Ashish Ahuja,Avraham Caspi,Jessy Dorn,Robert J. Greenberg,Kelly H. McClure,Matthew J. McMahon,Devyani Nanduri
申请号：
US12548275
公开号：
US08428739B2
申请日:
2009.08.26
申请国别(地区):
US
年份:
2013
代理人:
摘要：
This system gives the experimenter great flexibility to present spatio-temporal stimulation patterns to a subject. A video configuration file (VCF) editor allows the experimenter to determine the electrical stimulation parameters for each electrode. A Pattern Stimulation software program allows direct stimulation of chosen patterns of electrodes, scaled by the subjects VCF, through a Graphical User Interface. The subject then responds by drawing the outline of the phosphene he or she perceives on a touchscreen. The Pattern Stimulation program saves all of the trial parameters and the parameters of an ellipse fit to their drawing, as well as a raw data file containing the input to the touchscreen is saved. After the experiment, offline image analysis can be performed to obtain a detailed quantitative description of the subjects percepts. Image descriptors can assigned to the touchscreen data these image descriptors can be used to make formalized comparisons between various experimental conditions. Various types of image descriptors can be used, including simple ellipse fitting, projections of the 2-D drawings onto one-dimensional axes, calculations of Hu moments, PCA, and ICA.
