Abstract: Conventional edge operators are linear filtering method. Mathematical morphology, a methodology of nonlinear filters, can maintain the basic shape of image characteristics. It has been widely used in many fields of image processing. Only using edge detection operators or morphological processing could not obtain ideal segmentation effect. According to the results of inspection edge operator, for morphological filtering, mathematics morphological operation, then the different structure elements of plant leaves were selected repeatedly for testing edge information. The quantitative analysis but not the traditional method of experiments results showed that the edge detection was an effective method based on the division of the morphology.

Key words: edge detection, morphological filtering, mathematical morphology, linear filtering, edge information of plant leaves