Abstract
The purpose of this study is constructing the measuring method of indication performance on papers and electronic displays to quantitatively assess the visibility. We have developed novel photometric equipment: a charge-coupled device sensor that can measure the distribution of luminance. Various types of papers printed a sinusoidal wave pattern with predetermined spatial frequency and brightness contrast: contrast sensitivity chart have been assessed by human. Also, they have been measured and parameterized. The visibility evaluation model which predict the human assessment from photometric parameter has been built by means of multiple regression analysis. This model can be applied to electrophoretic electronic paper (e-paper). It is our expectation that the measuring method will be useful to develop new displays which contains good visibility.
