Research Topics
| DAVID BRAINARDSummaryAffiliation: University of Pennsylvania Country: USA Publications
Research Grants
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Detail Information
Publications
Trichromatic reconstruction from the interleaved cone mosaic: Bayesian model and the color appearance of small spotsDavid H Brainard
Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA
J Vis 8:15.1-23. 2008..Finally, the model makes testable predictions for future experiments that study how color naming varies with the fine structure of the retinal mosaic...
Perception of color and material properties in complex scenesDavid H Brainard
Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA
J Vis 4:ii-iv. 2004..2003; Pont & Koenderink, 2003; Obein et al., 2004), as well as how geometric aspects of surface reflectance interact with the perception of shape (Fleming et al., 2003)...- Bayesian model of human color constancyDavid H Brainard
Department of Psychology, University of Pennsylvania, Philadelphia, PA, USA
J Vis 6:1267-81. 2006..The model is fit to the data through a parameterization of the prior distribution of illuminant spectral properties. The fit to the data is good, and the derived prior provides a succinct description of human performance... - Surface-illuminant ambiguity and color constancy: effects of scene complexity and depth cuesJames M Kraft
Department of Psychology, University of California at Santa Barbara, 93106, USA
Perception 31:247-63. 2002.... - Contrast, constancy, and measurements of perceived lightness under parametric manipulation of surface slant and surface reflectanceSarah R Allred
Department of Psychology, University of Pennsylvania, 3401 Walnut Street, 302C, Philadelphia, Pennsylvania 19104, USA
J Opt Soc Am A Opt Image Sci Vis 26:949-61. 2009..When it was not, observers' lightness matches were intermediate between contrast matching and lightness constancy. For most observers, surface slant exerted an effect on perceived lightness beyond that explainable by local contrast... - Surface gloss and color perception of 3D objectsBei Xiao
Department of Neuroscience, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
Vis Neurosci 25:371-85. 2008..In addition, the effect of glossy highlights on the color appearance of the test patch was consistent with the results from Experiment 1... - Canine and human visual cortex intact and responsive despite early retinal blindness from RPE65 mutationGeoffrey K Aguirre
Department of Neurology, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
PLoS Med 4:e230. 2007..We therefore studied the cortex of RPE65-mutant dogs before and after retinal gene therapy. Then, we inquired whether there is visual pathway integrity and responsivity in adult humans with LCA due to RPE65 mutations (RPE65-LCA)... - Do common mechanisms of adaptation mediate color discrimination and appearance? Uniform backgroundsJames M Hillis
University of Pennsylvania, Department of Psychology, Philadelphia 19104, USA
J Opt Soc Am A Opt Image Sci Vis 22:2090-106. 2005..This result suggests that effects of the contexts we studied on color appearance and discriminability are controlled by the same underlying mechanism... - Perceived glossiness and lightness under real-world illuminationMaria Olkkonen
Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA
J Vis 10:5. 2010.... - Neural activity within area V1 reflects unconscious visual performance in a case of blindsightPetya D Radoeva
Department of Neurology, Hospital of the University of Pennsylvania, 3499 Spruce Street, Philadelphia, PA 19104, USA
J Cogn Neurosci 20:1927-39. 2008..C.'s impaired psychophysical performance. These results demonstrate that the behavioral features of blindsight may arise in the presence of residual striate responses that are spatially organized and sensitive to contrast variation... - Chromatic properties of horizontal and ganglion cell responses follow a dual gradient in cone opsin expressionLu Yin
Department of Neuroscience, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
J Neurosci 26:12351-61. 2006..In our preparation, rod responses did not completely saturate, even at background light levels typical of outdoor sunlight (5.14 log10 Rh*/rod/s)... - The relation between color discrimination and color constancy: when is optimal adaptation task dependent?Alicia B Abrams
University of Pennsylvania, Department of Psychology, Philadelphia, PA 19104, USA
Neural Comput 19:2610-37. 2007.... - Design of a trichromatic cone arrayPatrick Garrigan
Department of Psychology, Saint Joseph s University, Philadelphia, Pennsylvania, USA
PLoS Comput Biol 6:e1000677. 2010..Thus, the observed cone array design along with a long-wavelength accommodated lens provides a selective advantage: it is maximally informative... - Measurements of the effect of surface slant on perceived lightnessCaterina Ripamonti
Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA
J Vis 4:747-63. 2004..Third, the effect of instructions was small compared to the inter-observer variability. Implications of the data for models of lightness perception are discussed... - Optimal design of photoreceptor mosaics: why we do not see color at nightJeremy R Manning
Neuroscience Graduate Group and Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
Vis Neurosci 26:5-19. 2009..An additional result from our calculations is that regular spatial interleaving of two receptor classes in a dichromatic retina yields performance superior to that of a retina where receptors of the same class are clumped together... - What makes a categorization task difficult?Leola A Alfonso-Reese
Department of Psychology, San Diego State University, California 92182 4611, USA
Percept Psychophys 64:570-83. 2002..The remaining three factors do not explain performance results. We present a challenge to categorization theorists to design models that account for human performance as predicted by covariance complexity... - Physiology and morphology of color-opponent ganglion cells in a retina expressing a dual gradient of S and M opsinsLu Yin
Department of Neuroscience, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
J Neurosci 29:2706-24. 2009..The apparent decline in S/M opponency from superior to inferior retina is consistent with the dual gradient and a model where photoreceptor signals in both superior and inferior retina are processed by the same postreceptoral circuitry... - Does human color constancy incorporate the statistical regularity of natural daylight?Peter B Delahunt
Department of Ophthalmology and Section of Neurobiology, Physiology and Behavior, University of California Davis, CA, USA
J Vis 4:57-81. 2004..This result is difficult to reconcile with the hypothesis that mechanisms of human constancy incorporate the statistics of daylights. Some possible reasons for the discrepancy are discussed... - An equivalent illuminant model for the effect of surface slant on perceived lightnessMarina Bloj
Department of Optometry, University of Bradford, Bradford, UK
J Vis 4:735-46. 2004..The model accounts for the diverse range of results seen in the experimental data in a unified manner, and examination of its parameters allows interpretation of the data that goes beyond what is possible with the raw data alone... - Color constancy under changes in reflected illuminationPeter B Delahunt
Department of Ophthalmology and Section of Neurobiology, Physiology and Behavior, University of California Davis, CA, USA
J Vis 4:764-78. 2004..In a third experiment, observers made asymmetric matches across both types of illuminant change. Here the matches were essentially identical across both types of illuminant change... - Estimation of saturated pixel values in digital color imagingXuemei Zhang
Agilent Technologies Laboratories, MS 26M 3, Palo Alto, California 94304, USA
J Opt Soc Am A Opt Image Sci Vis 21:2301-10. 2004..Extensions of the algorithm to the case in which more than one channel is saturated are also discussed. Both simulations and examples with real images are presented to show that the algorithm is effective... - Distinct mechanisms mediate visual detection and identificationJames M Hillis
Department of Psychology, University of Glasgow, Glasgow G128QB, United Kingdom
Curr Biol 17:1714-9. 2007..These results challenge models that account for perceived lightness entirely through the action of image-encoding mechanisms...
Research Grants
- COLOR CONSTANCYDavid H Brainard; Fiscal Year: 2010..v ..
- COLOR CONSTANCYDAVID BRAINARD; Fiscal Year: 2007....
- COLOR CONSTANCYDAVID BRAINARD; Fiscal Year: 2009..v ..