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Wilson Geisler, Director SEA 4.328A, Mailcode A8000, Austin, TX 78712 • 512-471-5380

Lawrence K Cormack

Professor Ph.D., University of California at Berkeley

Lawrence K Cormack
" Make your best guess, double it, then go to the next unit up – that's how long it's going take you. "

Contact

Biography

Larry Cormack is a Professor of Psychology and Neuroscience at the University of Texas at Austin, and is an active member of the Center for Perceptual Systems.  He received his B.S. with Highest Honors in Psychology from the University of Florida in 1986 and his Ph.D. in Physiological Optics from the University of California, Berkeley in 1992.

Dr. Cormack’s primary research interest is how the brain processes the motion of objects through the 3D environment. This topic is of interest because it is of utmost behavioral importance, it is not well understood, and yet it is a synthesis of two topics that are reasonably well understood (the binocular perception of depth, and the perception of 2D motion). Dr. Cormack is also interested in natural scene statistics and their relation to the evolution of the visual system, particularly with regard to depth and motion processing. 

Dr. Cormack teaches mostly graduate statistics.

Interests

Visual System; Natural Scene Statistics; Data Analysis and Visualization

Publications

Pohl, J., Atkinson, N, & Cormack, L.K. (under revision) Bootstrapping Analysis of Tolerance to Ethanol in Drosophila Melanogaster. PLoS ONE.

Kane, J.R.,  Ciucci, M.R.,  Jacobs, A.N.,  Tews, N., Russell, J.A., Ahrens, A.M., Ma S.T., Britt, J.M., Cormack, L.K. & Schallert, T. (2011) Assessing the role of dopamine in limb and cranial-oromotor control in a rat model of Parkinson’s disease. Journal of Communication Disorders, 44, 5, 529-537.
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Czuba, T. B., Rokers, B., Guillet, K., Huk, A. C. & Cormack, L. K. (2011) 3D motion aftereffects reveal distinct direction-selective mechanisms for binocular processing of motion through depth. Journal of Vision.  11(10): 18; doi:10.1167/11.10.18
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O’Bryant, A.J.,  Allred, R.P., Maldonado, M.A., Cormack, L.K. & Jones, T.A. (2011) Breeder and batch-dependent variability in the acquisition and performance of a motor skill in adult Long–Evans rats. Behavioural Brain Research 224 (2011) 112–12. doi:10.1016/j.bbr.2011.05.028
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Liu, Y., Cormack L. & Bovik, A. (2011) Statistical modeling of 3D natural scenes with application to Bayesian stereopsis. IEEE Transactions on Image Processing. 20 (9).  doi: 10.1109/TIP.2011.2118223 
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Rokers, B., Czuba, T.B., Cormack, L.K. & Huk, A.C. (2011) Motion processing with two eyes in three dimensions. Journal of Vision. vol. 11 no. 2. doi: 10.1167/11.2.10
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Liu, Y., Cormack, L.K., & Bovik, A.C. (2010) Dichotomy between luminance and disparity features at binocular fixations. Journal of Vision 10(12), 1-17.
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Czuba, T. B., Rokers, B., Huk, A. C. & Cormack, L. K. (2010) Speed and eccentricity tuning reveals a central role for the velocity-based cue to 3D visual motion. Under revision at Journal of Neurophysiology. 104, 2886-2899. doi:10.1152/jn.00585.2009
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Seshadrinathan, K., Soundararajan, R., Bovik, A. & Cormack, L. K. (2010). Study of subjective and objective quality assessment of video. IEEE Transactions on Image Processing, 19(6), 1427-1441. (peer-reviewed)

Jackson, R.E. & Cormack, L.K. (2010). Reducing the presence of navigation risk eliminates strong environmental illusions. Journal of Vision, 10(5):9, 1-8. doi:10.1167/10.5.9 (peer-reviewed)
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Seshadrinathan, K., Soundararajan, R., Bovik, A. & Cormack, L. K. (2010). A subjective study to evaluate video quality assessment algorithms. Human Vision and Electronic Imaging XV, Proceedings of SPIE, 7527, 7527OH-1-10. doi:10.1117/12.845382

Seshadrinathan, K., Soundararajan, R., Bovik, A. & Cormack, L. K. (2010). A subjective study to evaluate video quality assessment algorithms. Human Vision and Electronic Imaging XV, Proceedings of SPIE, 7527, 7527OH-1-10. doi:10.1117/12.845382

Rokers, B., Cormack, L.K. & Huk, A.C. (2009). Disparity- and velocity- based signals for 3D motion perception in human MT+. Nature Neuroscience, 12, 1050-1055.
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van der Linde, I., Rajashekar, U., Bovik, A.C. & Cormack, L.K. (2009). Visual memory for fixated regions of natural scenes dissociates attraction and recognition. Perception. volume 38, pages 1152 - 1171.

University of Texas at Austin (2009, July 21). Brain's Center For Perceiving 3-D Motion Is Identified. ScienceDaily. Retrieved July 21, 2009, from http://www.sciencedaily.com/releases/2009/07/090721091831.htm

Tavassoli, A., van der Linde, I., Bovik, A.C. & Cormack, L.K. (2009, September) Eye movements selective for spatial frequency and orientation during active visual search. Vision Research, 49(2), 173-181.
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Liu, Y., Bovik, A.C. & Cormack, L. (2008, September) Disparity Statistics in Natural Scenes. Journal of Vision, 8(11), 1-14.
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Monaco, J.P., Bovik, A.C. & Cormack, L.K. (2008, September) Nonlinearities in Stereoscopic Phase-Differencing. IEEE Transactions on Image Processing, 17(9), pgs. 1672-1684.
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Jackson, R.E. & Cormack, L.K., (2008, September) Evolved navigation theory and the environmental vertical illusion. Evolution and Human Behavior, 29(5), 299-304.
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Spinetta, M.J., Woodlee, M.T., Feinberg, L.M., Stroud, C., Schallert, K., Cormack, L.K. & Schallert, T. (2008, September) Alcohol-induced retrograde memory impairment in rats: prevention by caffeine. Psychopharmacology, 201(3), 361-371.
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Kirson, D., Huk, A.C. & Cormack, L.K. (2008, September) Quantifying spatial uncertainty of visual area boundaries in neuroimaging data. Journal of Vision, 8(10), 1-15.
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Rokers, B., Cormack, L.K. & Huk, A.C. (2008, September) Strong percepts of motion through depth without strong percepts of position in depth. Journal of Vision, 8(4), 1-10.
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Woodlee, M.T., Kane, J.R., Chang, J., Cormack, L.K. & Schallert, T. (2008, September) Enhanced function in the good forelimb of hemi-parkinson rats: Compensatory adaptation for contralateral postural instability? Experimental Neurology, 211(2), 511-517.
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Rajashekar, U., van der Linde, I., Bovik, A.C. & Cormack, L.K. (2008, September) GAFFE: A Gaze-Attentive Fixation Finding Engine. IEEE Transactions on Image Processing, 17(4).
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Tavassoli, A., van der Linde, I., Bovik, A.C. & Cormack, L.K. (2007, September) Orientation anisotropies in visual search revealed by noise. Journal of Vision, 7(12), 1-8.
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Rajashekar, U., van der Linde, I. Bovik, A.C. & Cormack, L.K. (2007, September) Foveated Analysis of Image Features at Fixations. Vision Research, 41, 3160-3172.
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Jackson, R.E. & Cormack, L.K. (2007, September) Evolved navigation theory and the descent illusion. Perception & Psychophysics, 69(3), 353-362.
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Tavassoli, A., van der Linde, I. Bovik, A.C., & Cormack, L.K. (2007, September) An Efficient Technique for  Revealing Visual Search Strategies with Classification Images. Perception & Psychophysics, 69(1), 103-112.
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Rajashekar, U., Arnow, T., Bovik, A. & Cormack, L. (2006, September) Gaze-centric image analysis for efficient visual search. SPIE Newsroom.
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Rajashekar, U., Bovik, A.C. & Cormack, L.K. (2006, September) Visual search in noise: Revealing the influence of structural cues by gaze-contingent classification image analysis. Journal of Vision, 6(4), 379-386.
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Cormack, L. (2005) Mathematical models of human vision. In A. Bovik (Ed.), Handbook of Image and Video Processing. Second Edition. New York: Academic Press.

Sheikh, H.R., Bovik, A.C., & Cormack, L.K. (2005, September) No-Reference Quality Assessment using Natural Scene Statistics: JPEG2000. IEEE Transactions on Image Processing, Vol. 14, No. 11, 1918-1927.
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Rajashekar, U., Cormack, L.K. & Bovik, A.C. (2004) Point of gaze analysis reveals visual search strategies. Proc. of SPIE, Vol:5292.
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Sheikh, H.R., Bovik, A.C., Cormack, L. (2003) Blind Quality Assessment of JPEG2000 Compressed Images Using Natural Scene Statistics. Proc. IEEE Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA.

Rajashekar, U., Cormack, L.K. & Bovik, A.C. (2002) Visual search: structure from noise. Proceedings of the Eye Tracking Research & Applications Symposium 2002, New Orleans, LA, USA, March 25-27, 2002. ACMPress.
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Stevenson, S.B. & Cormack, L.K. (2000, September) A contrast paradox in stereopsis, motion perception, and vernier acuity. Vision Research, 40, 2881-2884.
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Chen, T., Bovik, A.C. & Cormack, L.K. (1999, September) Stereoscopic ranging by matching image modulations. IEEE Transactions on Image Processing, 8, 785-797.
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Cormack, L.K., Stevenson, S.B. & Landers, D.D. (1997, September) Interactions of Spatial Frequency and unequal Monocular Contrasts in Stereopsis. Perception, 26, 1121-1136.
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Cormack, L.K., Landers, D.D. & Ramakrishnan, S. (1997, September) Element density and the efficiency of binocular matching. Journal of the Optical Society of America, A(14), 723-730.
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Landers, D.D. & Cormack, L.K. (1997, September) Asymmetries and errors in perception of depth from disparity suggest a multi-component model of disparity processing. Perception & Psychophysics, 59, 219-231.
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Cormack, L.K. & Riddle, R.B. (1996, September) Binocular correlation detection with oriented dynamic random-line stereograms. Vision Research, 36, 2303-2310.
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Cormack, L.K., Stevenson, S.B. & Schor C.M. (1994, September) An upper limit to the binocular combination of stimuli. Vision Research, 34, 2599-2608.
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Stevenson, S.B., Cormack, L.K. & Schor.C.M. (1994, September) The effect of stimulus contrast and interocular correlation on disparity vergence. Vision Research, 34, 383-396.
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Cormack, L.K., Stevenson, S.B. & Schor C.M. (1993, September) Disparity-tuned channels of the human visual system. Visual Neuroscience, 10, 585-596.
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Stevenson, S.B., Cormack, L.K., Schor C.M. & Tyler, C.W. (1992, September) Disparity tuning in mechanisms of human stereopsis. Vision Research, 32, 1685-1694.
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Schor, C.M., Alexander, J., Cormack, L. & Stevenson, S. (1992) A negative feedback control model of proximal convergence and accommodation. Ophthalmic and Physiological Optics, 12, 307-318.

Cormack, L.K., Stevenson, S.B. & Schor C.M. (1991, September) Interocular correlation, luminance contrast and cyclopean processing. Vision Research, 31, 2195-2207.
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Cormack, L., Stevenson, S. & Schor.C. (1991, September) Depth attraction and repulsion in random dot stereograms. Vision Research, 31, 805-813.
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Cormack, L., Stevenson, S. & Schor.C. (1989, September) Hyperacuity, superresolution and gap resolution in human stereopsis. Vision Research, 29, 1597-1605.
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Cormack, L., White, K., Woods, C., Krantz, J. & Franzen, O. (1987) Binocular convergence to interocular correlations. In S. Asfour (Ed.), Trends in Ergonomics/Human Factors IV. North-Holland: Elsevier Science.

Courses

Semester         Course       Unique No.       Title

Spr 2015       NONE

2014 Spr      PSY 384C        44195       Bootstrap Statistics
2014 Spr      NEU 384C        57735      Bootstrap Statistics
2014 Spr      SSC 384          59750      Bootstrap Statistics

2014 Spr      PSY 394U       44335        Smnr Cognition & Perceptn

2013 Fall      NEU 384M       57890        Adv Statistics: Inferential

2013 Fall      PSY 384M        43875        Adv Statistics: Inferential

2013 Fall      PSY 394U        44007       1-Curr Tpcs in Cognitv Systems


 

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