Abstract:

A function named convex hull distance was constructed in order to obtain automatic feature extraction of leaf lobes. After analysis of the function, it was judged if there were leaf lobes or not. If the result was yes, the type of leaf lobes would be identified and the quantity and depth of leaf lobes would be acquired according to the function step by step. The scheme had been tested using images in tree leaf database. The results showed that the parameter of leaf lobes existence made a clear distinction between leafs with leaf lobes or not; the locations of leaf lobes on leaf contour were found precisely and the judgments on leaf lobes number were right; the parameter of leaf lobes type showed obvious difference between different leaf lobes type; the parameter of leaf lobes depth showed difference of leaf lobes in depth. The tests showed the scheme was feasible. It could be applied to systems of automatic plant identification and plant growth monitoring.