目的 为了探索和线画匹配的阶调再现。方法 采用明暗描画的非真实感渲染方法将阶调再现这个反映输入明暗和打印出图像的浓度关系的画质因素导入到面积变调的线画中。结果 建立了一套自动绘制线画的系统，并发现了和线画匹配的阶调再现。结论 可以看出要表现深层的感受，即使是灰度值数值段很少的明暗阶调，选择合适的阶调再现也是非常重要的。

To fulfill the right tone reproduction for line-drawing of this thesis, a Non-Photorealistic Rending approach which was bright and dark paint was adopted to introduce the quality factor into line-drawing that reflected the relationship between the brightness and darkness of the input and the density of the printed image. A set of automatic drawing system of line-drawing was established and the right tone reproduction for line-drawing was found out. It can be seen, to show deep feelings, it is also very important to select the appropriate tone reproduction even if it is very little gray numerical segment of bright and dark tone.