Automatic observation method of tillering stage of sugarcane

The invention discloses an automatic observation method for the tillering stage of sugarcane, which comprises the following steps: obtaining a sugarcane image in real time; pre-processing the sugarcane image; extracting the image of a sugarcane plant; calculating the green pixel coverage FVC of the sugarcane plant; calculating the number of the apexes of the sugarcane plant; calculating the numberof leaves and stem crossing points of the sugarcane plant; if the green pixel coverage FVC>=coverage threshold FVCg, the number of apexes of the sugarcane plant>=the threshold of the value of the apexes of the sugarcane plant, and the number of intersections of the leaves and the stem of the sugarcane plant>= the threshold of number of intersections of the leaves and the stem of the sugarcane plant, determining that the sugarcane plants in the sugarcane images will enter the tillering stage. The green pixel coverage of the sugarcane plant, the number of the apexes of the sugarcane plant and the number of the intersec