Following a previous study of a method of defining a comprehensive evaluation scale for evaluating images, the. method of defining the unit space was re-examined in an attempt to improve the reliability of the evaluation scale. As a result,it became possible to estimate the level of image quality of color electrophotographic images more accurately. The calculations were simplified by switching from the Mahalanobis-Taguchi adjoint (MTA) method of analysis to the Taguchi (T) method, which has shorter calculation time. Usage of the defined evaluation scale was also re-examined, leading to a proposal for an evaluation method which can not only evaluate the current image quality level but also indicate clear directions for future technological development.
