Dr David Tolhurst University positionSenior Lecturer Dr David Tolhurst is pleased to consider applications from prospective PhD students. DepartmentsDepartment of Physiology, Development and Neuroscience Home pagehttp://www.pdn.cam.ac.uk/staff/t... Research ThemesInterestsVisual coding of natural scenes. Information coding in the visual cortex studied by single unit recording, computational models and psychophysical discrimination by human observers. Visual deficits in developmental or acquired visual abnormality. Research Focus
EquipmentComputational modelling Electrophysiological recording techniques Psychophysics CollaboratorsNo collaborators listed Associated News ItemsKey publicationsLovell PG, Párraga CA, Ripamonti C, Troscianko T, Tolhurst DJ (2006), “Evaluation of a multi-scale color model for visual difference prediction” ACM Transactions on Applied Perception 3:155-178 Párraga CA, Troscianko T, Tolhurst DJ (2005), “The effects of amplitude-spectrum statistics on foveal and peripheral discrimination of changes in natural images and a multi resolution model” Vision Research 45:3145-3168 Details Smyth D, Willmore B, Thompson ID, Baker GE, Tolhurst DJ (2003), “The receptive-field organisation of simple cells in primary visual cortex (V1) of ferrets under natural scene stimulation” Journal of Neuroscience 23:4746-4759 Publications2013Asher MF, Tolhurst DJ, Troscianko T, Gilchrist ID (2013), “Regional effects of clutter on human target detection performance.” J Vis 13(5) Details Clatworthy PL, Warburton EA, Tolhurst DJ, Baron JC (2013), “Visual Contrast Sensitivity Deficits in 'Normal' Visual Field of Patients with Homonymous Visual Field Defects due to Stroke: A Pilot Study.” Cerebrovasc Dis 36(5-6):329-35 Details 2012Willmore BD, Bulstrode H, Tolhurst DJ (2012), “Contrast normalization contributes to a biologically-plausible model of receptive-field development in primary visual cortex (V1).” Vision Res 54:49-60 Details 2011To MP, Baddeley RJ, Troscianko T, Tolhurst DJ (2011), “A general rule for sensory cue summation: evidence from photographic, musical, phonetic and cross-modal stimuli.” Proc Biol Sci 278(1710):1365-72 Details To MP, Gilchrist ID, Troscianko T, Tolhurst DJ (2011), “Discrimination of natural scenes in central and peripheral vision.” Vision Res 51(14):1686-98 Details 2010To MP, Lovell PG, Troscianko T, Tolhurst DJ (2010), “Perception of suprathreshold naturalistic changes in colored natural images.” J Vis 10(4):12.1-22 Details Tolhurst DJ, To MP, Chirimuuta M, Troscianko T, Chua PY, Lovell PG (2010), “Magnitude of perceived change in natural images may be linearly proportional to differences in neuronal firing rates.” Seeing Perceiving 23(4):349-72 Details 2009Lovell PG, Gilchrist ID, Tolhurst DJ, Troscianko T (2009), “Search for gross illumination discrepancies in images of natural objects.” J Vis 9(1):37.1-14 Details Tolhurst DJ, Smyth D, Thompson ID (2009), “The sparseness of neuronal responses in ferret primary visual cortex.” J Neurosci 29(8):2355-70 Details Troscianko T, Benton CP, Lovell PG, Tolhurst DJ, Pizlo Z (2009), “Camouflage and visual perception.” Philos Trans R Soc Lond B Biol Sci 364(1516):449-61 Details 2008To M, Lovell PG, Troscianko T, Tolhurst DJ (2008), “Summation of perceptual cues in natural visual scenes.” Proc Biol Sci 275(1649):2299-308 Details 2005Carandini M, Demb JB, Mante V, Tolhurst DJ, Dan Y, Olshausen BA, Gallant JL, Rust NC (2005), “Do we know what the early visual system does?” J Neurosci 25(46):10577-97 Details Chirimuuta M, Tolhurst DJ (2005), “Does a Bayesian model of V1 contrast coding offer a neurophysiological account of human contrast discrimination?” Vision Res 45(23):2943-59 Details Chirimuuta M, Tolhurst DJ (2005), “Accuracy of identification of grating contrast by human observers: Bayesian models of V1 contrast processing show correspondence between discrimination and identification performance.” Vision Res 45(23):2960-71 Details Lauritzen JS, Tolhurst DJ (2005), “Contrast constancy in natural scenes in shadow or direct light: A proposed role for contrast-normalisation (non-specific suppression) in visual cortex.” Network 16(2-3):151-73 Details Lovell PG, Tolhurst DJ, Párraga CA, Baddeley R, Leonards U, Troscianko J, Troscianko T (2005), “Stability of the color-opponent signals under changes of illuminant in natural scenes.” J Opt Soc Am A Opt Image Sci Vis 22(10):2060-71 Details 2004Caywood MS, Willmore B, Tolhurst DJ (2004), “Independent components of color natural scenes resemble V1 neurons in their spatial and color tuning.” J Neurophysiol 91(6):2859-73 Details 2003Akerman CJ, Tolhurst DJ, Morgan JE, Baker GE, Thompson ID (2003), “Relay of visual information to the lateral geniculate nucleus and the visual cortex in albino ferrets.” J Comp Neurol 461(2):217-35 Details Chirimuuta M, Clatworthy PL, Tolhurst DJ (2003), “Coding of the contrasts in natural images by visual cortex (V1) neurons: a Bayesian approach.” J Opt Soc Am A Opt Image Sci Vis 20(7):1253-60 Details Clatworthy PL, Chirimuuta M, Lauritzen JS, Tolhurst DJ (2003), “Coding of the contrasts in natural images by populations of neurons in primary visual cortex (V1).” Vision Res 43(18):1983-2001 Details Hoffmann MB, Tolhurst DJ, Moore AT, Morland AB (2003), “Organization of the visual cortex in human albinism.” J Neurosci 23(26):8921-30 Details Smyth D, Willmore B, Baker GE, Thompson ID, Tolhurst DJ (2003), “The receptive-field organization of simple cells in primary visual cortex of ferrets under natural scene stimulation.” J Neurosci 23(11):4746-59 Details 2002Párraga CA, Troscianko T, Tolhurst DJ (2002), “Spatiochromatic properties of natural images and human vision.” Curr Biol 12(6):483-7 Details 2001Willmore B, Tolhurst DJ (2001), “Characterizing the sparseness of neural codes.” Network 12(3):255-70 Details 2000Párraga CA, Tolhurst DJ (2000), “The effect of contrast randomisation on the discrimination of changes in the slopes of the amplitude spectra of natural scenes.” Perception 29(9):1101-16 Details Párraga CA, Troscianko T, Tolhurst DJ (2000), “The human visual system is optimised for processing the spatial information in natural visual images.” Curr Biol 10(1):35-8 Details Tadmor Y, Tolhurst DJ (2000), “Calculating the contrasts that retinal ganglion cells and LGN neurones encounter in natural scenes.” Vision Res 40(22):3145-57 Details Tolhurst DJ, Tadmor Y (2000), “Discrimination of spectrally blended natural images: optimisation of the human visual system for encoding natural images.” Perception 29(9):1087-100 Details Willmore B, Watters PA, Tolhurst DJ (2000), “A comparison of natural-image-based models of simple-cell coding.” Perception 29(9):1017-40 Details 1998Baker GE, Thompson ID, Krug K, Smyth D, Tolhurst DJ (1998), “Spatial-frequency tuning and geniculocortical projections in the visual cortex (areas 17 and 18) of the pigmented ferret.” Eur J Neurosci 10(8):2657-68 Details 1997Tolhurst DJ, Heeger DJ (1997), “Comparison of contrast-normalization and threshold models of the responses of simple cells in cat striate cortex.” Vis Neurosci 14(2):293-309 Details Tolhurst DJ, Heeger DJ (1997), “Contrast normalization and a linear model for the directional selectivity of simple cells in cat striate cortex.” Vis Neurosci 14(1):19-25 Details Tolhurst DJ, Tadmor Y (1997), “Band-limited contrast in natural images explains the detectability of changes in the amplitude spectra.” Vision Res 37(23):3203-15 Details Tolhurst DJ, Tadmor Y (1997), “Discrimination of changes in the slopes of the amplitude spectra of natural images: band-limited contrast and psychometric functions.” Perception 26(8):1011-25 Details 1994Tadmor Y, Tolhurst DJ (1994), “Discrimination of changes in the second-order statistics of natural and synthetic images.” Vision Res 34(4):541-54 Details 1993Tadmor Y, Tolhurst DJ (1993), “Both the phase and the amplitude spectrum may determine the appearance of natural images.” Vision Res 33(1):141-5 Details 1992Tolhurst DJ, Lewis PR (1992), “Effect of myelination on the conduction velocity of optic nerve fibres.” Ophthalmic Physiol Opt 12(2):241-3 Details Tolhurst DJ, Tadmor Y, Chao T (1992), “Amplitude spectra of natural images.” Ophthalmic Physiol Opt 12(2):229-32 Details 1991Tolhurst DJ, Dean AF (1991), “Evaluation of a linear model of directional selectivity in simple cells of the cat's striate cortex.” Vis Neurosci 6(5):421-8 Details 1990Tolhurst DJ, Dean AF (1990), “The effects of contrast on the linearity of spatial summation of simple cells in the cat's striate cortex.” Exp Brain Res 79(3):582-8 Details 1989Tadmor Y, Tolhurst DJ (1989), “The effect of threshold on the relationship between the receptive-field profile and the spatial-frequency tuning curve in simple cells of the cat's striate cortex.” Vis Neurosci 3(5):445-54 Details Tolhurst DJ (1989), “The amount of information transmitted about contrast by neurones in the cat's visual cortex.” Vis Neurosci 2(4):409-13 Details 1988Robson JG, Tolhurst DJ, Freeman RD, Ohzawa I (1988), “Simple cells in the visual cortex of the cat can be narrowly tuned for spatial frequency.” Vis Neurosci 1(4):415-9 Details Tolhurst DJ, Ling L (1988), “Magnification factors and the organization of the human striate cortex.” Hum Neurobiol 6(4):247-54 Details 1987Tolhurst DJ, Dean AF (1987), “Spatial summation by simple cells in the striate cortex of the cat.” Exp Brain Res 66(3):607-20 Details 1986Dean AF, Tolhurst DJ (1986), “Factors influencing the temporal phase of response to bar and grating stimuli for simple cells in the cat striate cortex.” Exp Brain Res 62(1):143-51 Details Field DJ, Tolhurst DJ (1986), “The structure and symmetry of simple-cell receptive-field profiles in the cat's visual cortex.” Proc R Soc Lond B Biol Sci 228(1253):379-400 Details 1983Dean AF, Tolhurst DJ (1983), “On the distinctness of simple and complex cells in the visual cortex of the cat.” J Physiol 344:305-25 Details Ling L, Tolhurst DJ (1983), “Recovering the parameters of finite mixtures of normal distributions from a noisy record: an empirical comparison of different estimating procedures.” J Neurosci Methods 8(4):309-33 Details Tolhurst DJ, Movshon JA, Dean AF (1983), “The statistical reliability of signals in single neurons in cat and monkey visual cortex.” Vision Res 23(8):775-85 Details 1982Dean AF, Bunch ST, Tolhurst DJ, Lewis PR (1982), “The distribution of acetylcholinesterase in the lateral geniculate nucleus of the cat and monkey.” Brain Res 244(1):123-34 Details Dean AF, Tolhurst DJ, Walker NS (1982), “Non-linear temporal summation by simple cells in cat striate cortex demonstrated by failure of superposition.” Exp Brain Res 45(3):456-8 Details Tolhurst DJ, Thompson ID (1982), “Organization of neurones preferring similar spatial frequencies in cat striate cortex.” Exp Brain Res 48(2):217-27 Details 1981Tolhurst DJ, Dean AF, Thompson ID (1981), “Preferred direction of movement as an element in the organization of cat visual cortex.” Exp Brain Res 44(3):340-2 Details Tolhurst DJ, Movshon JA, Thompson ID (1981), “The dependence of response amplitude and variance of cat visual cortical neurones on stimulus contrast.” Exp Brain Res 41(3-4):414-9 Details Tolhurst DJ, Thompson ID (1981), “On the variety of spatial frequency selectivities shown by neurons in area 17 of the cat.” Proc R Soc Lond B Biol Sci 213(1191):183-99 Details 1980Tolhurst DJ, Walker NS, Thompson ID, Dean AF (1980), “Non-linearities of temporal summation in neurones in area 17 of the cat.” Exp Brain Res 38(4):431-5 Details 1978Movshon JA, Thompson ID, Tolhurst DJ (1978), “Receptive field organization of complex cells in the cat's striate cortex.” J Physiol 283:79-99 Details Movshon JA, Thompson ID, Tolhurst DJ (1978), “Spatial summation in the receptive fields of simple cells in the cat's striate cortex.” J Physiol 283:53-77 Details Movshon JA, Thompson ID, Tolhurst DJ (1978), “Spatial and temporal contrast sensitivity of neurones in areas 17 and 18 of the cat's visual cortex.” J Physiol 283:101-20 Details Tolhurst DJ, Barfield LP (1978), “Interactions between spatial frequency channels.” Vision Res 18(8):951-8 Details 1977Tolhurst DJ (1977), “Colour-coding properties of sustained and transient channels in human vision.” Nature 266(5599):266-8 Details 1976de Monasterio FM, Gouras P, Tolhurst DJ (1976), “Spatial summation, response pattern and conduction velocity of ganglion cells of the rhesus monkey retina.” Vision Res 16(6):674-8 Details 1975De Monasterio FM, Gouras P, Tolhurst DJ (1975), “Concealed colour opponency in ganglion cells of the rhesus monkey retina.” J Physiol 251(1):217-29 Details De Monasterio FM, Gouras P, Tolhurst DJ (1975), “Trichromatic colour opponency in ganglion cells of the rhesus monkey retina.” J Physiol 251(1):197-216 Details Tolhurst DJ (1975), “Sustained and transient channels in human vision.” Vision Res 15:1151-5 Details Tolhurst DJ (1975), “Reaction times in the detection of gratings by human observers: a probabilistic mechanism.” Vision Res 15:1143-9 Details Tolhurst DJ, Dealy RS (1975), “The detection and identification of lines and edges.” Vision Res 15(12):1367-72 Details Tolhurst DJ, Movshon JA (1975), “Spatial and temporal contrast sensitivity of striate cortical neurones.” Nature 257(5528):674-5 Details Tolhurst DJ, Thompson PG (1975), “Orientation illusions and after-effects: inhibition between channels.” Vision Res 15:967-72 Details 1974Dealy RS, Tolhurst DJ (1974), “Is spatial adaptation an after-effect of prolonged inhibition?” J Physiol 241(1):261-70 Details 1973Kulikowski JJ, Tolhurst DJ (1973), “Psychophysical evidence for sustained and transient detectors in human vision.” J Physiol 232(1):149-62 Details Shapley RM, Tolhurst DJ (1973), “Edge detectors in human vision.” J Physiol 229(1):165-83 Details Sharpe CR, Tolhurst DJ (1973), “Orientation and spatial frequency channels in peripheral vision.” Vision Res 13(11):2103-12 Details Sharpe CR, Tolhurst DJ (1973), “The effects of temporal modulation on the orientation channels of the human visual system.” Perception 2(1):23-9 Details Tolhurst DJ (1973), “Separate channels for the analysis of the shape and the movement of moving visual stimulus.” J Physiol 231(3):385-402 Details Tolhurst DJ, Sharpe CR, Hart G (1973), “The analysis of the drift rate of moving sinusoidal gratings.” Vision Res 13(12):2545-55 Details 1972Tolhurst DJ (1972), “Adaptation to square-wave gratings: inhibition between spatial frequency channels in the human visual system.” J Physiol 226(1):231-48 Details Tolhurst DJ (1972), “On the possible existance of edge detector neurones in the human visual system.” Vision Res 12(5):797-804 Details Tolhurst DJ, Hart G (1972), “A psychophysical investigation of the effects of controlled eye movements on the movement detectors of the human visual system.” Vision Res 12(9):1441-6 Details |