| 摘要 |
PURPOSE:To output a smooth graphic picture without a complicate control by providing a irregularity in the step form change part of the slash part of a contour line having an inclination to a horizontal and a vertical lines, and visually smoothing. CONSTITUTION:In the contour line of the graphic picture having the step form part (slash part) drawn on a dot plane on a picture memory, the inclination of a straight line from a point (a) to a point (b) is calculated, and when the inclination is situated within the range of a predetermined inclination, the irregularity is applied to the slash part to smooth and correct. The smoothing and correcting is executed by correcting only two dots in a part where the contour line, for instance is near to the horizontal line or the vertical line from a certain angle. Thereby, the contour line of the graphic picture having the slash part can be visually smoothly outputted without the complicate control. |
