Method for detecting and early warning complex wave-shaped defects of strip steel

The invention discloses a strip steel complex wave-shaped defect detection and early warning method, which comprises the following steps: step 1, video data acquisition: a data analysis module extracts a field real-time video stream from a data acquisition module and converts the field real-time video stream into image data; step 2, image data instance segmentation: separating the strip steel from the image background through an instance segmentation algorithm to obtain a coordinate point position set of the edge of the strip steel in the image; 3, tail area points are screened, whether the strip steel edge points are located at the tail of the strip steel or not is analyzed and judged, and the points in the tail area are screened out; step 4, wave defect judgment: judging whether an included angle theta formed by three adjacent points of the tail area points of the strip steel is between 'A1' and 'A2' or not, and judging that the strip steel has a wave shape when the included angle theta is greater than two;