Area Coding Techniques for Monochromatic Visual Displays
Abstract
A study was conducted to investigate the best coding scheme for differentiating among six different area types on a monochromatic visual display. Three independent variables, coding technique, display background, and foreground line thickness were studied in a 3x2x2 factorial, within-subjects design. Coding technique was studied at 3 levels. Coding technique 1 employed six patterns in one shade of gray, coding technique 2 employed three patterns in each of two shades of gray, and coding technique 3 employed two patterns in each of three shades of gray. Display background was tested at two levels, black and white. Foreground line thickness was also tested at two levels, single pixel thickness and double pixel thickness. Three dependent measures were studied target memorization time, search time, and percentage selection error. There proved to be no significant difference between coding techniques 1 and 2 at any combination of display background and foreground line thickness for either search time or percentage selection error. Coding technique 3 produced significantly poorer results both for search time and percentage selection error. Target memorization time was lower with coding techniques 1 and 2, and also with double pixel foreground thickness. Subjects preferred coding technique 1 with any combination of display background and line thickness and coding technique 2 with black display background and double pixel foreground line thickness. Keywords: Monochromatic visual display, Coding scheme, Target memorization, Human computer interaction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1988
- Accession Number
- ADA198632
Entities
People
- J. Greenstein
- S. Mukherjee
Organizations
- Virginia Tech