. A., Lovell, P. G., Tolhurst, D., Baddeley, R., & Leonards, U. (2004). Natural illumination, shadows, and primate colour vision. Paper presented at the Perception. ://000224198700138

Lovell, P. G., & Phillips, W. A. (1997). Contour detectability may be a function of both direct and mediated contextual interactions. Paper presented at the Principles of Neural Integration, Madrid.

More Information

Funding

April 2016. Co-investigator, (PI Julie Harris, St Andrews).  Grant total £591k (across all sites). SummaryWhat makes an effective warning signal? This project will look at the link between aposematic colouration in insects and the visual sensitivities of their predators.

- BBSRC (BB/N005945/1, BB/N00602X/1, BB/N006569/1, BB/N007239/1) (Abertay, Newcastle, St Andrews, Bristol).

October 2012. Researcher/Co-investigator, (PI Julie Harris). Grant total £401k (across all sites). From photons to fitness. Using calibrated photogrammetry to ask whether countershading in animals is really optimised for camouflage. In this collaboration with renowned experts in animal camouflage (Graeme Ruxton, Glasgow and Innes Cuthill Bristol). We will examine the long standing question of whether counter-shading pigmentation really does hide animals by concealing their shading cues. (£401,000). The project will accurately render 3D models of organisms under simulated natural light environments. We can then examine whether counter-shading aids concealment using visual search tasks in humans and starlings. (BBSRC BB/J000272/1)

March 2009. Co-Investigator. Do visual plumage cues act as a signal of relatedness in Japanese quail: implications for the optimal outbreeding hypothesis. John Robertson Bequest, £1,255.

July 2007-2010. Researcher/Co-investigator, (PI Tom Troscianko). Natural dynamic scenes and human vision. (£313,391). (EPSRC EP/E037372/1)

August 1994. EU ERASMUS Travel Grant to the University of Padova Cognitive Science summer school, £500.

August 1995, All-fees bursary for the Oxford Summer School in Connectionist Modelling.

Esteem

A member of the Vision Sciences Society and the Applied Vision Association.

Reviews articles for the following journals: Perception, Vision Research, Journal of Vision, Behavioural Ecology and Sociobiology. EPSRC grant reviewer.

Knowledge Exchange

• Conspicuity Camera: Development of a baseline Set of Visibility Measures or Network Rail,with Human Engineering, (2009).

• Use of a vision model to quantify the significance of factors effecting target conspicuity see Gilmore et al. in Publications.

Outreach

Media  (selected)

Nature Research Highlights. Quail pick nests that best hide eggs. Vol 493, January 24th 2013.
NPR radio (4 minute interview) quick-brown-fox-cant-find-camouflaged-quail-eggs, March 2013.
National Geographic Daily News. “Hunting for Quail Eggs? Mind Your Steps”, January 2013.
Deutschlandradio, radio interview on Egg Camouflage (January 2013).
ScienceNow,. ScienceShot: Camouflaged Quail Eggs Hide in Plain Sight (January 2013).
Audobon, Article on quail egg camouflage, April/May 2013
The Guardian, Week in Wildlife. 25th January 2013.
BBC, Living with Alzheimers, diagnostic stimuli, (February, 2009)
Material World, BBC Radio 4, “Bird-Idol”, BA Festival of Science 2007, (13th Sept 2007).
BA Festival of Science York, Bird-Idol, (2007).
Cheltenham Festival of Science, Bird-Idol software, (2006)
 Science Alive! Bird-Idol software, The galleries, Bristol (2006).

Meet the rest of the team

Ms Pamela Miller

Ms Pamela Miller

Division of Psychology | Teaching Fellow

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Dr Janet McLean

Dr Janet McLean

Division of Psychology | Lecturer

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