| 摘要 |
PURPOSE:To improve plotting quality by attaining plotting a grid point located in the internal part of a ridgeline obtained virtually except a case that the ridgeline obtained virtually is coincident with the grid point. CONSTITUTION:The depth value of a direction orthogonal with a scanning line and the inclination of color data or a luminance value are calculated, after that, the depth value and the color data or the luminance value are obtained with the grid point of a polygon internal part nearest to a point on a plotting starting side ridgeline obtained virtually as a plotting starting point based on the inclination of the both directions and plane coordinates are obtained with the grid point of the polygon internal part nearest to the point on a plotting ending side ridgeline as a plotting ending point. Space from the plotting starting point to the plotting ending point is interpolated and plotted with the obtained inclination, the depth value of a plotting point and the color data or the luminance value as a initial value. Here, only the grid point located in the internal part of the ridgeine obtained virtually is plotted except a case that the ridgeline obtained virtually is coincident with the grid point. Thus, plotting quality can be improved. |
