2008 Volume 16 Issue 6 Pages 65-71
To evaluate image quality of hard copy using the MT method, it is necessary to collect a large number of samples from the field to construct a unit space. In this study, we propose a method for constructing a uniform unit space efficiently using an orthogonal array, In this method, factors that cause image quality variations were assigned to an L27 orthogonal array, and purposely varied image patterns were created and printed to create a group of image samples. In the selection of images for constructing a unit space, to obtain obective evaluation, observer conditions, evaluation conditions, and other conditions were allocated to an L27 orthogonal array and a sensory evaluation experiment was carried out. In this experiment, since the number of extracted samples was smaller than the number of measurement items, random dummy data were inserted into the actual measurement data to avoid decreased computational preeision due to insufficient data. The experiment confirmed that the MD values obtained by this method corresponded to human evaluation.
