It is very important to get primitive geometric shape data of plants in researching virtual plant technology. The traditional manual method is time-consuming and inefficent,and measuring precision cannot meet the needs of subsequent modeling.In this paper,starting from the plant leaves,a method combining digital image processing with vector technology is discussed.Firstly,the plant leave raster image is converted into vector image and the file with DXF format is output.Finally,the results will be acquired b...