Spatial-frequency bandwidth requirements for pattern vision A DISSERTATION SUBMITTED TO THE FACULTY OF THE GRADUATE SCHOOL OF THE UNIVERSITY OF MINNESOTA BY MiYoung Kwon IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY Adviser:

............................................................................................................... IV LIST OF TABLES ....................................................................................................... X LIST OF FIGURES ................................................................................................... XI LIST OF EQUATIONS .......................................................................................... XIII CHAPTER 1. OVERVIEW OF THE THESIS .......................................................... 1 CHAPTER 2. SPATIAL-FREQUENCY BANDWIDTH REQUIREMENTS FOR PATTERN RECOGNITION IN CENTRAL AND PERIPHERAL VISION ......................................................................................................................................... 9 INTRODUCTION .................................................................................................... 11 METHOD ................................................................................................................. 14 Subjects ................................................................................................................. 14 Stimuli ................................................................................................................... 15 Letter images ..................................................................................................... 15 Face images ....................................................................................................... 15 Image filtering ................................................................................................... 16 Image display on screen .................................................................................... 17 Measuring critical bandwidths for letter and face recognition ............................ 18 RESULTS ................................................................................................................. 20 Letter recognition in fovea and periphery ............................................................ 20 Face recognition in fovea and periphery .............................................................. 23 MODEL DESCRIPTION AND COMPARISION WITH HUMAN PERFORMANCE ..................................................................................................... 26 Model Overview .................................................................................................... 26