包括锐化、平滑、LOG滤波器提取边缘数学形态学的腐蚀、膨胀、骨架化、开闭运算以及分形方法画树木和树叶-including sharpening, smooth, LOG filter from the brink of mathematical morphology corrosion, swelling, skeleton, and the opening and closing operation fractal approach painting trees and leaves