Psychology 384M - Professor
Graduate Statistics
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Lawrence Cormack, Ph.D.

Lawrence Cormack photo

Phone: 471-5380 Lab: 471-5342
Office: 4.228 SEA Lab: SEA 4.330 - 4.340

Larry Cormack received his Ph.D. in Physiological Optics from the University of California, Berkeley in 1992 and joined the Department of Psychology at the University of Texas. He is also an active member of the Institute for Neuroscience and the Center for Perceptual Systems, and an Adjuct Associate Professor of Vision Science at the University of Houston.

Historically, Dr. Cormack's research interest has been in contrast processing in stereoscopic vision, which is a good model system in which to study how the brain combines signals in general. Recently, he and Scott Stevenson (of the University of Houston) have been explicitly generalizing models of contrast processing in stereopsis to the domains of spatial vision and motion perception. Dr. Cormack is also exploring some properties of motion perception via a novel illusion discovered in his laboratory. Recently however, Dr. Cormack, in collaboration with fellow CPS member Alan Bovik, has been investigating the image properties that attract gaze when viewing natural scenes and when searching for targets imbedded in naturalistic noise.

Dr. Cormack teaches mostly graduate statistics, and an advanced undergraduate statistics course.


Some Recent Publications

Liu, Y., Bovik, A.C. & Cormack, L.K. (in press) Disparity Statistics in Natural Scenes. Journal of Vision

Kirson D, Huk, AC, Cormack LK (in press) Quantitative characterization of human visual area boundaries using a bootstrapping procedure. Journal of Vision.

Jackson, R. E. & Cormack, L. K. (in press - available online). Evolved navigation theory and the environmental vertical illusion., Evolution and Human Behavior.

I. van der Linde, U. Rajashekar, A.C. Bovik & L.K. Cormack, (in press) DOVES: A database of visual eye movements. Spatial Vision.

Rokers B, Cormack LK, Huk, AC (2008) Strong percepts of motion through depth without strong percepts of position in depth. Journal of Vision, 8(4):1-10

Woodlee MT, Kane JR, Chang J, Cormack LK, Schallert T (2008) Enhanced function in the good forelimb of hemi-parkinson rats: Compensatory adaptation for contralateral postural instability? Experimental Neurology, 211(2):511-7

U. Rajashekar, I. van der Linde, , A.C. Bovik & L.K. Cormack, (2008) GAFFE: A Gaze-Attentive Fixation Finding Engine, IEEE Transactions on Image Processing VOL. 17, NO. 4,

A. Tavassoli, I. van der Linde, , A.C. Bovik & L.K. Cormack, (2007) Orientation anisotropies in visual search revealed by noise. Journal of Vision. Vol 7, Number 12, Pages 1-8

Umesh Rajashekar, Ian van der Linde; Alan C. Bovik; Lawrence K. Cormack (2007) Foveated Analysis of Image Features at Fixations. Vision Research. 41: 3160-3172

Jackson, R. E. & Cormack, L. K. (2007). Evolved navigation theory and the descent illusion. Perception & Psychophysics. Vol. 69, Number 3, Pages 353-362

A. Tavassoli, I. van der Linde, , A.C. Bovik & L.K. Cormack, (2007) An Efficient Technique for Revealing Visual Search Strategies with Classification Images, Perception & Psychophysics Vol. 69, Number 1, Pages 103-112

U. Rajashekar, T. Arnow, A.C. Bovik, and L. K. Cormack (2006) Gaze-centric image analysis for efficient visual search. SPIE Newsroom. [Online]. Available:

Rajashekar U.,. Bovik, A.C. & Cormack, L.K (2006) Visual search in noise: Revealing the influence of structural cues by gaze-contingent classification image analysis. Journal of Vision Volume 6, Number 4, Article 7, Pages 379-386

Cormack, L. K. (2005) Mathematical models of human vision. In A. C. Bovik (Ed.), Handbook of Image and Video Processing. Second Edition. Academic Press: New York.