Objective Image Quality of CRT Displays under Ambient Glare:
Assessing the ISO 9241-7 Ergonomic Technical Standard
By Joy Kempic
Thesis submitted to the faculty of the Virginia Polytechnic Institute and State University in
partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN INDUSTRIAL AND SYSTEMS ENGINEERIN

BACKGROUND . 3
EFFECTS OF SCREEN REFLECTION TYPES .3
METHODS OF REDUCING GLARE5
METHODS OF PHYSICALLY MEASURING SCREEN REFLECTIONS.8
RELEVANT LITERATURE . 1 2
PHYSICAL MEASUREMENT STUDIES..12
HUMAN PERFORMANCE STUDIES..15
PHYSICAL (PHOTOMETRIC) AND HUMAN PERFORMANCE MEASUREMENT STUDIES20
CONCLUSIONS..23
OBJECTIVE OF PRESENT WORK .24
P H A S E 1 . 2 5
METHODS FOR PHYSICAL MEASUREMENTS.25
EQUIPMENT 26
TEST PROCEDURES FOR ISO 9241-7.26
RESULTS AND DISCUSSION..30
Monitor-Filter Combinations..32
Filters33
General Findings34
P H A S E 2 . 3 5
METHODS..35
PARTICIPANTS..39
EXPERIMENTAL CONDITIONS ..39
TASK PROCEDURE 40
RESULTS AND DISCUSSION..41