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CESG Seminar: Relationship Between Visual Cortical Response Power Law and Perceptual Threshold

September 18, 2012 @ 3:55 pm - 5:00 pm

Room 1037 Emerging Technology Building (ETB)

Dr. Yoonsuck Choe/CSE/TAMU


In this talk, I will talk about the strange relationship between visual perceptual threshold for edge detection and the power law property in visual cortical response distribution. The bottom line is that perceptual threshold determined by human participants are strongly correlated with an estimated threshold based on the comparison of the power law distribution to a normal distribution that has the same variance. Furthermore, the threshold estimate is in turn tightly correlated with the standard deviation of the response. I will discuss deeper implications of this finding (e.g., why compare to the normal distribution) and its relation to an intriguing mathematical function called the Lambert W function.
* Joint work with S. Sarma and H.-C. Lee.

Bio: Yoonsuck Choe is an associate professor and director of the Brain Networks Laboratory in the Department of Computer Science and Engineering at Texas A&M University. He received his B.S. degree in Computer Science from Yonsei University (Korea) in 1993, and his M.S. and Ph.D. degrees in Computer Sciences from the University of Texas at Austin in 1995 and 2001. His research interest is broadly in modeling and understanding brain function, from the local circuit level up to the whole brain scale, with a focus on the temporal and sensorimotor aspects of brain operation.


September 18, 2012
3:55 pm - 5:00 pm