Non-contact cable diameter detection method

The invention particularly relates to a non-contact cable diameter detection method. The non-contact cable diameter detection method comprises the following steps: arranging a camera, a light source, laser and a background plate, and acquiring a cable image by using the camera; carrying out distortion correction and picture enhancement processing on the collected image, inputting the image into the trained artificial intelligence machine vision real-time semantic segmentation model, obtaining element coordinate points of which the types are cables and lasers in the image, and obtaining a pixel average value of the cable diameter; and calculating the Euclidean distance of the laser coordinate in the cable and the Euclidean distance of the laser coordinate on the background plate to obtain the conversion ratio of pixels and physical relations on the plane of the cable and the plane of the background plate, and calculating the physical diameter of the cable through a similar triangle in combination with the lase