Proposal of A Virtual Calligraphy System That Enables The Spread of Brush Tuft and The Faint Expression of Brushstrokes

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  • 穂先の広がりと筆跡のかすれ表現を可能とする 仮想書道システムの提案

Abstract

We propose a virtual calligraphy system that enables soft tufts of the writing brush and the faint expression of brushstrokes due to the change of the ink quantity contained in the brush tufts. In this system, a pen tablet that supports tilt detection is used for handwriting input. The virtual brush tuft consists of seven bundles of hair that divide the center and its periphery into six, and each hair bundle is individually deformed and moved by pen pressure and movement. Sampling points for transmitting black ink from brush tuft is arranged in the hair bundle area in contact with the paper surface, and the locus of the point moved with the deformation and movement of the hair bundle is drawn by a line segment. The brightness of the line is changed according to the change in the ink quantity. A threshold value is set for the brightness of the drawn line, and brushstroke is generated by drawing pixels having a density equal to or higher than a threshold on a bitmap image assuming a paper surface in black.

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