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Professor
Department of Psychology
University of Pennsylvania
Suite 302C, 3401Walnut Street
Philadelphia, PA 19104
brainard@psych.upenn.edu
(215) 573-7579 (voice)
(215) 746-6848 (FAX)
I am interested in human vision, machine vision, and computational modeling of visual processing. My primary research is concerned with how the visual system estimates object properties from the information available in the light signal incident at the eye. To study this general problem, I conduct psychophysical experiments to investigate questions such as how object color appearance is related to object surface properties under a wide range of illumination conditions and how color is used to identify objects. I also formulate computational models of visual processing. In addition, I am interested in developing machine visual systems that can mimic human performance and in understanding the neural mechanisms of vision.
Xiao, B., Hurst, B., MacIntyre, L., Brainard, D. H. (2012). The color constancy of three-dimensional objects. Journal of Vision, 12(4:6). http://journalofvision.org/12/4/6, doi:10.1167/12.4.6. Supplemental material.
Allred, S. R., Radonjić, A., Gilchrist, A. L., & Brainard, D. H. (2012). Lightness perception in high dynamic range images: Local and and remote luminance effects. Journal of Vision, 11(2:7), http://www.journalofvision.org/content/12/2/7, doi:10.1167/12.2.7. Supplemental material.
Olkkonen, M. & Brainard, D. H. (2011). Joint effects of illumination geometry and object shape in the perception of surface reflectance. i-Perception 2(9), 1014-1034, http://i-perception.perceptionweb.com/journal/I/volume/2/article/i0480, doi:10.1068/i0480. Supplemental material.
Radonjić, A. Allred, S. R., Gilchrist, A. L., and Brainard, D. H. (2011). The dynamic range of human lightness perception. Current Biology, 21(22), 1931-1936, doi:10.1016/cub.2011.10.013. Download PDF. Download Supplemental PDF. Additional online supplementary material. Video Abstract. [Commentary on this paper appears in Graham, D. J. (2011). Visual perception: Lightness in a high-dyanamic range world. Current Biology, 21(22), R914.]
Lee, T. Y. & Brainard, D. H. (2011). Detection of changes in luminance distributions. Journal of Vision, 10(13:14), http://journalofvision.org/content/10/13/14, doi:10.1167/11.13:14. Supplemental material.
Brainard, D. H. & Maloney, L. T. (2011). Surface color perception and equivalent illumination models. Journal of Vision, 11(5:1), http://www.journalofvision.org/content/11/5/1, doi: 10.1167/11.5.1.
Yin, L., Smith, R. G., Sterling, P., & Brainard, D. H. (2009). Physiology and morphology of color-opponent ganglion cells in a retina expressing a dual gradient of S and M opsins. Journal of Neuroscience, 29, 2706-2724. Download PDF.
Brainard, D. H., Williams, D. R., & Hofer, H. (2008). Trichromatic reconstruction from the interleaved cone mosaic: Bayesian model and the color appearance of small spots. Journal of Vision, 8(5):15, 1-23, http://journalofvision.org/8/5/15/, doi:10.1167/8.5.15.
Guest on NPR's Please Explain: Emotion and Color, The Leonard Lopate Show, February 20, 2009. See http://www.wnyc.org/shows/lopate/episodes/2009/02/20/segments/124355.
Understanding the Appearance of Small Spot Colors. Cambridge Research Systems Lecture, Vision Meeting of the UK Colour Group, January 12, 2006, London. Listen to the talk online. [This work is published as: Brainard, D. H., Williams, D. R., & Hofer, H. (2008). Trichromatic reconstruction from the interleaved cone mosaic: Bayesian model and the color appearance of small spots. Journal of Vision, 8(5):15, 1-23, http://journalofvision.org/8/5/15/, doi:10.1167/8.5.15.]
Played part of Samuel Allison. Fat Man and Little Boy (1989. Paramount Pictures. Directed by R. Joffe. Starring P. Newman, J. Cusak).