Diamond cutter-based dimension detection method and device and terminal equipment

A dimension detection method and device based on a diamond cutter, and a terminal device, the method comprising: acquiring a diamond cutter contour image, calibrating the dimension of each pixel point in the diamond cutter contour image, performing edge detection on the diamond cutter contour image, and determining the dimension of each pixel point in the diamond cutter contour image; extracting straight line pairs of the edge of the diamond cutter in the contour image of the diamond cutter, determining the distance between the straight line pairs according to pixel points between the straight line pairs and the actual size of the pixel points, and determining the size of the diamond cutter in the contour image of the diamond cutter according to the distance between the straight line pairs. By implementing the method, the distance between the straight line pairs can be determined according to the pixel points between the straight line pairs of the diamond cutter contour image and the actual size of the pixel