Shape from shading Currently I am investigating the effect of various shading techniques on shape perception. This project is a collaboration with Martin Banks from Berkeley’s Vision Science program, and Maneesh Agrawala from Berkeley’s Computer Science department. Web: http://jposhea.org/viswiki/
	Intracranial electrode localization We developed software to automatically localize electrodes placed on the cortical surface during neurosurgical procedures. In most cases, neuronavigation systems provide tracking devices to accurately record the positions of electrodes, but these devices fail when electrodes are placed under the dura and beyond the extent of the craniotomy. Our method uses a surface model of the cortex rendered from MRI data to accurately approximate the electrode positions. Article: ISBI2006
	Integrated image- and function-guided surgery In this project, we demonstrate the use of fMRI data in conjunction with a neuronavigation system as an intraoperative surgical planning tool. During neurosurgical procedures, the ability to identify eloquent cortex in the vicinity of the lesion is critically important. We compare our use of the fMRI data to electrocortical stimulation testing, which remains the standard intraoperative procedure. Article: IJMRCAS2006