成角的线条可以用对角线修描图象图象中较亮的区域用一个线条方向绘制较暗的区域用相反方向的线条绘制
Angular lines can be used to outline the image diagonally. The brighter areas in the image can be drawn with one line direction, while the darker areas can be drawn with lines in the opposite direction
以上为机器翻译结果，长、整句建议使用 人工翻译 。