This study aimed to clarify the factors of highly-legible and appropriate lines in embossed-dotted-graphics. Embossed-dotted-graphics are graphics expressed in embossed dots like braille dots. Nowadays, we can make them easily using PC, software, and braille embosser. Although making them became easier, are we really making graphics that are legible to blind students? One of the basic requirements for modification of graphics is making graphics that contain lines which are easily discriminated. Therefore, this study focused in the distance-between-dots and the dot-size on legibility of the embossed dotted line in people who are blind.
It was found through experiments that the distance between dots and dot size had an effect on legibility in the embossed dotted line. If 2 lines are same in dot size and different in distance between dots, it is necessary that wide distance is twice or more narrow distance for legible lines. And legibility did not improve even if the dot-size changed without changing the distance between dots. It is necessary to appropriately change both the distance between dots and the dot size.
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