Decision-Based Design of a Low Vision Aid
Abstract
A probabilistic, decision based, computer design model based on the techniques described in Systems Engineering: An Approach to Information Based Design was developed for the design of a low vision aid using a scanned laser display system called the Virtual Retinal Display. An empirical color performance and preference study with 7 low vision subjects was also conducted to verify some of the model assumptions and refine the model data. The model yielded an optimal design that uses a blue light source, has a minimum contrast of 47.4% and uses reversed contrast (light on dark) text. The maximum allowable cost of any design evaluated by the model is determined to be the most sensitive cost parameter in the model. The decision based process is concluded as useful but requires large amounts of accurate numerical data for the model parameters. Furthermore, a significant tradeoff exists between model complexity and the required computation time to eliminate the random noise experienced from the probabilistic aspects of the decision based design process.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 05, 1999
- Accession Number
- ADA372297
Entities
People
- Kyle W. Kloeckner
Organizations
- University of Washington