Door handle plate side edge U-shaped groove identification method applied to spraying system

The invention relates to the technical field of furniture plate spraying identification, in particular to a door handle plate side edge U-shaped groove identification method applied to a spraying system, and the method comprises the following steps: putting a to-be-identified workpiece into the visual field of a visual sensor, and obtaining an image 1; carrying out minimum enclosing rectangle calculation on the image 1; extracting a gray groove area from the image 1 to obtain an image 2; differentiating the image 1 and the image 2 to obtain an image 3; edge identification and primitive refinement are carried out on the image 3, and primitives are stored in an extrinsic container; traversing the external value container to obtain an element in the minimum external rectangle, and storing the element in a pointindex container; and traversing the pointindex container to obtain an index value of the target primitive. According to the method, the U-shaped groove in the side edge of the door handle plate can be accu