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In visual communication media, various symbol-logo marks as plane figures are often presented to viewers. It has been reported appearance of plane figures is varied by psychological influence depending on these layout angles in a field of vision, and the subjective geometric relations of figures are different from the objective relations. In our previous research, we have examined about relationship between the apparent size of a basic geometric form and its layout angle. When vertexes of a square were close to vertical or horizontal lines, the apparent size of the square tended to be larger than these of the other layout angles. In this study, we examined how apparent sizes of various geometric forms changed proportion were influenced by difference of the layout angle. Results show that there are some regularities on the relationship between the apparent size and its layout angle.

Effect of Layout Angle Difference of Plane Figures on Apparent Size